Essential Tools for Every Refrigeration Technician: A Comprehensive Review
Are you intrigued by the inner workings of refrigeration systems and the vital role they play in our everyday lives? Whether you’re an aspiring refrigeration technician or a seasoned pro, understanding the tools of the trade is essential.
In this comprehensive review, we delve into the top tools that every refrigeration mechanic should have in their arsenal. These tools are not mere conveniences; they are the very instruments that empower technicians to diagnose, repair, and maintain refrigeration systems efficiently and effectively.
1. Manifold Gauge Set: Refrigeration mechanics rely on manifold gauge sets to simultaneously measure high and low side pressures in refrigeration systems. These sets are like the eyes of the technician, providing critical insights into the system’s condition. By providing real-time data, refrigerant gauges are essential for diagnosing issues and ensuring optimal system performance.
2. Vacuum Pump: A vacuum pump may seem unassuming, but its role is monumental. It evacuates air and moisture from refrigeration systems before the introduction of refrigerant, ensuring that the system operates efficiently without unwanted contaminants.
3. Leak Detection Tools: Finding elusive refrigerant leaks is a challenge without the right tools. Leak detection tools, including electronic detectors and bubble solutions, play a crucial role in environmental protection and system efficiency by pinpointing these leaks.
4. Digital Multimeter: An HVACR technician’s electrical diagnostic prowess relies heavily on a digital multimeter. This tool measures voltage, current, and resistance in electrical components, making it indispensable for troubleshooting electrical issues.
5. Pipe Cutters and Flaring Tools: Copper pipes are the lifeblood of many refrigeration systems, and pipe cutters and flaring tools ensure these essential components are accurately cut and shaped for the job.
6. Pipe Benders: The importance of smooth, kink-free bends in copper pipes cannot be overstated. Pipe benders are the secret to achieving these precise bends without compromising the integrity of the pipe.
7. Thermometers and Thermocouples: When it comes to temperature measurement, accuracy is key. Thermometers and thermocouples help technicians monitor temperatures at various points in the system, assisting in both diagnostics and cooling optimization.
8. Tubing Tools: Properly preparing tubing for installation is a fundamental step in any refrigeration project. Tubing tools, such as deburrers and reamers, ensure that tubing is ready for action.
9. Hex Key Set: Hexagonal screws and bolts are commonplace in refrigeration systems. A set of hex keys is a technician’s trusty companion for swiftly disassembling and reassembling components.
10. Oil Pump and Oil Injector: Lubricating oil is the lifeblood of compressors. Oil pumps and injectors ensure that the compressor functions optimally by delivering the right amount of lubrication.
11. Torque Wrench: Precision matters in refrigeration systems. Torque wrenches guarantee that bolts and nuts are tightened to precise specifications, safeguarding components and maintaining proper seals.
12. Digital Scale: In the intricate world of refrigeration, precision is paramount. This is where a digital scale steps in as a silent but indispensable partner for refrigeration mechanics. Why? Because refrigerants, lubricants, and various chemicals must be added to systems with meticulous accuracy.
A digital scale ensures that the right quantities are added, helping maintain the system’s efficiency, performance, and, perhaps most importantly, the environment. It’s not just about getting the job done; it’s about getting it done right, and that’s where the digital scale shines. So, let’s weigh in on the importance of this often-overlooked tool in the refrigeration technician’s toolkit.
These tools are the cornerstone of any refrigeration technician’s toolkit. Stay tuned as we dive deeper into each of these essential instruments, unveiling the art and science behind their usage, and why they’re indispensable for refrigeration technicians around the globe.
In this article we’ll answer a question that we get all the time. What filter, if any, can filter out the SARS-CoV-2 virus which leads to COVID-19, the disease? We’ll show you how efficient the different air filters are at filtering out various items for asthma and allergy sufferers, and the virus that leads to COVID-19.
If you prefer to watch the Video of this presentation, then scroll to the bottom or click on the following link. Air Filters vs COVID-19
The ability of an air filter to remove microorganism, dust, pollen, dust mites, mold spores, pet dander, bacteria and viruses is indicated by a numerical value. This number, which is indicated as a MERV rating, states the filter’s efficiency at removing various sizes of these items. We’ll show you which filters, if any, work the best to protect you from these potentially harmful organisms.
MERV Rating
Minimum Efficiency Reporting Values, or MERVs, indicate the filter’s ability to capture larger particles, those 0.3 microns and larger. The higher the numerical rating, the greater the air filter is at removing particles from the air stream. A MERV-13 is better than a MERV-11 filter at removing particles, but how good are they against bacteria and a very small virus that leads to COVID-19.
Virus and Bacteria Removal
According to ASHRAE, research has shown that the particle size of the SARS-CoV-2 virus that leads to COVID-19 is around 0.1 microns. This is much smaller than what may be picked up by these air filters. As this chart shows, the virus lives in the invisible region, while others like dust, cat dander and human hair are visible to the human eye.
Sizes of various items shown in Microns. Invisible items in black area on chart, including the SARS-CoV-2 Virus.
Luckily, the SARS-CoV-2 virus doesn’t travel through the air own its own. It rides on respiratory droplets and droplet nuclei (dried respiratory droplets) that are predominately 1 micron in size and larger. These filters have various efficiencies at capturing the viruses that are in the 1-to-3-micron range according to ASHRAE.
The SARS-CoV-2 virus riding a respiratory droplet in the 1 to 3 micron range
ASHRAE
As the chart shows, ASHRAE recommends using a minimum of a MERV 13 filter, which is at least 85% efficient at capturing particles in the 1 to 3-micron size range. A MERV 14 filter is at least 90% efficient at capturing those same particles. High-efficiency particulate air (HEPA) filters are even more efficient at filtering human-generated infectious aerosols.
MERV Rating and Air Filter Efficiency for Particle sizes 1 to 3 microns in size
By definition, a HEPA air filter must be at least 99.97% efficient at capturing particles 0.3 micron in size. This 0.3-micron particle approximates the most penetrating particle size (MPPS) through the filter. HEPA filters are even more efficient at capturing particles larger AND smaller than the MPPS. Thus, HEPA air filters are more than 99.97% efficient at capturing airborne viral particles associated with SARS-CoV-2 which leads to COVID-19.
HEPA filters can capture and trap microorganisms, including viruses and bacteria, helping to reduce the risk of respiratory infections. So, if possible, use the highest MERV rated air filter with your system, or get a portable HEPA air filter for your room or office. HEPA filters are the most efficient at capturing small microorganisms like the SARS-CoV-2 virus.
Where are HEPA Filters used?
HEPA air filters are used in residential, commercial, and industrial facilities. In homes there are portable types that can be moved from room to room, and others that can be installed in a central air conditioning system serving the whole house.
HEPA air filters are also used along with ULPA filters in cleanrooms, labs, and other spaces requiring a very clean environment.
Asthma and Allergy Management
For individuals with asthma, HEPA filters help reduce asthma triggers like airborne irritants and respiratory allergens. According to the Asthma and Allergy Foundation of America (AAFA), nearly 26 million people have asthma in the United States. There are 4.8 million children under the age of 18, and nearly 21 million adults suffering from asthma. On average, 10 people in the unites States die every day from asthma. A total of 3,517 deaths in 2021.
According to the AAFA over 100 million people each year in the United States experience various types of allergies. Allergies are the sixth leading cause of chronic illness in the U.S. HEPA filters are highly effective at removing allergens such as pollen, dust mites, and pet dander, providing relief to allergy sufferers.
Editorial Process:
Some of the links in this article may be affiliate links, which can provide compensation to the MEPAcademy at no cost to you if you decide to purchase. Our reviews and articles are made by an industry professional experienced in the engineering and construction of commercial buildings.
Are you paying too much for your HVAC equipment? How do you know if the quote you received for your equipment is a fair price? Do you have a method of comparing what you have paid for various HVAC equipment with what is being quoted currently?
Keeping track of the cost of HVAC Equipment allows you to quickly provide budgets and check the cost of equipment before you purchase. This database allows you to easily keep track of the most common HVAC equipment.
HVAC Equipment Cost Database
Using an HVAC Equipment cost database will save you a lot of money by avoiding the costly mistake of paying too much for equipment.
Air Conditioners in Historical Pricing HVAC Equipment Database
The HVAC Equipment Cost database keeps track of all your equipment quotes or purchases for easy reference and parametric checks, such as cost per ton ($/Ton), cost per CFM ($/CFM)
For an HVAC Piping Estimators the need for quick budgets for the installation of piping is best handled with a spreadsheet of different material types and sizes. Having an estimating software program can make this process a lot easier, as the material pricing is always up to date and can be entered into the spreadsheet quickly. You can get a copy of this spreadsheet to help you price piping fast and efficiently.
HVAC Piping Unit Pricing Calculator
HVAC PIPING UNIT PRICING
Often the requirements of the RFP or bidding instructions will call for the price per foot to install piping beyond that which is required by the contract drawings. Such pricing maybe used for change-orders. Having these numbers available and updated often also gives you a quick reference for budgeting projects. It’s good to know when doing job site comparisons of different piping options or during discussions with engineering, what the cost is for the various piping sizes and types of materials.
HVAC Piping Unit Pricing Calculator for Copper and Carbon Steel from 1/2″ to 14″
COST PER FOOT
The cost per foot for the installation of piping needs to include fittings and hangers prorated into the value. It’s best to look at a standard length of pipe and then figure that you will have a Tee and 90 degree elbow in that length.
So for example, using twenty feet of copper water pipe with a Tee and 90 degree elbow plus the hangers to build a unit price would represent a field condition of a fitting every ten feet.
For higher density projects like Hospitals you could put more fittings in your unit pricing. Total those cost up and then divide by 20 to derive at a cost per foot for that particular size and material type.
20 feet of pipe + 2 Fittings + 3 Hangers / 20 = Cost per Foot
If the piping is insulated, you can also put the values in for insulation.
The Estimating Wizard provides two spreadsheets for tracking unit pricing, one for HVAC Piping and the other for Plumbing piping. Get a copy and start tracking your cost per foot, or be prepared to give a quick budget based on your knowledge from your spreadsheet of unit prices. Watch the video below to see how quick and easy it is to track the cost per foot for various sizes and material types.
MEP Academy HVAC Piping Unit Pricing Spreadsheet
The MEP Academy provides a spreadsheet that makes calculating unit pricing simple. The spreadsheet is available by following this link, HVAC Piping Unit Pricing Spreadsheet
HVAC Piping Unit Pricing Calculator Example
In the screenshot above there is a place for you to build your hanger requirements (#1), and a place to put your tax rate and hourly labor rate (#2).
For each size of pipe and material type you would insert the unit cost for Material (#3) and Labor (#4).
Under item (#5) you would build your typical run of pipe and enter the quantity of fittings you might expect for the type of building and system. You would add whatever you think will be required for every so many feet of pipe. In the example above we are showing that for every 20 feet of pipe you will have 1 Elbow and 1 Reducing Tee.
Under item (#6) you would add the cost per lineal foot for insulation if required. You could also look at insulation as a separate value and leave the pipe bare.
Line item (#7) is where you indicate the hanger spacing, and for each hanger you defined under item (#1) you will get the quantity as defined by the linear feet in item (#5) divided by your hanger spacing, which will affect your cost.
Line item (#8) is the calculated cost per linear foot of piping for that size and material type of pipe.
Summary Sheet
After you have all your unit pricing information inputted into the spreadsheet, all you have to do to get a budget for installing piping is to enter the quantity of piping (#9) for each size and material type (#10). The system will automatically calculate the cost (#11) to install that run of piping based on your unit pricing data. The total cost will be shown at the top of the spreadsheet (#12).
The proper sizing and layout of condensate drain lines is important for the protection of property and for the proper functioning of the air conditioning equipment.
If you prefer to watch our YouTube version of this presentation, scroll to the bottom.
Condensate Drain Pipe Sizing
The size required for the condensate pipe is dictated by the local code. Enclosed you will find the requirements for many local codes, but be sure to check your code for your local requirements. If the outlet size of the equipment’s condensate drain is larger than what’s shown in this chart then your required to use the larger outlet size.
Minimum Condensate Drain Pipe Sizing Chart
Slope to be at least 1/8” per foot or 1 percent, that is for every 12” horizontally there must be at least an 1/8” drop vertically.
Condensate drain piping to slope a minimum of 1/8″ per every 12″ horizontal
Attics or Furred Spaces
If the Air Conditioner is suspended above an inaccessible ceiling, such as a gypsum board ceiling or attic space then you will need to provide a means for protecting the building elements from the overflow of the primary drain and for indicating that there is a leak.
Also, drain pans that are poorly drained can cause water to stay in the pan risking the possibility of algae and bacteria growth. Below are some possible solutions, but as always check your local code for the approved method.
Option 1 – Secondary drain pan with drain piping. This would hang below the Air Conditioning unit in case the A/C units primary pan overflowed. Also, there is a requirement to provide secondary drain piping to a point of termination that would provide notification to the occupants that there is a leak, such as terminating above a window or doorway.
Option 1 – Secondary drain pan with piping terminating in observable location
Option 2 – An additional drain pipe connection that sits above the primary drain connection and whereby the secondary drain piping terminates in a location to alert the occupants of the clogged primary drain.
Option 2 – Secondary drain piping connection to primary drain pan
Option 3 – Leak detection device that automatically shuts down the Air Conditioner if the primary drain becomes clogged.
Option 3 – Primary drain with leak detection device
Option 4 – Secondary drain pan with leak detection, located beneath the coil that shuts down the unit upon a leak.
Option 4 – Secondary drain pan with leak detection
The additional drain pan or drain pan connection shall be provided with a drain pipe that will determinate in an observable area, such as in front a window or above a doorway, and be of a size not less than 3/4”. Secondary drain pan shall not be less than 1-1/2” in height and extend 3” wider on each side of the coil or AC unit.
Secondary drain piping terminating above window. Pipe doesn’t have to be visible as shown.
Drain Termination
Where can and can’t you terminate the air conditioners condensate drain piping? There are several options where you can terminate the condensate drain line;
Indirect Drain
Condensate Pump to Indirect Drain
Drywell
Leach pits
Landscaped areas that are properly designed to handle the volume of condensate
To Properly designed stormwater treatment systems.
Indirect Drain
Lavatory tailpiece in the same tenant space as the air conditioner
Laundry standpipe
Janitors Sink
Inlet of Bathtub Overflow – Must be accessible
Collect and send to cooling tower (See description below)
Cooling Coil condensate to sink tailpiece.
The connection to a plumbing fixtures tailpiece has to be made within the same tenant space as the air conditioner cooling coil that is generating the condensate.
Drywell
A drywell can be used for the termination of your air conditioners condensate drain. Check your local code for the specifics, but generally it includes some or all of the following depending on whether it’s for residential or a commercial project:
A minimum size hole, such as 2 foot by 2 foot by 3 feet deep, or a round hole such as 12” diameter by 3 feet deep.
A minimum of 6” of soil or concrete shall provide cover above the rocks
Some form of barrier between the soil and the top of the drywell where the rock begins, such as building paper or plastic
Drywell to be filled with gravel or crushed rock, often with a stated minimum size rock such as 1 inch diameter
The termination of the condensate drain pipe shall connect indirectly to the drywell drain pipe.
The drywell drain pipe to be a minimum of 1-1/2” PVC or other approved material.
Drywell to be at least three feet away from the building structure or any footings.
Drywall for Air Conditioner Cooling Coil Condensate
There are various methods of providing drywells depending on the local code. There are prefabricated drywells that can be used and ones that are made by using a large diameter piece of PVC pipe or similar material.
Some codes will require you to collect the condensate from cooling coil drain pans and return it to the cooling tower if the equipment is served by a cooling tower and the total combined capacity of the HVAC cooling coils exceeds a certain amount like 65,000 btu/hr.
This is a water conservation measure, and there are some exceptions to this requirement, such as if the total capacity of the AC Equipment cooling coils are less than 10% of the total capacity of the cooling tower, or if the location of those AC Cooling coils are in a remote location, far from the tower.
Some locations where you can’t terminate condensate;
Public ways
Sidewalks
Driveways
Alleys
No termination of condensate on public area ways
Excluded from Code Requirements
Excluded from these codes are non-condensing type of equipment like radiant cooling panels that are designed to prevent condensate from occurring by keeping the temperature of the chilled water above the dew point temperature/vapor pressure of the surrounding air. These are system designed to operate in sensible cooling only modes.
Piping Material
The material types that can be used for condensate drain piping varies by jurisdiction but the most commonly cited materials are:
Copper
PVC – DWV
CPVC
ABS – DWV
Polyethylene
Galvanized steel
Cast iron.
Also the use of short radius 90-degree elbows are often prohibited. You can normally use standard fittings until you reach a certain size at which point you might be required to use drainage pattern fittings (DWV)
Traps
Traps are to be installed as required per the manufactures recommendation. No traps are required on the secondary drain pan, this is to allow immediate notification that the primary drain has failed.
Cleanouts
Cleanouts are required in case of plugged drain pipes. Provide as required to prevent the need to cut drain pipes for unplugging. Some of the following maybe used for cleanouts if approved by your local code authority;
Plugged tees
Union connections
Short clamped hoses at the unit (see image above)
When you have more than one air conditioning unit condensate tied to a main condensate pipe, then every change of direction shall have some method of cleanout. Check your local code as this maybe a requirement for even a single air conditioners condensate piping.
Condensate Pumps
Condensate pumps can be used to elevate the condensate vertically to a point where it will then discharge into a code approved gravity sloping condensate drain line. The condensate pump should be interlocked with the Air Conditioning Unit to prevent its operations if the condensate pump is inoperable.
Please remember that code requirements are always changing, so check for the most current code in your area at the time of design and installation. Or ask an inspector for the current installation practice.
Having an MEP Academy Estimating Spreadsheet that automates portions of your estimates, will save you valuable time that could be used to make more sales. All aspects of the cost of furnishing and installing an HVAC and/or a Plumbing system is contained in one spreadsheet made specifically for the MEP industry. For plumbing only see below.
For a Plumbing only Spreadsheet, use this Commercial & Residential Version. Plumbing Only. For a simple Residential HVAC & Plumbing Spreadsheet. Residential version.
Dashboard
The Main Dashboard provides you with all the information you need to make a quick decision on whether to make further adjustments, or if one of the metrics looks out of place based on historical data. The Dashboard gives you a quick overview of all that is going on within the Estimating Spreadsheet.
Estimating Dashboard within the MEP Academy Estimating Spreadsheet
Your MEP Academy Estimating Spreadsheet needs to be able to handle rental equipment, general conditions, subcontractors, piping and plumbing takeoffs, sheet metal, labor rate tables with crew mix capabilities, , and a bid summary. Each sheet in the estimating spreadsheet automatically calculates the values you enter, showing you a new total bid amount.
Will cover portions of the MEP AcademyEstimating Spreadsheet starting at the back of the Excel spreadsheet and working our way toward the front summary page last.
Choose your crew mix based on the level of experience and the different pay scales based on each project. Pick any combination and quantity of tradesman based on the requirements of the project.
Labor Rates and Crew Size within the MEP Academy Estimating Spreadsheet
There is a separate crew labor rate for HVAC Piping Shop & Field, Sheet Metal Shop & Field, and Plumbing.
Enter the project equipment price and labor to rig the HVAC and Plumbing equipment into place. Compare supplier pricing easily side by side. The MEP Academy Estimating Spreadsheet automatically selects the lowest bidder but lets you override that decision.
HVAC Equipment page within the Estimating SpreadsheetHVAC & Plumbing Equipment Sheets
Do you need a jobsite trailer or onsite management? Enter the quantity and level of the staff required to run the project, whether one person or dozens. Set the quantity and duration of each general condition, along with the rate. General Conditions is broken down into three sections as follows: #1 – Management, #2 – Construction Office (Non-Reoccurring Expenses), and #3 – Construction Office (Reoccurring Expenses).
HVAC & Plumbing contractors often subcontract out for Air & Water Balance, Sheet Metal & Piping Insulation, Water Treatment, Building Automation, Excavation and other specialty trades that they don’t self-perform. This spreadsheet was made especially for the HVAC & Plumbing contractor and their most often used subcontractors.
For those contractors that do plumbing the following Plumbing Fixture sheet will give you a place to record your vendors quotes and the labor it takes to install each type of fixture. What is also revealed is the overall cost per fixture.
Plumbing Fixtures page within the Estimating Spreadsheet
Each trade has a specialty sheet for those items that aren’t considered equipment or a fixture, but for which there is a cost impact. The MEP Academy Estimating Spreadsheet includes Sheet Metal, HVAC Piping & Plumbing Specialty sheets.
HVAC and Plumbing Specialty Pages within the Estimating SpreadsheetSpecialty Sheets in Estimate Spreadsheet
Material & Labor Summary Sheets
You will find a Sheet Metal, HVAC Piping & Plumbing material & labor summary sheets where all of the other specialty sheets are summarized for your review and last minute edits. Each sheet will be divided between field & shop fabrication work. The first section covers the field installation items.
Sheet Metal Material and Labor Summary – Estimating Spreadsheet
Each of the field labor summary sheets contain a row to add for the following
Material Handling
Consumables
Punch List
Cleanup
Detailing
Supervision
Shop Fabrication Summary Section
For those of you that have a fabrication shop, there is a section to add material and labor.
Shop Fabrication Summary
Rentals
For those HVAC air conditioning and Plumbing projects that require a crane, fork lift, scissor lift or any other equipment that you don’t own but will be required on the project. Having a spreadsheet that maintains a list of the most common equipment you normally rent along with their rental rate will save you time and money while avoiding having to call for pricing on every job.
Rental Sheet in Estimating Spreadsheet
Engineering
If you do your own design then you should have a sheet of each of the personnel responsible for spending time on the engineering task. If you’re doing design/build work, but don’t do the engineering yourself, but hire a third party, then you should add some engineering review time. It’s your responsibility to manage your third-party engineer to make sure they design within your cost parameters.
All of your estimates are summarized on the last tab of the MEP Academy Estimating Spreadsheet for easy review. You can quickly scan each of the categories to see where all the project cost has shown up. There is the labor and material summary for HVAC Sheet Metal, HVAC Piping, and Plumbing and another section for Subcontractors, General Conditions, Rentals, etc.
Estimating Spreadsheet Summary PageMEP Academy Estimating Spreadsheet Summary
The MEP Academy Estimating Spreadsheet contains a bid risk assessment form that rates the success of winning any particular project that you are contemplating pursuing. The risk assessment form will help you determine if the project is worth bidding based on a set of questions that rate your answers.
Bid Risk Assessment
The answers to these questions will give you a score from which you can use to see how the project rates on a scale of risk and reward. The total risk assessment score will also inform you which level of approval is required within your company depending on how you rate your risk values as the example shown below. The total score is 25, which according to this contractor would require the Vice President to sign-off on the project or approve the decision to pursue bidding on the project.
The MEP Academy Estimating Spreadsheet is used to gather all the information for estimating a project, putting it into a format where you can make quick adjustments and decisions while the spreadsheet gives you an immediate update on the price.
Purchase this spreadsheet at its currently reduced price of ONLY $245.00, which usually sells for $599.00
Watch the YouTube video below to see the MEP Academy Estimating Spreadsheet in action.
How long should you run your air purifier? Air purifiers have become essential in many homes, especially for those dealing with allergies, asthma, pet dander, smoke, or just a general desire for cleaner indoor air. But one common question is: How long should you run your air purifier for it to work effectively?
Let’s break it down.
1. Understanding How Air Purifiers Work
Air purifiers draw in air from the surrounding environment, filter it through various stages (like HEPA filters, activated carbon, UV lights, or ionizers), and then release the cleaned air back into the room. The efficiency of this process depends on the air changes per hour (ACH) and the clean air delivery rate (CADR) — two key performance metrics.
ACH indicates how many times an air purifier can exchange the entire air volume in a room in one hour.
CADR tells you how quickly the purifier can remove specific contaminants like dust, pollen, and smoke.
These determine how fast and effectively your air is cleaned.
2. So, How Long Should You Run an Air Purifier?
For Maximum Effectiveness: Run It Continuously
The most effective way to maintain clean indoor air is to run your air purifier continuously, especially if:
You have allergies or respiratory conditions.
You live in an area with high pollution or wildfire smoke.
You have pets that shed dander and fur.
Someone smokes indoors.
You cook frequently and want to reduce odors and airborne grease.
Modern air purifiers are designed to run 24/7 and are energy efficient, especially those with Energy Star certification. Most have sensors to adjust fan speed based on air quality levels, helping save power and extend filter life.
Minimum Recommended Time: 12+ Hours a Day
If running it all day isn’t feasible, aim for at least 12 hours per day. Ideally, split the usage across times when you’re at home — especially in the bedroom at night and living areas during the day.
3. How the Air Quality Index (AQI) Affects Run Time
Air Quality Index (AQI) Indicates various levels of Air Quality based on a numbering system that is published regularly
The Air Quality Index (AQI) is a standardized system used to report and track air pollution levels. It’s a helpful tool that can guide how long and how often you run your air purifier — especially if you’re in an area prone to poor outdoor air quality.
What Is the AQI?
The AQI measures five major air pollutants regulated by the Clean Air Act:
Ground-level ozone
Particulate matter (PM2.5 and PM10)
Carbon monoxide
Sulfur dioxide
Nitrogen dioxide
Each pollutant is given a score, and the highest value becomes the AQI for that location. The scale runs from 0 to 500 — the higher the number, the greater the level of pollution and the more serious the health concern. You can check your local AQI using apps like AirVisual, Plume Labs, EPA’s AirNow, or even some smart air purifiers with real-time AQI monitors.
AQI Categories and What They Mean
AQI Range
Air Quality
What It Means
Suggested Action
0–50
Good
Air quality is satisfactory
Normal usage
51–100
Moderate
Acceptable, but could affect sensitive individuals
Run purifier during peak hours
101–150
Unhealthy for Sensitive Groups
People with asthma or allergies may feel effects
Run purifier more frequently
151–200
Unhealthy
Everyone may begin to experience effects
Run Purifier 24/7
201–300
Very Unhealthy
Health alert: serious effects possible
Stay indoors, run multiple purifiers if needed
301–500
Hazardous
Emergency conditions
Seal the space and use purifiers at maximum capacity continuously
How to Adjust Run Time Based on AQI
On good air days, you can reduce run time slightly — though keeping the unit running still helps maintain indoor freshness.
On moderate to unhealthy days, run the purifier in common areas and bedrooms continuously.
During high AQI events like wildfires, dust storms, or pollution spikes, keep windows closed and run the purifier 24/7 on high or auto mode.
4. Other Factors That Affect Run Time
Room size: Larger rooms may take longer to cycle the air. Match the purifier’s CADR to your room’s square footage.
Pollution level: Homes with pets, smokers, or urban settings may need longer operation.
Filter quality and type: HEPA filters are highly efficient and ideal for allergens; carbon filters help with odors and VOCs.
Airflow and layout: Open-plan homes or rooms with poor ventilation may need more coverage or longer run times.
5. Tips for Optimal Use
✅ Keep doors and windows closed while the purifier is running — this prevents new pollutants from entering.
✅ Place it centrally in the room but away from walls and obstructions.
✅ Clean or replace filters regularly based on the manufacturer’s schedule.
✅ Use auto mode or a smart timer to balance performance and energy savings.
✅ Track AQI levels daily and adjust purifier usage accordingly.
6. ✅ Advantages of Running an Air Purifier Continuously (24/7)
Advantage
Details
Consistent Air Quality
Running it all day ensures pollutants like dust, pollen, smoke, and pet dander are continuously filtered out.
Ideal for Allergy & Asthma Sufferers
Maintains a low-allergen environment at all times, reducing symptoms.
Handles Sudden Air Quality Changes
Helps protect against unexpected spikes in pollutants (e.g., wildfire smoke, cooking odors).
Better for Pet Owners & Smokers
Keeps up with constant sources of dander, hair, and tobacco smoke.
Smart Features Work Best
Many purifiers with sensors or auto modes optimize performance best when left on.
Improves Sleep Quality
Quiet models improve nighttime breathing and comfort, especially for sensitive individuals.
Low Energy Use
Most modern units are Energy Star certified and designed to run efficiently long-term.
7. ⚠️ Disadvantages of Running an Air Purifier Continuously
Disadvantage
Details
Increased Electricity Usage
Though usually minimal, running 24/7 will increase your energy bill slightly, especially with large or multiple units.
Filter Replacement Costs
Filters may need to be replaced more frequently if the unit runs non-stop.
Noise (for Some Models)
Some purifiers, especially on higher fan speeds, may produce noticeable sound, which could be disruptive in quiet spaces.
Possible Over-Drying (Rare)
In some environments, constant air movement can lead to slightly drier air—especially in winter—though this is rare with modern purifiers.
Wear and Tear
Continuous use may reduce the unit’s lifespan slightly, depending on build quality and maintenance.
💡 Tip:
To balance the pros and cons, you can:
Use auto or eco mode when available.
Run on low or sleep mode at night.
Set smart timers to focus on peak pollution times (like during cooking or pollen hours).
Maintain filters to keep performance high and extend unit life.
8. Conclusion: Let AQI and Conditions Guide You
To keep your indoor air truly clean, run your air purifier continuously or for long stretches daily, especially when AQI is moderate or worse. Think of it like your refrigerator — you wouldn’t turn it off for hours and expect your food to stay fresh. Similarly, purified air doesn’t stay clean for long if the purifier is off.
Monitor your AQI, adjust your run time, and enjoy cleaner, healthier air year-round.
Frequently Asked Questions
1. How many hours a day should you run an air purifier?
For best results, run your air purifier continuously (24/7), especially if you have allergies, pets, or live in an area with high pollution. At a minimum, aim for 12 hours a day to maintain clean air in frequently used rooms.
2. Should I leave my air purifier on all the time?
Yes, most air purifiers are designed for continuous use and are energy-efficient. Leaving it on helps maintain consistently clean indoor air. Many models have auto or eco modes that adjust fan speed based on real-time air quality, helping reduce power consumption.
3. Does outdoor air quality (AQI) affect how long I should run my air purifier?
Absolutely. When the AQI is high (especially above 100), you should run your purifier continuously and keep windows and doors closed. Poor outdoor air quality can rapidly degrade indoor air, making extended purifier use essential.
4. Is it safe to sleep with an air purifier on at night?
Yes, it’s not only safe but highly recommended. Running an air purifier while you sleep helps filter out allergens, dust, and pollutants, improving sleep quality and reducing nighttime allergy symptoms.
5. Can I run an air purifier with windows open?
While it’s possible, it’s not ideal. Open windows allow outdoor pollutants to enter, making it harder for the air purifier to keep up. For maximum efficiency, keep windows and doors closed while the purifier is running.
6. How do I know if my air purifier is working effectively?
Look for signs like cleaner-smelling air, less dust buildup, and fewer allergy symptoms. Smart air purifiers often have real-time air quality monitors. Also, ensure filters are clean and replaced regularly.
When shopping for a portable air purifier or air cleaner, one of the most important specifications to consider is the Clean Air Delivery Rate (CADR) rating. This rating plays a vital role in determining how well a purifier will perform in your home or office environment. But what exactly does CADR mean, and how is it calculated?
What Is CADR?
CADR stands for Clean Air Delivery Rate. It is a standardized metric developed by the Association of Home Appliance Manufacturers (AHAM) to measure the effectiveness of portable air purifiers. CADR indicates the volume of clean air (free from specific pollutants) that an air purifier can deliver per minute.
The CADR rating helps consumers compare the performance of different air purifiers in removing three main types of indoor air pollutants:
Smoke (smallest particles, ~0.09–1.0 microns)
Dust (medium particles, ~0.5–3 microns)
Pollen (largest particles, ~5–11 microns)
Each type of particle has its own CADR score, usually ranging from 0 to 450 (depending on the unit’s size and power).
Air Purifier Sizing Chart
This Air Purifier or Air Cleaner sizing chart is based off the metrics used by AHAM in calculating the CADR values. The CADR values are based on 5 air changers per hour (ACH) and an 8 foot ceiling. The chart has two major columns, one based on Air Changes per Hour and the other based on ceiling height. If you don’t understand what air changes are then see our video on How to Calculate Air Changes per Hour.
Air Purifier Sizing Chart based on CADR at 5 ACH and 8 foot Ceilings with Adjustments for other conditions.
If you know the square footage or square meters of the room you want to put the portable air purifier then find the room size in the first two columns and then move horizontally across until you reach the 5 Air Changes per Hour Column to get the CFM or the CADR rating for Smoke. There are three ratings found on air purifiers, but if you use the smoke value given on the Air Purifier then this will give you the best option for air flow. You can download a copy of this chart below.
If the room where you want to put the air purifier has a ceiling higher than 8 feet (2.4m), then you can use the blue columns. The adjustment for ceiling height uses the 5 air changes per hour value, so if you want more than 5 air changes per hour pick a size greater than what is shown in the table.
Clean Air Delivery Rate (CADR) Formula
Clean Air Delivery Rate (CADR) Formula
The formula for calculating the Clean Air Delivery Rate (CADR) is very basic and takes into consideration everything in our chart above.
CADR = Room Area x Ceiling Height x Air Changes per Hour / 60 minutes in an Hour
What Does the CADR Rating Mean?
Let’s say an air purifier has the following CADR ratings:
Smoke: 200
Dust: 220
Pollen: 250
This means the unit can reduce the concentration of smoke particles by delivering 200 cubic feet per minute (CFM) of clean air. The higher the number, the more efficient the unit is at cleaning the air for that particular particle type.
CADR ratings make it easier to choose an air purifier suited to the size of your room and the specific pollutants you’re targeting.
How Is CADR Calculated?
CADR is determined through controlled lab testing under AHAM standards. Here’s an overview of the process:
Controlled Environment: The purifier is placed in a sealed chamber, typically around 1,008 cubic feet in volume.
Pollutant Introduction: A measured amount of smoke, dust, or pollen is introduced into the air.
Air Purifier Activation: The purifier runs at its highest fan speed.
Measurement: Instruments track how quickly and effectively the unit reduces the concentration of each pollutant.
Calculation: The CADR is calculated based on how fast the concentration of pollutants drops, factoring in natural air loss (decay) and the volume of the room.
The formula used by AHAM essentially looks at the rate of particle removal by the purifier minus the rate of natural decay, converted into a volume per minute.
Matching CADR to Room Size
AHAM recommends choosing a purifier with a CADR rating that is at least two-thirds the size of your room in square feet. For example:
A 150 square foot room would need a purifier with a minimum CADR of 100.
For larger rooms (like 300 sq ft), look for purifiers with CADRs of 200 or more.
Why Clean Air Deliver Rate (CADR) Matters
CADR is one of the few standardized, third-party tested metrics in the air purifier industry. It ensures:
Objective performance comparisons
Clarity in marketing claims
Proper sizing of purifiers for effective cleaning
However, CADR has limitations. It doesn’t measure performance against gases, volatile organic compounds (VOCs), or microbes. It’s also based on short-term performance and does not account for noise level, filter lifespan, or energy use.
Final Thoughts
CADR is a critical number to understand when selecting a portable air purifier. It tells you how well a unit will remove common indoor pollutants like smoke, dust, and pollen. By understanding CADR ratings and how they’re calculated, you can confidently choose an air cleaner that meets the needs of your space and improves your indoor air quality.
If you’re trying to breathe cleaner air, don’t just go by brand name or fancy features — check the CADR ratings to make an informed choice.
Air purifiers can significantly improve indoor air quality, but their effectiveness largely depends on their placement. Use these Air Purifier Placement Tips to strategically position your air purifier, so you can enhance its performance and enjoy cleaner, healthier air throughout your home or office. Let’s explore the best locations for air purifiers in various rooms and situations.
Air Purifier Placement Tips
How to properly locate an Air Purifier
Central Location
Place your air purifier in a central area of the room to allow for efficient airflow and circulation. Keep the device away from walls, corners, and other obstructions. A good rule of thumb is to ensure 3-5 feet (0.9-1.5 meters) of clear space around the unit for unimpeded air intake and output.
Elevation
Positioning your purifier slightly off the ground can improve its performance. For small, portable units, placing them on a table or shelf can be beneficial. It’s recommended to elevate the air purifier no higher than 5 feet (1.5 meters) off the ground.
Near Pollution Sources
Position your air purifier between people and potential pollution sources. For example, if you have a wood-burning fireplace, place the purifier nearby to capture smoke particles.
Room-Specific Air Purifier Placement Tips
Bedroom
Place the unit 6-10 feet (1.8-3 meters) from the head of your bed. This allows the purifier to clean the air you breathe while sleeping without blowing air directly at your face. Choose a quiet unit to minimize sleep disturbances.
Living Room
For living rooms, which are often larger and more open:
Position the purifier in a central, open area for maximum coverage.
Place it near key seating areas like the couch, ensuring furniture doesn’t block the device.
Avoid tight spaces where airflow might be restricted.
Keep the purifier away from electronic devices.
Kitchen
Kitchens are hotspots for odors, smoke, and grease particles. To combat these:
Position the purifier near the cooking area but away from direct heat sources.
Place it close to sources of odors, such as near the garbage bin.
Opt for a unit with a high-quality activated carbon filter for effective odor removal.
Home Office
In a private office, place the air purifier where it won’t be distracting or interfere with your work area. Ensure it’s positioned to effectively circulate air throughout the space. Consider placing it near your desk to reduce dust and particles you might breathe in while working.
Office Spaces
For larger office environments:
Place air purifiers in high-traffic areas like reception areas or near photocopiers.
Consider multiple units for open-plan offices, strategically placed to cover the entire space.
Position purifiers near ventilation systems to help clean incoming air.
In conference rooms, place units near seating areas for optimal air cleaning during meetings.
Special Considerations
Pet Areas
Position the air purifier as close as possible to where your pets spend most of their time. This helps capture pet dander and odors.
High-Traffic Areas and Entryways
Place an air purifier near entryways or in hallways to capture pollutants before they spread to other rooms.
Multi-Room Homes or Offices
If you have multiple air purifiers, position them strategically across different rooms. Leaving doors slightly open allows air to circulate between spaces.
Calculating Air Purifier Needs
How to size an Air Purifier using the 2/3rds method. 5 Air Changes with an 8 foot Ceiling.
To determine the right air purifier for your space:
Calculate the room size: Multiply length by width. For example, a room 12 feet (3.7 meters) long and 10 feet (3 meters) wide is 120 square feet (11.1 square meters).
Consider the CADR (Clean Air Delivery Rate): Your air purifier’s CADR should be roughly two-thirds of the room’s square footage. For a 150-square-foot (13.9-square-meter) room, aim for a CADR of at least 100. This calculation is based on 5 Air Changes per Hour as follows. 150 ft2 x 8 ft = 1,200 ft3 x 5 ACH = 6,000 / 60 minutes in an hour = 100 CFM or 100 CADR.
Account for ceiling height: Standard CADR is based on 8-foot (2.4-meter) ceilings. For higher ceilings, opt for a higher CADR rating to account for the additional air volume. See section below to calculate higher ceiling area’s, those greater than 8 feet in height.
Step by Step Method to Determine Size of Air Purifier required for Increased Ceiling Heights
Step 1: Calculate Room Size
Measure the length and width of the room in feet (meters).
Multiply length by width to get the square footage (square meters).
Measure the ceiling height.
Multiply the square footage (m2) by the ceiling height to get the room volume in cubic feet (m3).
Step 2: Determine Required CADR
Multiply the room volume in cubic feet (cubic meters) by 5 to get the minimum CADR needed in ft³/m (CFM) or m³/hr. CADR is measured in cubic feet per minute (CFM) or cubic meters per hour (CMH).
For rooms with standard 8-foot ceilings, aim for a CADR that’s at least two-thirds of the room’s square footage, which provides 5 Air Changes per hour and assumes an 8 foot ceiling.
Step 3: Consider Air Changes per Hour (ACH)
Air changes indicate how many times in an hour the volume of air within the room is circulated through the air purifier. The higher the number the greater the times the room air is purified through the machine.
Decide on the desired ACH (typically 3-6 ACH for residential spaces).
Use the formula: 1 ACH = Room Volume (ft3) / 60 Minutes
Step 4: Select Appropriate Air Purifier(s)
Choose air purifier(s) with a combined CADR that meets or exceeds the calculated requirement.
For larger spaces or whole-house purification, consider multiple units to achieve the desired CADR.
Step 5: Adjust for Special Conditions
For rooms with higher ceilings, increase the CADR requirement proportionally.
In areas with higher pollution levels, opt for higher ACH (up to 12 for very polluted spaces).
By following these steps, you can determine the appropriate number and size of air purifiers needed for effective air cleaning in your space.
Efficiency Tips
Regular maintenance: Clean and replace filters as recommended by the manufacturer.
Consider wall-mounting: For space-saving and increased efficiency, consider wall-mountable models.
Monitor performance: Some advanced air purifiers offer features to measure air quality and adjust performance accordingly.
By following these air purifier placement tips, you can ensure your air purifier operates at peak efficiency, providing cleaner, healthier air throughout your home or office. Remember that the optimal placement may vary depending on your specific space and air quality needs, so don’t hesitate to experiment with different locations to find what works best for you.
Frequently Asked Questions
Q: What does an air purifier do?
A: An air purifier helps eliminate contaminants in the air, including bacteria, mold, viruses, odors, dust, pollen, and other pollutants.
Q: How does an air purifier work?
A: Air purifiers typically use a combination of technologies, including HEPA filters to trap particles, activated carbon filters to absorb odors and chemicals, UV-C light to destroy pathogens, and ionization to actively hunt down contaminants.
Q: How much space can an air purifier cover?
A: Portable air purifiers for single rooms typically cover areas up to 700 square feet effectively. Whole-house models, which are ducted into your home’s HVAC system, can cover larger areas and multiple rooms.
Q: Do air purifiers use a lot of electricity?
A: No, most air purifiers are energy-efficient. For example, some popular models use less electricity than a 45-watt light bulb.
Q: How often should I change the filters in my air purifier?
A: Filter replacement frequency varies depending on the model and air quality. It’s best to follow the manufacturer’s recommendations and change filters when the indicator light comes on to maintain optimal performance.
Q: Can one air purifier clean the air for my entire house?
A: A single portable air purifier cannot effectively clean the air for an entire house. For whole-house purification, you need a whole-house air purifier installed into your HVAC system.
Q: What is CADR and why is it important?
A: CADR stands for Clean Air Delivery Rate. It measures how quickly an air purifier can clean the air in a room. A higher CADR indicates better performance. The CADR should be at least two-thirds of the room’s area for effective purification.
Q: Can air purifiers help with allergies and asthma?
A: Yes, air purifiers can help reduce allergens and irritants in the air, potentially providing relief for allergy and asthma sufferers.
Q: Should I use both an air purifier and an air filter?
A: Yes, using both is recommended. Air filters handle larger particles, while purifiers can trap and eliminate smaller particles or make them easier for the filter to catch.
Q: Are air purifiers effective against cigarette smoke?
A: Yes, air purifiers with activated carbon filters can effectively remove cigarette smoke and its associated odors. Look for models specifically designed to tackle smoke and chemical pollutants
Air purifier vs humidifier. They’re both devices that enhance indoor air quality, but they serve distinct functions. Understanding their differences is essential for selecting the right one to meet your needs.
Differences Between Air Purifiers and humidifiers
Air Purifiers: Enhancing Air Quality
Air purifiers are designed to remove airborne contaminants, including dust, pollen, pet dander, mold spores, and certain bacteria and viruses. They operate by drawing air through filters—such as HEPA filters—that trap these particles, releasing cleaner air back into the environment. Some advanced models also incorporate activated carbon filters to eliminate odors and volatile organic compounds (VOCs). Regular use of air purifiers can benefit individuals with allergies, asthma, or those living in areas with high pollution levels.
Humidifiers: Adding Moisture to the Air
Humidifiers increase the humidity level in indoor spaces by emitting water vapor or steam. This added moisture can alleviate symptoms associated with dry air, such as dry skin, irritated nasal passages, and respiratory discomfort. They are particularly useful in arid climates or during winter months when indoor air tends to be drier due to heating systems. Maintaining optimal humidity levels (typically between 30-50%) can also help preserve wooden furniture and prevent static electricity buildup.
How Do Air Purifiers Work?
Air Purifiers have various filters. Make sure to check what type of filter comes with your air purifier.
Air purifiers work by pulling air through a series of filters that trap and remove airborne particles like dust, pollen, pet dander, smoke, and mold spores. Most quality air purifiers use a multi-stage filtration system: a pre-filter captures large particles like hair and lint; an activated carbon filter absorbs odors and gases; and a HEPA (High Efficiency Particulate Air) filter removes up to 99.97% of particles as small as 0.3 microns. Some air purifiers, however, use ionizers or technologies that generate ozone as a by-product—which can be harmful to breathe, especially for people with asthma or respiratory issues. To stay safe, it’s best to choose air purifiers labeled as using true HEPA filtration and avoid models that emit ozone
Key Differences Between Air Purifiers and Humidifiers
Function: Air purifiers clean the air by removing pollutants; humidifiers add moisture to the air without filtering out contaminants.
Health Benefits: Air purifiers reduce exposure to allergens and pathogens, benefiting those with respiratory issues. Humidifiers help relieve dryness-related discomforts but do not remove airborne particles.
Usage Considerations: Air purifiers are beneficial year-round, especially in polluted or allergen-prone areas. Humidifiers are typically used during dry seasons or in regions with low humidity.
Can They Be Used Together?
Yes, air purifiers and humidifiers can be used simultaneously to address both air cleanliness and humidity levels. However, they should be placed apart to prevent moisture from the humidifier affecting the air purifier’s filters. Some manufacturers offer combination units that perform both functions, but it’s essential to ensure such devices meet your specific air quality requirements.
Which Is Better? Air Purifier or Humidifier for Common Needs
Which is better for your situation, an Air Purifier or a Humidifier. See chart for examples.
For Babies (Air purifier vs humidifier)
Best Choice: Both (depending on the issue) Air purifiers are ideal for keeping the air clean by removing allergens, pet dander, and airborne pollutants, which is important for a baby’s developing lungs. Meanwhile, humidifiers help maintain proper humidity levels, preventing dry skin, chapped lips, and irritated sinuses—common issues for infants, especially in dry climates or winter. Why: If the air is both dry and contaminated, using both together can offer comprehensive protection.
For Allergy Sufferers (Air purifier vs humidifier)
Air Purifiers are good at removing pollen from the air
Best Choice: Air Purifier Air purifiers with HEPA filters are highly effective at capturing allergens like pollen, dust mites, pet dander, and mold spores. These particles are common triggers for allergies. Why: Humidifiers can actually worsen allergies if they introduce too much moisture and encourage mold growth.
For Coughs or Congestion
Best Choice: Humidifier Humidifiers ease breathing by soothing irritated nasal passages and throats, especially when dry air is the culprit. They add moisture that can thin mucus and relieve congestion. Why: If the cough is due to dryness, a humidifier helps; if it’s from allergens or pollution, an air purifier might also be necessary.
For Winter or Summer
Winter: Humidifier – Indoor heating causes dry air, leading to dry skin, irritated sinuses, and respiratory discomfort.
Summer: Air Purifier – Higher pollen counts and increased pollution during summer make an air purifier more useful.
For Dust, Dust Mites, and Dirt
Best Choice: Air Purifier Dust and dust mite allergens are common and are effectively captured by air purifiers with high-efficiency filters. Why: Humidifiers do not clean the air and can actually increase dust mite populations in overly humid environments.
For Mold or Mildew
Best Choice: Air Purifier Mold spores are airborne and can be removed by HEPA-filter air purifiers. In contrast, humidifiers can unintentionally contribute to mold growth if humidity levels go too high (above 50%). Why: Maintaining balanced humidity is crucial—too much moisture fosters mold, while air purifiers help reduce spore concentration.
For Eczema
Best Choice: Humidifier Eczema flare-ups are often triggered or worsened by dry air, especially in the winter. A humidifier helps maintain skin hydration by adding moisture to the air, which can prevent cracking, itching, and inflammation. Why: While air purifiers may help by removing airborne irritants, a humidifier directly addresses the dryness that typically aggravates eczema. Pro Tip: Keep humidity between 40–50% for skin comfort—too much can cause mold growth and worsen skin issues.
For Pets
Best Choice: Air Purifier Pets shed dander, fur, and other allergens that can trigger allergies or asthma. An air purifier with a HEPA filter can remove these particles from the air effectively. Why: Humidifiers won’t reduce allergens from pets. In fact, excess humidity can make it easier for pet dander to cling to surfaces. Note: If your pet is prone to dry skin (especially in the winter), a humidifier in addition to an air purifier might be helpful.
Cost Differences
Air Purifiers
Initial Cost: $100–$600+ depending on brand and features
Maintenance: Filter replacements every 6–12 months (~$20–$100 each)
Humidifiers
Initial Cost: $30–$200 for most residential models
Maintenance: Regular cleaning and occasional filter changes (~$10–$30)
Air purifiers typically cost more upfront and over time due to filter maintenance, but they offer more long-term benefits for air quality.
Humidifier vs. Dehumidifier: What’s the Difference?
The difference between a Humidifier and Dehumidifier
While humidifiers and air purifiers help improve air quality and comfort, they won’t solve moisture problems caused by excess humidity. That’s where dehumidifiers come in.
What’s the Difference?
Humidifier: Adds moisture to dry air. Best for dry environments or during winter when the air is too dry. Helps with dry skin, chapped lips, irritated sinuses, and static electricity.
Dehumidifier: Removes excess moisture from the air. Best for damp or humid areas like basements or bathrooms. Helps prevent mold, mildew, and musty smells. An air conditioner removes moisture from the air that why it requires a condensate drain.
Got Mold or Mildew? You May Need a Dehumidifier
Mold can be a serious problem so please be careful, especially if its black mold.
If your home has mold or mildew, it’s likely due to too much moisture in the air. This can happen in bathrooms, basements, or homes in humid climates. A humidifier will make the problem worse, and an air purifier will only reduce the symptoms (like mold spores in the air)—not fix the source of the problem.
Only a dehumidifier can remove the excess moisture that allows mold and mildew to grow. It works by pulling in humid air, condensing the moisture into water, and releasing drier air back into the room.
Simple Rule of Thumb:
Concerned about air quality or allergies? → Use an Air Purifier.
Air feels too dry? → Use a Humidifier.
Air feels too damp or sticky? → Use a Dehumidifier.
How Do Air Purifiers Work?
Air purifiers work by pulling air through a series of filters that trap and remove airborne particles like dust, pollen, pet dander, smoke, and mold spores. Most quality air purifiers use a multi-stage filtration system: a pre-filter captures large particles like hair and lint; an activated carbon filter absorbs odors and gases; and a HEPA (High Efficiency Particulate Air) filter removes up to 99.97% of particles as small as 0.3 microns. Some air purifiers, however, use ionizers or technologies that generate ozone as a by-product—which can be harmful to breathe, especially for people with asthma or respiratory issues. To stay safe, it’s best to choose air purifiers labeled as using true HEPA filtration and avoid models that emit ozone
Avoid Air Purifiers that generate Ozone.
Conclusion
Air purifier vs humidifier. Choosing between an air purifier and a humidifier depends on your specific indoor air quality needs. If your goal is to reduce airborne pollutants and allergens, an air purifier is the appropriate choice. If you’re looking to alleviate dryness in the air that can cause skin and respiratory discomfort, a humidifier would be beneficial. In environments where both issues are present, utilizing both devices may provide the best results.
