Best Air Purifiers Reviews and Ultimate Guide 2022

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These Reviews and Buying Guide are the culmination of thorough research of the leading air purifier brands, top models and the technology they use to get more pollution out of the air we breathe. If you’re familiar with Pick HVAC, then you know that our research is complete and our reviews and information are accurate.

The Best Air Purifiers

This list is the best of the best. Overviews and full reviews follow.

How did we compile this list?

We have completed comprehensive Buying Guides for specific air purifier niches: Mold, Dust, Pollen, Allergies, Pets and True HEPA. To complete each of the guides, we did extensive research on air purifiers.

For this Ultimate Buying Guide, we went through our research data again to select the best of the best air purifiers in each size class. Whatever air pollutant or allergen you’re concerned about, these air purifiers are the best available to remove them from the air you breathe.

The truth is, if an air purifier is good for one pollutant or allergen, it will be good for all the others.

Reviews of the Best Air Purifiers

Here are the complete reviews of the best air purifiers for what is bothering you: Mold, pets, dust, pollen, smoke and other indoor air pollution.

All these air cleaners have a True HEPA main filter. True HEPA clears the air of 99.97% of pollutants down to 118 millionths of an inch. See the Buying Guide below for the importance of a True HEPA filter vs. a HEPA-type or HEPA-like filter.

All filter types are discussed in the Buying Guide.

#1 Pure Enrichment PureZone 3-in-1 True HEPA Air Purifier

Small Rooms

This model gets good ratings for removing dust, pollen, pet dander and common household odors from smoke, cooking and pets.

Why it is One of the Best: Thorough air cleaning by trapping pollutants in the True HEPA flooring and killing viruses and bacteria with a UV-C germicidal light. It makes air fresher and healthier.

Filters: True HEPA, activated carbon and UV-C germicidal light.

Top Features:

  • 3 fan speeds
  • 2/4/8-hour timer
  • Dirty filter light
  • UV germ-killing light

Pros: Excellent air cleaning, good value for the money, and a 5-year warranty is among the best available, giving you peace of mind.

Cons: A little bit loud on the top fan speed. That’s a common complaint for all air purifiers. We suggest using that fan speed for thorough air cleaning while you are out of the room or away from home.

Room Size: Up to 200 square feet

Best Use: Great for bedrooms, offices, walk-in closets, nurseries and kid’s rooms, laundry rooms and dorm rooms.

User Reviews: Here’s what consumers are saying:

“I work in an old building that smells musty and dusty. Made me sneezy and congested. This air purifier has made my office a sanctuary of fresh air. I feel 100 percent healthier.”

“Bought it to combat forest fire smoke that’s impossible to keep out of the house. It is doing the job in our bedroom, so we sleep comfortably! Very impressed.”

“Started making a low ‘hissing’ noise after 18 months, but it still filters out cat hair etc. Just can’t figure out how to stop the noise.”

“I have a small daycare with 4 kids. Since starting to use this about a year ago, the children have missed 22% fewer days due to illness than in the previous 5 years. I keep good records! That tells me the UV light is helping to keep germs out of the air.”

#2 Winix 5500-2 Air Purifier with True HEPA and Odor Reducing Washable AOC Carbon Filter

Medium Rooms

Winix uses a proprietary technology it calls PlasmaWave. The unit emits hydroxyls, a near-water molecule that binds with pollutants in the air. The result is that new, harmless molecules are formed, making the air healthier.

Why it is One of the Best: Standard HEPA filtration and advanced technologies are used to remove harmful pollutants, allergens and VOCs from indoor air with outstanding success.

Filters: True HEPA, washable activated carbon filter and PlasmaWave technology.

Top Features:

  • Smart Sensors / Auto Mode that monitor indoor air quality and turn the fan speed up when air quality is poor and down when it improves.
  • Remote control for convenience.
  • 4 fan/cleaning speeds.
  • Sleep Mode with dimmed light.

Pros: A washable pre-filter extends the life of the main HEPA filter. Hydroxyls are known to bond with smoke and break it down into harmless molecules that don’t have that smoky odor. It is certified by Energy Star to be energy efficient.

Cons: PlasmaWave hydroxyl emitter does emit trace amounts of ozone. The ozone level is considered safe for healthy users – in fact, this air purifier is certified by the California Air Resources Board, which has very strict safety rules. And the unit can be run – and still be very effective with the HEPA and carbon filters – without turning on PlasmaWave.

Room Size: Up to 360 square feet.

Best Use: Large bedrooms and offices, living rooms, bonus rooms and kitchens.

User Reviews: Here are the most helpful reviews from verified purchasers.

“There’s a smoker in the house. This unit in my bedroom gives me one place to go where the air is clean and not stinky.”

“My dermatologist told me my splotchy eczema was related to pollen and other allergies and that I should get a Winix air purifier. I did. She was right. My skin began clearing after about 12 days and looks amazing after a month.”

“Three dogs, a varying number of guinea pigs and far fewer allergy symptoms in my daughter since we started running this unit 24/7 in our upstairs where her bedroom is.”

“It emits ozone! If you have asthma, pick a different unit.”

Note: While the amount of ozone emitted is considered safe, we concur that those with asthma might be better off with a non-ozone air purifier. Our runner-up in this category is the Renpho Air Purifier for Pets and Allergies. It does not emit ozone and is highly rated.

#3 RabbitAir BioGS 2.0 Ultra Quiet HEPA Air Purifier

Large Rooms

This Energy Star certified air purifier has won design awards in the US, Germany and Japan. It cleans air efficiently and thoroughly.

Why it is One of the Best: It filters air 4 ways starting with proven True HEPA filtration. The RabbitAir is backed by a 5-year warranty, one of the longest available. The warranty tells you what the manufacturer things of its product.

Filters: True HEPA. Washable/permanent pre-filter for large debris like pet fur. Activated carbon filter works well on smoke and chemical vapors including VOCs. Negative ion ionizer can be turned On/Off as needed.

Top Features:

  • Air quality sensor and Auto Mode to automatically adjust fan speed (can be turned off).
  • 5-speed fan including very quiet lowest setting.
  • Convenient remote control, one of the few air purifiers with a remote.
  • Two other trim colors available.
  • Ionizer (that must be turned on, or it does not emit ions.)

Pros: A washable pre-filter, if you wash it regularly, will keep the air flowing at full capacity through the air purifier while protecting the main HEPA filter from getting clogged. Convenience features like a full-function remote make it so much easier to use an air purifier. This RabbitAir air purifier is backed by a very good 5-year warranty.

Cons: When the ionizer is on, it does produce a very small amount of ozone. The manufacturer says this, “For our BiogS 2.0, an amount of 0.001 ppm (parts-per-million) of ozone was recorded with negative ionizer turned on. That is 50 times less than the 0.05 ppm maximum ozone concentration safety standard set forth by the California Air Resource Board.”

Room Size: Up to 625 square feet.

Best Use: Bedroom suites, large offices, family and living rooms, open kitchen/dining area, small retail shops, small apartments.

User Reviews:

“So much less dust – and dust allergies – in the house since we got the Rabbit Air.”

“Best-looking air purifier available.”

“Light panel can’t be turned off. It’s bright, and changes every time the settings change on auto mode. If you’re a light sleeper, this might wake you up like [it does] me.”

“I live in an old Chicago apartment building that’s very musty in the halls, friends’ apartments etc. This unit has run non-stop for four years, and my apartment smells like new.”

#4 TruSens Air Purifier Z-3000 360-degree HEPA Filtration with Dupont Filter

Extra-large Rooms

This stylish air purifier draws air from 360 degrees for balanced air purifying.

Why it is One of the Best: Several reasons. 1. The sensor is in a remote pod you can place anywhere. This means that the air gets more thoroughly cleaned. When sensors are on the unit, as they typically are, the air immediately surrounding the unit gets cleaned more thoroughly than air far from it.

 This is especially true in a big room – like rooms this model is designed for. Sure, the air eventually evens out, but the remote pod guarantees the appliance keeps running at the appropriate fan speed until all the air is purified.

2. Cleaned air comes out in two directions – top and front – to disperse it better.

Filters: DuPont brand True HEPA, washable pre-filter for pet hair and dust, activated carbon filter for smoke.

Top Features:

  • Remote air quality sensor
  • Auto adjust of fan speed based on pollutants detected by the sensor
  • UV-C germicidal light kills viruses, bacteria and mold
  • 360-degree air intake
  • Dual-direction air outflow
  • LED display allows you to monitor air quality at a glance
  • 4 fan speeds
  • 2/4/8/12-hour timer
  • Portable carrying handle

Pros: The remote pod makes a big difference in a large room. It keeps the unit running at a higher speed until the air everywhere is clean. This unit is loaded with performance and convenience features.

Also, it is available in Small (250 square feet) and Medium (375 square feet) sizes too. If you need a smaller size, select the link and choose the size you want.

Cons: This unit is a little pricey, but you get a lot of performance for the money.

Room Size: Up to 700 square feet.

Best Use: Large bedrooms, bedroom suites, upper floors, living rooms, office space.

User Reviews:

“Spring here. Opened the window near the sensor. Breezy outside. The machine ramped up the air purifier speed in a few minutes. Probably detected pollen. Nice to know it is working.”

“My housemate neglects cleaning the cat litter box. I refuse to do it for her. This unit hasn’t cleared the cat smell after three days.”

“Wildfire six miles west of us, driving air quality index into danger zone. Can’t go outside, and I could smell the smoke indoors too until I started this appliance. It is keeping my small apartment smelling great.”

“Good quality and design. Easy to use. The filter caught a boatload of pet hair in the first week. It’s working!”

#5 Inofia with True HEPA Air Filter, Wi-Fi Control

Whole-House Air Purifier

This unit has one powerful fan that draws air into the unit from two side – with filters on each side. This design allows the innovative Inofia air purifier to clean more air per hour than you’d expect for its size.

Why it is One of the Best: It is effective against a wide range of pollutants and allergens from mold to dander to dust to VOCs and smoke. The WiFi connectivity adds convenience.

Filters: True HEPA plus a carbon filter with a built-in pre-filter for large debris.


  • Air quality sensor that automatically adjusts fan speed
  • 5-speed fan runs from low and quiet to powerful – and pretty quiet at 52db for top speed
  • WiFi and full-function App
  • Dirty filter notification
  • 24-hour timer

Pros: Powerful air cleaning for a large area. WiFi control with an app that has all the functions allows you to monitor and control the unit while away or in another room. The cost is reasonable for one that cleans air in more than 1,000 square feet.

Cons: The warranty is just 2 years. We’d like to see at least 3 years, and prefer 5. Amazon offers 3-year and 4-year warranty extensions for a reasonable price.

Room Size: Up to 1,300 square feet.

Best Use: Apartment, small home, basement, office suite. We also recommend using an “over-sized” unit where smokers are present. For example, use this unit in 500 to 700 square feet to really clear the air.

User Reviews:

“Moved into an apartment that hadn’t been cleaned in years. Cleaned it and replaced carpet with laminate. Turned the Inofia on and after 5 days, the dusty, dank and “old” odors are gone. So is the “new floor” laminate smell which, I suspect, had VOCs.”

“Wi-Fi is sooo convenient!”

“Had connectivity issues for a month until Inofia fixed the WiFi issue. All good now, most of the time.”

“I have the 600 square feet model in a bedroom and it eliminated my allergy symptoms in a week.”

Note on Sizes – Inofia makes models for space from 600 to 1300 square feet. Use the link, and scroll down to the comparison chart for details.

Guide Section

This guide begins with information about air purifiers and then moves on to topics that will help you select the right one for your purposes.

Do Air Purifiers Improve Air Quality & Health?

Is spending $75 to $750 on an air purifier worth the money?

Perhaps this American Heart Association Scientific Statement on Particulate Matter Air Pollution and Cardiovascular Disease from 2010 will help answer the question: It says:

In 2004, the first American Heart Association scientific statement on “Air Pollution and Cardiovascular Disease” concluded that exposure to particulate matter (PM) air pollution contributes to cardiovascular mortality…This body of evidence has grown and been strengthened substantially since the first American Heart Association scientific statement was published [in 2004].

The statement makes clear that indoor air pollution is a serious problem. The Environmental Protection Agency (EPA) has called indoor air pollution a Top 5 threat to health.

A 2015 post from the highly respected Cleveland Clinic gives more detail:

Pulmonologist Rachel Taliercio, DO, notes that air pollution can either cause or worsen respiratory symptoms such as difficulty breathing, cough, and upper airway congestion. But it has also been implicated in heart disease.

Cardiologist Kenneth Shafer, MD, further explains that airborne toxins are irritants. They have chemical compositions that lead to changes in the blood chemistry, which in turn causes adverse health effects.

For instance, recent research found an association between air particulate pollution and carotid artery disease, a condition that can lead to stroke. Another study named pollution as one of the most important risk factors for chronic disease.

Are air purifiers part of the solution?

The evidence makes it clear that, yes, they are.

Dr. Shafer states the obvious, “To the extent that you could eliminate some of those particles in the air and reduce the exposure, you’re going to reduce effects on health.”

The Cleveland Clinic posts continues with, “Many of the potential benefits of using an air purifier are related to the lungs, particularly conditions such as asthma. By filtering out fine particles, purifiers help clean the air you breathe and lessen the potential negative effects of pollution, Dr. Taliercio says.”

“But Dr. Shafer notes that purifiers have been shown to alter the blood chemistry in a way that may benefit heart health, as well.”

Several studies have shown improvements in blood pressure and heart rate after the installation of air purifiers.

That’s very encouraging news!

Who Should Consider an Air Purifier?

Anyone with lung or heart issues should have a quality True HEPA air purifier in their room or home that is properly sized for the space. Later in this Buying Guide, sizing an air purifier is discussed.

The Cleveland Clinic article answers the question this way, “Air purifier users are most likely to reap health benefits in areas with the greatest air pollution, Dr. Taliercio says. That could mean living in a city with poor air quality or near a major source of pollution.”

Or, we would add, in farming areas with large amounts of dust, pollen and chemical use.

Benefits may also be higher in young children, elderly, and people with heart and/or lung disease,” Dr. Taliercio adds.

What Air Purifiers Do Well

Models with a True HEPA filter remove 99.97% of air particulates down to .3 microns.

Did you know? A particle .3 microns is 118 millionths of an inch. Here are sizes for common allergens and other particulate pollution:

A human hair and pet fur can range from 60 to 80 microns.

  • Bacteria are .2 to 3 microns or larger.
  • Dust ranges from .5 to 10 microns or larger.
  • Pet dander (which is the same substance as most dust) is .5 to 10 microns.
  • Mold spores are 10 to 30 microns.
  • Pollen ranges from 15 to 200 microns.
  • Dust mite feces Airpura Air Purifier Control for Heavy Tobacco Smoke
  • Dust mites – 100+ microns

True HEPA filters vs HEPA-type and HEPA-like filters is discussed below.

What They Don’t Do As Well

Gas vapors are much harder to trap. A HEPA filter won’t stop them.

Activated carbon or charcoal is the best defense against smoke, chemical vapors, other VOCs (volatile organic compounds).

According to the EPA, “To filter gases, choose a portable air cleaner with an activated carbon filter or other filter designed to remove gases. Activated carbon filters can be effective, provided that there is a large amount of material used in the filter.”

The Best Way to Get Rid of Smoke, VOCs and More

If smoke is an issue or you suspect high levels of VOCs or other gases, we recommend:

1). Change the activated carbon filter more often than prescribed. If the filter is supposed to last 3 months, change it in a month or six weeks.

2). Consider a commercial-grade air purifier with a huge activated carbon filter. For example, the Airpura Air Purifier Control for Heavy Tobacco SmokeIt contains a whopping 26-pound activated carbon filter. See more about this impressive air purifier for smoke and VOCs in this informative video. 

An ionizer can help: Look for an air purifier with an ionizer that does not emit more than a trace amount of ozone, if any. The negatively charged ions can bond with gas molecules, making them large enough for a HEPA filter to stop.

Hydroxyls can help:Winix air purifiers emit hydrogen-based molecules that also bond with gas molecules and others to form compounds large enough to filter with a True HEPA.

Filters – Essentials and Options

Air purifiers are about filtering impurities from the air we breathe, so filtration is the most important thing about any model you’re considering.

Here are common filter types – all have been mentioned above. But here is more detail.

1. True HEPA Filters

True HEPA filters are great for dust, pollen and other allergens, mold spores, pet dander and similar small pollutants.

These are fiberglass mesh filters. The name stands for High Efficiency Particulate Air (or Arrestance) filters. The filters are made in cylinder and rectangular sizes.

In short, HEPA means the filter very efficiently removes most particulate air pollution – the kind known to causes and worsen heart and lung disease – from the air.

To be labeled True HEPA, the filter must remove 99.97% of particle pollution down to .3 microns. See the information in What Air Purifiers Do Well above for a list of common pollutants and allergens and their size.

A True HEPA filter is vital to clean air. We recommend only considering models with True HEPA.

True HEPA vs HEPA-type and HEPA-like

Only True HEPA filters have been certified to remove 99.97% or particles larger than .3 microns.

The other terms mean that the filter is similar to True HEPA, but the manufacturer hasn’t had it certified because it won’t pass the test!

Alen, a major air purifier brand, makes and uses HEPA-type filters it claims removes 99% of particles down to .3 microns. If you don’t have breathing issues, that might be enough. If you do, or want to be safe, you should buy a True HEPA filter air purifier.

2. Washable Pre-filter

A washable pre-filter is great for large particles that would otherwise clog the True HEPA filter.

These are often plastic, though a few aluminum pre-filters and carbon pre-filters are made.

They are valuable in two ways.

First, they trap large debris like pet fur, human hair and dust clumps, so that those debris won’t clog the HEPA fit and shorten its useful life.

Secondly, they can be washed, dried and returned to the unit. This saves money on buying replacement filters.

3. Activated Carbon or Charcoal Filter

Carbon/charcoal filters are good for odor-causing gases, chemical vapors and other VOCs. The more carbon, the better!

Activated carbon or charcoal is given a negative charge, so that it attracts pollutants to it.

Secondly, carbon and charcoal is porous to begin with. It is then treated to create fissures in the material. These pores and fissures trap tiny molecules including gas and chemical vapor and VOC molecules.

Did you know? One pound of activated carbon or charcoal is so porous it has 1 acre of surface area. That’s 43,560 square feet!

Those are the essentials.

Here are options that can improve air purifier performance in some circumstances.

1. UV Germicidal Light

UV light in the C spectrum (UV-C) and others is used in a wide range of applications to kill germs. It works. We know that.

HEPA filters trap viruses, bacteria plus mold and other fungi. Over time, those organic pollutants can grow and/or cause your HEPA filter to smell bad.

A UV light kills the organic matter, so that it doesn’t grow or begin to foul the True HEPA filter. If you have a busy household and members seem to be sick a lot or if the purifier will be used in a daycare, school or crowded office area, getting one with a germicidal UV light is a good idea.

2. Ionizer

There is both confusion and controversy about ionizers. The biggest issue is – Do they emit ozone?

Most do. A few, like the 3-in-1 True HEPA Air Purifier by Air Choice, use an ozone-free ionizer.

First, here is what an ionizer does. It emits negatively charged ions, also called anions, that bond with pollutant particles in the air. The resulting compound is larger, so it is easier to trap in a HEPA filter. Some of the newly formed particles fall to the floor where they can be vacuumed up. Some cling to walls and furniture, since they are charged, which gets them out of the air.

The danger is that ozone is known to cause irritation to the cells that line breathing passages. It can destroy them – hence the irritation. Prolonged exposure to heavy amounts of ozone can cause severe damage. Most ozone-producing ionizers do not emit severe levels of ozone. However, if you have breathing problems like asthma or COPD or lung disease, then small amounts of ozone can be dangerous.

Read More: The EPA has created a page with links to information on the dangers of ozone-emitting machines.

Winix air purifiers emit hydroxyls, which are believed to be harmless. The hydroxyls bond with pollutants to make them larger and easier to trap. In some cases, the new compound breaks down into harmless molecules. We bring this up because the Winix models emit trace amounts of ozone.

The same is true of the RabbitAir air purifier on our Best of the Best Air Purifiers list. The amount it releases is 50Xs below the level considered dangerous. Even the California Air Resource Board (CARB) has approved the RabbitAir model.

Our recommendation: If you have lung disease, choose a non-ozone air purifier or turn off the ionizer/hydroxy function. In most air purifiers that release ions or hydroxyls, the function must be turned on. We recommend you leave it off.

Fan Speed – The Difference it Makes

Fan speed is cleaning speed.

The higher the fan speed, the more cubic feet of air per minute (CFM) the machine cleans.

There are two approaches to fan speed.

1). Set the fan speed manually to where you think it should be. If the air is smelly or musty, run it on high. When the air smells fresher, turn it down to reduce energy consumption.

2). Buy an air purifier with an air quality sensor that automatically adjusts fan speed to the demand for air purification. The sensor must be turned on for auto mode to work. Then, let the sensitive sensor decide what fan speed is appropriate.

Turbo Fan Speed

A few air purifiers have a top speed that is significantly higher than the next fastest. Most call it Turbo. This feature is designed for quick air cleaning when the air is very dirty. Examples:

  • You come home from work to find windows open – and you’re sneezing/wheezing/coughing because of the pollen and dust that has blown in.
  • The room is filled with cooking smells, a visitor’s heavy cologne/perfume, cleaning solution odors, etc.

Turn on Turbo, and let the machine do its thing.

Our recommendation: We like Turbo mode. But it is LOUD in most models. Consider going to another part of the house while it runs or leaving home for a few hours while it purifies the air.

Size & How to Choose Air Purifier Size

Air purifiers are made to serve spaces from about 160 square feet to more than 1,000. Common sizes are:

  • 200 square feet
  • 300-325 square feet
  • 465 square feet
  • 700 square feet
  • 1,000 square feet

There’s no clear standard what this the room-size rating means. For some, it means the unit will purify all the air in the room 1 timer per hour.

Others advertise that the unit will clean the air in the appropriate room size from 2 to 5 times per hour.

Here is our professional recommendation:

  • If you do not have allergies: Choose a model rated for the space you want it to serve.
  • You have allergies but no pets: Buy a model rated for 25% to 50% more space than you want it to serve.
  • You have pets but no allergies: Again, choose a model with 25% to 50% more capacity than you need.
  • You have allergies and pets: Choose an air purifier rated for 100% larger space.

For example, let’ say the room where you will place the air purifier is 400 square feet. Here’s the situation and the air purifier size you should consider.

400 square foot room:

  • No allergies: Buy an air purifier for 400 square feet
  • Allergies but no pets: Buy an air purifier for 500-600 square feet
  • Pets, no allergies: Buy an air purifier for 500-600 square feet
  • Allergies and Pets: Buy an air purifier for 800 square feet

You should also consider an air purifier rated for larger space than you have if:

You have carpet, especially old carpet, since it harbors allergens and pollutants that are kicked up into the air when you walk on it or vacuum.

There are smokers in the household, even if they don’t smoke in the house.

You live in an apartment and can smell smoke from other apartments.

You fry food a lot or cook other fragrant foods that leave odors lingering in the air.

Your environment is polluted – Urban areas, agricultural areas (pollen, chemicals sprayed on plants) or you live in a very old house/building.

Top Air Purifier Brands & Ratings

Here is an overview of the leading brands and their air purifier lineups.

Brand Sizes Cost HEPA Filters Warranty
Honeywell 80 – 465 s.f. $ – $$$$ True HEPA & HEPA-Type 5 Years
Winix 150 – 700 s.f. $$ – $$$$ True HEPA 1 or 2 Years
Dyson 200 – 600 s.f. $$$ – $$$$ True HEPA 2 Years
Molekule 600 sf. $$$$ HEPA 2 Years
Holmes 85 – 350 s.f. $ – $$ True HEPA & HEPA-Type 3 or 5 Years
Levoit 160 – 710 s.f. $ – $$$ True HEPA 2 Years
Alen 500 – 1,300 s.f. $$ – $$$$ HEPA-Type Lifetime
Germ Guardian 100 – 400 s.f. $ – $$$ True HEPA 3 Years
Medify 165 – 2,400 s.f. $$ – $$$$ True HEPA Lifetime


Honeywell has been making air purifiers longer than most brands.

It offers a good range of affordable and mid-priced models. The key features are:

  • Both True HEPA ($$-$$$) and HEPA-type ($-$$) models
  • 5-year warranties on ALL models
  • All models are certified Energy Star
  • Sizes from 80 to 465 square feet

We rated the Honeywell HPA300 Whole Room air purifier as the Best Overall for Allergies


Winix is a newer brand.

Some models emit hydroxyls to help capture and break down pollutants. Those models do produce trace amounts of ozone.

The PlasmaWave hydroxl function must be turned on, so you can choose not to use it and still get excellent air purifying.

  • All models ($$-$$$$) use True HEPA filters
  • Sizes range from 150 to 700 square feet
  • Warranties are weak – 1 or 2 years

The Winix HR900 Ultimate Pet True HEPA Air Purifier is on our list of the Best Air Purifiers for Pets


The greatest name in vacuum cleaners makes air purifiers too, but its reputation in this market isn’t quite as good.

They’re good, not great, and they either cool the air with a fan or heat it with a heating coil, like a space heater.

  • All use True HEPA filters
  • Cooling ($$$) and Heating ($$$-$$$$) models are available
  • ·Warranties are just 2 years
  • WiFi is available on select models


This unique brand uses proprietary PECO air cleaning. The photo electrochemical oxidation (PECO) unit inside the air purifier collects and breaks down organic particles such as mold and dust mite feces until it is gone.

  • There is one model ($$$$)
  • It is WiFi
  • Rated for 600 square feet
  • Warranty is just 2 years.


Holmes makes a range of affordable and cost-effective air purifiers. They are a good value, especially those with True HEPA filters.

  • HEPA-type ($-$$) and True HEPA ($-$$$) are produced
  • Warranties are 3 years or 5 years depending on the model
  • Room sizes are 85 to 350 square feet

We chose the Holmes True HEPA Air Purifier with Quiet Operation as one of our Best Air Purifiers for large rooms.


Levoit makes an impressive range of air purifiers with good features. Cost is reasonable, so value is good.

  • All models ($-$$$) use True HEPA filters
  • Room sizes are 86 to 710 square feet
  • Warranties on all models are 2 years

The Levoit Smart WiFi Air Purifier for Allergies, Mold, Pollen and Dust w/ Alexa LV-PUR131S was chosen as one of the top True HEPA air purifiers.


Alen sells a lot of air purifiers. They are often “Sponsored” models on Amazon, which means Alen pays to have them placed at the top of the search results.

Most models get good to very good ratings.

  • None of the models ($$$-$$$$) use True HEPA filters, opting for the Alen HEPA-type filter instead.
  • Sizes range from 500 to 1,300 square feet, so these are large room to whole-house air purifiers.
  • Alen backs its units with a Lifetime warranty.

Our Top Picks for Air Purifiers for Allergies includes the Alen FLEX HEPA Air Purifier for Bedrooms & Living Rooms

Germ Guardian

Germ Guardian makes one of the largest collections of air purifiers. It is considered one of the top 5-8 brands.

  • Most models ($-$$$) use True HEPA main filters
  • Most include a UV germicidal light
  • Room sizes range from about 100 to 400 square feet
  • Warranties on most models are 3 years.

Our list of the Best Air Purifiers for Mold includes the Germ Guardian True HEPA Filter Air Purifier UV-C Sanitizer Eliminates Germs, Mold, Odors AC48252PK (2-pack)


Medify uses H13 medical-grade True HEPA filters in most models. The units are pricey, but they do a great job of purifying air of allergens, pollen, smoke and other triggers to asthma attacks.

  • True HEPA plus H13 rating that removes 99.5% of particles down to .1 microns.
  • Room sizes from 165 to 2,400 square feet
  • Lifetime warranty

We rated the Medify MA-40 Home Medical Grade H13 True HEPA for Dust as one of the Best Air Purifiers for Dust.

You’ve come to the end of our Air Purifier Buying Guide! If you started with the Guide, then perhaps you’d like to review our picks for the Best Air Purifiers. The list and reviews can be found at the top of the page.

Have these Reviews and Buying Guide been of help? If so, please pass this page along to your friends using our social media buttons. Thank you!

Written by

Rene has worked 10 years in the HVAC field and now is the Senior Comfort Specialist for PICKHVAC. He holds an HVAC associate degree from Lone Star College and EPA & R-410A Certifications.

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