air purifier

Top 10 Best Hepa Air Purifier to Buy in 2020 from Amazon USA

Reading Time 35 mins

If you are looking for the best air purifiers to keep your home or office ambience clean, fresh and breathable, you have landed on the right page. By visiting the page and staying on it, you have rested your trust on our experts’ assessment and judgment instead of wasting countless valuable hours to bring the best hepa air purifier for your home, which seats well on your distilled priorities and weighed wallet.

The experts at have done in-depth research, incisive analysis and rigorous testing on a wider range of air purifiers to prepare the most detailed LIST OF BEST to educate and guide you on the subject.

As you will go through our air purifier reviews, you will immediately realize that every brand has its own set of unique features and functions to stay apart from the rest of the league. Certain features are more attractive than others and that will help you filter in the best models worth considering for a purchase.

Now, let’s get down to the list of the latest and the most top quality air purifiers for home that our experts have painstakingly curated to cater to your needs for knowledge enrichment and proper assessment.


Product Name

Noise Level

Power Consumption

Buy Now


LEVOIT LV-H132 Purifier with True HEPA Filter


28 Watts


Germ Guardian True HEPA Filter Air Purifier

Gentle White Noise at Night 

53 Watts


PARTU HEPA Air Purifier - Smoke Air Purifiers

38-59 Decibel

12 Watts

levoit air purifier

LEVOIT Air Purifier H13 True HEPA Air Purifiers

24-50 Decibel

45 Watts

winix air purifier

Winix 5500-2 Air Purifier with True HEPA

27.8 Decibel

70 Watts


Coway Airmega AP-1512HHS (AP-1519P) HEPA Air Purifier

24. 4-53. 8 Decibel

80 Watts


Medify MA-25 Medical Grade Filtration H13 True HEPA

52 Decibel at the Lowest Setting

25 Watts

medify medical grade

Medify MA-40 2.0 Medical Grade Filtration H13 True HEPA

52 Decibel

68 Watts

levoit air purifier for home

LEVOIT Air Purifier for Home Bedroom, H13 True HEPA Filter

27 Decibel

40 Watts

germ guardian
Germ Guardian Large Room Air Purifier
    Ultra Quite

70 Watts

Top Selling Hepa Air Purifiers to Look for While Buying

1. LEVOIT LV-H132 Purifier with True HEPA Filter, Odor Allergies Eliminator for Smokers, Smoke, Black

LEVOIT LV-H132 Purifier with True HEPA Filter

About the Company: Levoit is a US company – they are headquartered in California – and one of the most famous air purifier making brands. The company has global presence in China, Japan and Germany.

Contact Information:

Toll-Free: (888)726-8520
Monday-Friday 9:00am – 5:00pm PST

The Levoit LV-H132 brings with it an impressive compact design. Its design introduces a new language of ‘compact look and structural build’ for an air purifier equipped with a True HEPA filter. Interestingly, it continues to remain as the numero uno model on Amazon’s list of the best-selling air purifiers in 2020.

The LEVOIT air purifier for bedroom comes loaded with easy-to-use features into a small frame to ensure powerful purification. It is designed to fit any space in your living area or workplace. The purifier integrates an upgraded motor that delivers greater stability and higher efficiency while assuring users of longer lifespan.

Its 2 light settings allow you to turn on light for a warm ambience and turn it off when you are going to sleep. Its 3-stage filtration mechanism captures large particles, pollen and dust mites. Its activated carob filter sucks smokes along with other bad and irritating odors. The purifier can effectively traps pet dander and therefore, serves as a good choice for your furry companion.

The no-noise maker lets you sleep in peace while continuing to purify air in your room. In fact, noise level below 25 Decibel is the USP of Levoit air purifier. If you are looking for an air purifier within a low price range (under $85.49), this surely makes the right choice for your purchase.

Do you know that HEPA air purifier for home can serve as an after-dinner cleaner? It effectively cleans any lingering food smell from your dinner table and surrounding area. 

Warranty: 1 Year

Salient Features:

  • Product Dimension: 8.5 x 14.5 x 8.5 inches
  • Item Weight: 6.5 Pounds
  • Suitable For: Small to Medium Rooms, Offices and Dorms
  • Power Consumption: 28 Watts
  • Filter Replacement: Once in 6-8 Months
  • Noise Level: Quiet
  • CADR: 110 CFM
  • Superb Performance
  • Well Designed for the Price
  • Small, Sleek and Smart Design
  • Slightly Silent
  • Short Power Cable
  • Higher Filter Replacement Cost

2. Germ Guardian True HEPA Filter Air Purifier for Home, Office, Bedrooms, Filters Allergies, Pollen, Smoke, Dust, Pet Dander, UV-C Sanitizer Eliminates Germs, Mold, Odors, Quiet 22 inch 3-in-1 AC4825

Germ Guardian True HEPA Filter Air Purifier for Home

About the Company: Germ Guardian is a USA-based company offering a full range of leading-edge home appliance solutions to ensure healthy, comfy and happy living for people. They have brought out several innovative and effective home air purifiers, most of which make it to the list of top selling products across the USA.

Contact Information:


MON – FRI 8:30 AM – 4:30 PM, EST

Hours are subject to change due to holidays



Another easy-to-afford model (available under $90) from a reputed brand!

The filter screams out a ‘SMART’ look in ‘SIMPLE’ frame. The compact design steals the show. It performs too! Equipped with a True HEPA filter and an optional UV-C light, the air purifier destroys viruses and other germs, filters unpleasant odors and captures allergens. In fact, it is capable of removing 99.97% of harmful elements such as, pollen, pet dander, mold spores, germs and other allergy-causing components as small as 3 microns from the air.

Undoubtedly one of the best Germ Guardian True HEPA filter air purifiers in the US, it’s customizable with 3-speed settings according to your needs of crispy and comfortable air flow in your room. Each filter is intelligently designed to go with a specific unit style.

Pre filter captures pet hair, dust and other large particles while stretching the life of HEPA filter. Its activated charcoal filter helps in eliminating unwanted odors from smoke, cooking fumes, pets and more. Switch to the lowest settings for noise-free air purification when it’s time to go to bed.

Its genuine replacement parts are easy to fit just and designed with combination technology to allow you to make the most of it for fresh and refreshed air. Without shades of doubt, it’s one of the smart air purifiers for home and offices as well as the top selling models in the United States of America.

Warranty: 3 Year Limited Warranty that does not apply to bulb or filter

Salient Features:

  • Product Dimension: 9 x 5.5 x 21.5 inches
  • Item Weight: 7 Pounds
  • Suitable For: Medium to Large Rooms, Offices 
  • Power Consumption: 53 Watts
  • Filter Replacement: Once in 6-8 Months
  • Noise Level: Gentle White Noise at Night 
  • CADR: Pollen (125), Dust (118) and Smoke (108)
  • Excellent Performance
  • Best Value
  • Small Window at the Top
  • Distracting Blue Light
  • Air Outlet Issue
  • Little Bit Noisy at the Highest Settings

3. PARTU HEPA Air Purifier – Smoke Air Purifiers for Home

PARTU HEPA Air Purifier

About the Company: Partu is a China-based micro air purifier brand. All of the air purifiers designed by the company are certified by the California Air Resources Board (CARB), which ensures safe ozone emission.

Contact Information:

Not Available

The no-ozone PARTU HEPA air purifier arrives in a SMART and SHINY black housing. It features a HEPA filter that eliminates 99.97% of allergens. The purifier effortlessly absorbs pet dander, allergies as small as 0.3 microns.

It’s user-friendly and customizable. The model delivers excellent performance without making any noise. It’s 100% safe to use and can function as a fan as well.

Furthermore, it’s a home air purifier with fragrance sponge. Its fragrance sponge keeps your air fresh and fragrant. The air purifier spreads pleasant fragrances and sucks unpleasant odors. Fragrance Sponge and Lock Set are the big USPs of this home air purifier.

Warranty: 2 Years

Salient Features:

  • Product Dimension: 7.5 x 7.5 x 13.8 inches
  • Item Weight: 3.25 Pounds
  • Suitable For: Small Rooms
  • Power Consumption: 12 Watts
  • Filter Replacement: Once in 3-6 Months
  • Noise Level: 38-59 Decibel
  • CADR: No CADR Rating
  • Compact Design
  • New Technology Lock-Set
  • Three Fan Settings
  • 3-Stage Filtration
  • Fragrance Sponge
  • Silent Performer
  • Lock Set
  • HEPA Status Unclear
  • No Auto Mode

4. LEVOIT Air Purifier H13 True HEPA Air Purifiers for Home Allergies and Pets Hair

LEVOIT Air Purifier H13 True HEPA Air Purifiers

About the Company: Mentioned Earlier

Contact Information: Mentioned Earlier

Levoit is a visionary. The brand brainstorms ideas and blends those with their imagination to introduce out-of-the-packs and best-of-the-packs models to curate a space of good health and happiness at your home.

This LEVOIT True H13 HEPA home air purifier model is certified by Energy Start for its excellent energy efficiency that meets stringent energy efficiency standards in place by the US EPA. With a legible noise level, the air purifies keeps your air crispier without keeping you awake.

The filter functions with a 3-tier filtration system working harmoniously. The model arrives with an Original Filter, a Pet Allergy Filter and a Toxin Absorber Filer. In addition, the model is also equipped with a MB filter. The Check Filter Indicator notifies you about the right time for filter replacement. 

It allows you to switch off the LED display lights at night to catch sound sleep without getting disturbed by light. It’s an easy-to-operate home air purifier for healthy home and one of the top selling products throughout the USA. The product is highly reliable and durable. In fact, ultra-long life is the USP of this Levoit model. 

Warranty: 1 Year Warranty Extendable by One More Year

Salient Features:

  • Product Dimension: 8.7 x 8.7 x 14.2 inches
  • Item Weight: 8.9 Pounds
  • Suitable For: Large Rooms
  • Power Consumption: 45 Watts
  • Filter Replacement: 6-8 Months
  • Noise Level: 24–50 dB
  • CADR: Smoke 141/ Dust 140 / Pollen 145 CFM
  • Energy Star Certified
  • CARB Compliant
  • 3-Stage Filtration
  • Check Filter Indicator
  • Ultra Long Life Span
  • Energy Efficient
  • Nearly Silent Air Cleaner
  • A Little Bit Heavier Compared to Many of Its Rivals

5. Winix 5500-2 Air Purifier with True HEPA, PlasmaWave and Odor Reducing Washable AOC Carbon Filter

winix air purifier

About the Company: The South Korean company was established in 1973. The brand designs and develops innovative and sustainable solutions to serve air purifying needs of your home and office.

Contact Information:

Telephone: +31 (0)20 363 21 07


The WINIX 5500-2 Air Purifier is designed to trap pollen, pet dander, dust, mold spores and smoke. It is even capable of absorbing unwanted household odors. The air cleaner integrates a 3-stage air freshening system and features an easy-to-wash Advanced Odor Control Carbon filter.

The Winix Air Purifier with true HEPA model delivers 99.97% efficient performance on strength of WINIX PlasmaWave Technology and a True HEPA Filter. The air cleaner continuously functions at a speed – low, medium, high and turbo – that you can easily choose.

PlasmaWave Technology is its USP. The technology functions at a molecular level to break down allergens, odors, chemical vapors and other indoor contaminants without producing Ozone or any harmful byproducts.

Select Low or Medium for near silent performance and switch to High or Turbo for optimum cleaning and air flow. Smart sensors allow the device to monitor the air in your room continuously. The LED indicator uses a scale – GOOD to POOR – to show the indoor air quality. The model can easily and automatically adjust its fan speed for optimal cleaning.

It’s one of the top selling air purifiers on Amazon. The air cleaner arrives with a Filter Replacement Indicator LED that illuminates when the filter needs a replacement. The big hitch is its high price point – $147.19 – but that is what you have to pay for high-end technology and top-notch performance.

Warranty: 1 Year

Salient Features:

  • Product Dimension: 15 x 8.2 x 23.6 inches
  • Item Weight: 15.4 Pounds
  • Suitable For: Medium to Large Rooms
  • Power Consumption: 70 Watts
  • Filter Replacement: Once a Year
  • Noise Level: 27.8 Decibel   
  • CADR: 243 Dust/ 232 Smoke/ 246 Pollen (CFM)
  • Impressive Design
  • Innovative Technology
  • Overall Satisfactory Performance
  • Foul Odor
  • Electromagnetic Interference (from Some Electronic Appliances) Responsible for Product Malfunctioning

6.Coway Airmega AP-1512HHS (AP-1519P) HEPA Air Purifier

Coway Airmega AP-1512HHS (AP-1519P) HEPA Air Purifier

About the Company: Coway Airmega is a Korea-based top consumer and household electronics company. Established in 1989, the company is known for its premier and innovative home appliance solutions. They have one of the largest R&D centers, with more than 250 dedicated researchers working in state-of-the-art infrastructure.

Contact Information:

Toll Free Number: 1800-102-6960

+91 9974 204 939


This COWAY Airmega HEPA air purifier is small in size but not in power. Powered by 3-stage filtration mechanism, the air cleaner combines an activated charcoal filter, a HEPA filter and a pre-filter to lessen contamination in air.

The device also comes with a filter-replacement indicator and energy-saving mode. Furthermore, its air quality indicator functions continuously to sense air particles in indoor environment and can automatically adjust the fan speed accordingly to remove particles.

The model works with Alexa, allowing the users to ask Alexa about changing the fan speed or indoor air quality. The Alexa enabled home air purifier by COWAY lets you set up smart recorders for filter replacement via Amazon Dash Replacement. The technology allows you to enjoy full freedom to control the air purifier anytime, anywhere.   

The Coway’s pollution sensor displays real-time indoor air quality. The colored LED displays how clean or dirty your indoor air space is every minute of the day. It’s one of the best selling air purifiers in the market across the USA.

Coway IoCare Mobile App offers a wide range of unique features including real-time air qualify notification, filer lifetime scheduler and monitoring. Coway IoCare Mobile App and Alexa-compatible instructions are its USPs.

Warranty: 6-Month Supplier-Backed Warranty

Salient Features:

  • Product Dimension: 22.5 x 22.2 x 12.4 inches
  • Item Weight: 19.8 Pounds
  • Suitable For: Large Rooms
  • Power Consumption: 80 Watts
  • Filter Replacement: Once a Year
  • Noise Level: 24. 4-53. 8 Decibel
  • CADR: 246 Dust/ 233 Smoke/ 240 Pollen (CFM)
  • Innovative Design
  • Top-Notch Performance
  • Smart Features and ECO Mode
  • App Receiving Multiple Bugs
  • A Bit More Expensive

7. Medify MA-25 Medical Grade Filtration H13 True HEPA for 500 Sq. Ft. Air Purifier

medify 1

About the Company: The US-based company is dedicatedly working to offer world-class and new-age solutions for the most healthy air purification treatment at both home and offices. They are also busy spreading awareness and crisis with respect to safe, healthy and innovative air purification systems.

Contact Information:

Tele: 302-603-1450


Media MA-25 is the latest entry in an increasingly competitive industry for the US-based air purifier companies. The company introduces a HEPA filter-fitted air cleaner with an affordable price tag. The model features a smart and compact design carrying a unique signature style that is less likely to face challenge from other air cleaners.

The air purifier features a tempered glass panel – which is very similar to what we see in mobile phones. Tempered glass panel lends the air purifying model a stylish and shiny look.

One of the top-rated Medify home air purifiers for medical grade air filtration, it delivers performance beyond excellence.

Warranty: Lifetime Warranty

Salient Features:

  • Product Dimension: 13.5 x 8 x 8 inches
  • Item Weight: 15.5 Pounds
  • Suitable For: Extra Large Rooms
  • Power Consumption: 25 Watts
  • Filter Replacement: 3-4 Months
  • Noise Level: 52 Decibel at the Lowest Setting
  • CADR: 250 CFM
  • CARB, Energy Star & ETL certified
  • Attractive and Sophisticated Design
  • Compact Prowess
  • Top-Quality HEPA Filter (99.97% Efficiency)
  • Excellent Glass Feeling
  • Innovative Touch Panel, Glass Top and Beveled Edges
  • Comfort of Silence or Power of Performance
  • Dimmable Light
  • Two Filters
  • High Filter Replacement Cost
  • Absence of Smart Sensor

8. Medify MA-40 2.0 Medical Grade Filtration H13 True HEPA

Medify MA-40 2.0 Medical Grade Filtration

About the Company:  Mentioned Earlier

Contact Information: Mentioned Earlier

Made of sophisticated plastic with perfectly shiny finishing, the model looks and feels premium. Wrapped around true HEPA filtration technology, the compact model – one of the top-tier Medify home air purifiers for large rooms – delivers 99.97% efficiency in removing particles as small as 0.3 microns to make inside air of your house cleaner and healthier.

The device is convenient to install, use, move and maintain. Furthermore, its filter is easy to install. The compact model comes with a pre-filer layer to protect its main HEPA filter. Pre-filtration removes fibers, hairs and other large particles such as dander.

Its carbon filter removes some, formaldehyde and other toxic and unwanted odors. The optional anion generator generates negative irons to charge particles and capture them inside the model in order to give a fresh feel of healthy air. You can choose to turn it on or off.

Salient Features:

  • Product Dimension: 10.5 x 11 x 26 inches
  • Item Weight: 15 Pounds
  • Suitable For: Large to Extra Large Rooms
  • Power Consumption: 68 Watts
  • Filter Replacement: 3-4 Months
  • Noise Level: 52 Decibel
  • CADR: 330 CFM
  • New-Age and Futuristic Design
  • Easy-to-Use Touchscreen Panel
  • H13 True HEPA Filter
  • Excellent Filter Life
  • 3-in-1 Filter Pack
  • Honeycomb Activated Carbon filter for Odor Removal
  • Ion Generator That Produces No Unwanted Smell
  • Filter Replacement Indicator
  • Easy to Move and Maintain
  • Night Mode to Switch off Unwanted Lights
  • Child Lock Features
  • No App or Remote Control
  • A Little Bit Noisy on Top and Medium Speed
  • Expensive Filter Replacement

9. LEVOIT Air Purifier for Home Bedroom, H13 True HEPA Filter for Extra-Large Room, Air Cleaners for Allergies and Pets, Mold, Pollen, Dust, Smoke and Odor Eliminator, Auto Mode and Timer,LV-PUR131

LEVOIT Air Purifier for Home Bedroom

About the Company: Mentioned Earlier

Contact Information: Mentioned Earlier

Highly obsessed with a cleaner, healthier and happier indoor ambience for you and your loved ones, the manufacturer has unleashed a super stylish, ultra quiet and high-end performer to fit your bedroom, living room and even office.

If you are looking for one of the best-selling LEVOIT air purifiers to remove bad odors, don’t look beyond this model.

Arriving with a 3-tier filtration system that includes a true HEPA filter, pre-filter and highly efficient honeycombed activated carbon filter, the air cleaner can drive out 99.97 of dust particles, allergens, bacteria and unwanted odors.

The home air purifier with 3 stage filtration system is a perfect pick for people sensitive to air purity or those suffering from seasonal allergies. It also serves the purpose of pet owners, elderly citizens, children or anyone wanting highly breathable air quality.

Warranty: 1 Year

Salient Features:

  • Product Dimension: 14.5 x 7.2 x 18.5 inches
  • Item Weight: 11.24 Pounds
  • Suitable For: Extra Large Room
  • Power Consumption: 40 Watts
  • Filter Replacement: 6-8 Months 
  • Noise Level: 27 Decibel
  • CADR: 230 CFM
  • Sophisticated Design
  • Smart Look
  • Study Build
  • Smoke Eater
  • Odors Removers
  • Overall Excellent Performance
  • Energy Saving Model
  • Noisier at Medium/Higher Mode

10. Germ Guardian Large Room Air Purifier, HEPA Filter, Large Rooms, Filters Allergies, Pollen, Smoke, Dust, Pet Dander

Germ Guardian large room air purifiers

About the Company: Mentioned Earlier

Contact Information: Mentioned Earlier

The 4-in-1 air cleaner is designed to eliminate up to 99.97% of harmful pollen, pet dander, dust, mold spores and allergens from the air. Its UV-C light destroys airborne viruses and lessens volatile organic compounds.

Its pre-filter captures pet hair, dust and other large particles, thereby adding to the lifespan of the HEPA filter. Germ Guardian air purifier for home and offices is capable of absorbing bad odors. In a word, it’s a gem of a product that brings you good value for your money.

Extended warranty period is its USP.

Warranty: 5 Year Warranty

Salient Features:

  • Product Dimension: 9.1 x 6.7 x 27.6inches
  • Item Weight: 11 Pounds
  • Suitable For: Large Rooms
  • Power Consumption: 70 Watts
  • Filter Replacement: 6-8 Months 
  • Noise Level: Ultra Quiet
  • CADR: Dust (114) Pollen (127) and Smoke (108)
  • Stylish and Powerful
  • Excellent Performance
  • Fire Replacement Reminder
  • Not Noisy
  • Air Inlet Vent at the Model’s Backside

At this point, let us tell you the best-selling air purifiers in the US market are easily available on Amazon. You can specify the price range to narrow your search for the top-rated products belong to a specific price category.

Buy on Amazon to get attractive discounts on tagged prices and other offers.

Air Purifier Buying Guide

What does an air purifier do?

The name is self-explanatory. An air purifier removes impurities and pollutants in the surrounding area. Smoke, dust, chemicals, dander and odors are some most common indoor pollutants. According to some valuable and voluminous studies, indoor air is five times more polluted than outdoor air. That necessitates purchasing an air purifier for your home.

How does an air purifier function?

If you want to buy air purifiers for clean air and breathe easy, you should know how its two major components – Filter and Fan – work. Some purifiers feature only single filter whereas the rest have more than one. Fan sucks the air and pulls it out. After the air purifier is switched on, fan will take in air that will keep moving through the filter, thereby resulting into all the impurities and pollutants being removed in the process and clean air released into the surroundings.

Filters in the air purifiers are usually made of paper, fiber or mesh. Irrespective of the filter type, it must be cleaned regularly and properly, otherwise its efficiency and performance will suffer a lot. Therefore, both upfront and maintenance costs should be taken into consideration while purchasing an air purifier.

How to choose a good air purifier?

An air purifier purifies the indoor air, thereby yielding great benefits for your health. As options are galore, buying a purifier without having adequate knowledge about it makes the chance slimmer for your laying hands on the right model subject to your assessed needs and budget. These days, most air purifiers integrate TRUE HEPA Filter. We will explain the feature in this section to help you make an informed choice.

Looking for a home air purifier online? Followings are some importent criteria to keep in mind.

1. Is an air purifier a must-purchase home appliance?

It all depends on if you have any of the followings clustered below:

  • Symptoms of allergies (chronic or seasonal)
  • Unfounded reason for asthma attacks
  • Renovation work going in and around your house
  • Catching cold and cough quite often
  • Feel of nausea due to paint and dust fumes
  • If disinfection is the needed action against bacteria
  • Having pets that shed dander or if they are causing foul smells
  • If you or any in your family smokes

2. Air Purifier Varieties

Requirements vary from person to person. Some people need it just for a single room whereas the rest may need purification for their entire house. Based on this second most important factor, you will find three types of air purifiers to suit your particular needs.

Portable Air Purifiers

Also called as room air purifiers, this type is perfect solution for your single room-based air purification needs. Without any additional heating or cooling system, they are easy to carry from one room to another. Some of this type can run all day long, depending on the capacity. They are available in a variety of sizes. Small ones are perfect for cars whereas medium to large varieties are perfect for homes.

Whole-House Air Purifiers

If you have allergy issues or are looking for air purifiers for large room, it’s the most suitable choice for you needs. Unlike room purifiers, this variety can be connected to heating or cooling system. Furthermore, they can extend lifespan of HVAC by removing all impurities that can negatively affect its performance. This type can improve air quality immediately after being switched on.

Commercial Air Purifiers

These purifiers are perfect for very large spaces such as, lounges, long halls, offices, warehouses and malls. They have high capacity and are capable of removing 99% of pollutants. Commercial air purifiers have high-end filters that can eliminate more harmful chemicals and bacteria. These air purifiers can deal with fumes, tobacco smoke and dust.

3. Filter Type

Based on their capacity and competence to remove impurities, filters come under three categories. Each of these comes with a distinct set of pros and cons. That is why, some manufacturers integrate 2-3 filters in designing to step up filtration capabilities. Following is the detailed information about each type:

Pre-Filter: This type traps pet dander and large dust – a feature that effectively expands the lifespan of main filter. Most pre-filters are easy to wash. You can reuse an air purifier with washable filter times and again and even for your lifetime.

True HEPA Filter: It is the highest quality air filter that comes with the best kind of air purifier. The United Sates Department of Energy (DOE) has strict guidelines in place, which make it mandatory for the filters to trap 99.97% of particles as small as 0.3microns in order to carry on the level. A true HEPA filter must be replaced every 6 months to 1 year.

Full form of HEPA is High Efficiency Particular Air. The term is used to describe filters capable of trapping 99.97% of particles as small as 0.3 microns. Though development of HEPA filters can be traced back to World War II, its standard certification process was established only in 1983 when the American scientists working on the Manhattan Project developed the first HEPA filter to trap radioactive particles released from atomic bomb creation.

One might wonder why 0.3 micron is mentioned in describing function and efficiency of HEPA filter. The scientists use the term as MPPS that stands for Most Penetrating Particle Size. Researchers have found that particles as small as 0.3 microns escape air filters more than larger or smaller particles.

HEPA filters are made of interlaced glass fibres twisted and turned in multiple directions to develop a fibrous maze. As soon as particles navigate the web, they are filtered out of circulation in the following ways:

  • Direct Impaction
  • Sieving
  • Interception
  • Diffusion

Ionic Filter or Ionizer: This filter produces negative ions to charge dust, pollen, bacteria and other small particles and collect those into a plate.

Activated Carbon or Charcoal Filter: Carbon filter air purifier for home can easily absorb odorous gases and particles. Therefore, it can easily eliminate fouls produced by pets, cooking, chemicals and smoke.

UV-C Light: The Ultra Violet light rays sterilize bacteria and virus and kill them. However, the UV rays cause no harm to humans.

Advanced BioGS HEPA Filter: Introduced by Rabbit Air, it’s a high-end technology that extends the lifespan of the main True HEPA filter.

Permanent HEPA Filter: Launched by Hamilton Beach, this technology utilizes vacuum cleaning method to clean the HEPA-type filter, thereby relieving you of having to replace your filter frequently.

HEPA-Type Filter: It is a version of a True HEPA filter but lower in quality. This type does not meet the standards set by the U.S. DOE. The best HEPA air purifiers come at a high price point but they are worth your painstakingly saved money. 

4. Room Size

Always keep in mind the size of your room before choosing an air purifier. Compare the area of your room to the power of purifier for best buy air purifiers for your sweet home. Capability of every air purifier is explicitly mentioned on its package.

5. Clean Air Delivery Rate

CADR refers to how quickly an air purifier is capable of cleaning the impurities in the air. If effective performance is your priority, make sure that the filter has a rating of 300 or above.

CADR Rating according to room size = The area (in square feet)/1.55

6. Air Change per Hour

If you or any of your family members has asthma or allergies, always make sure to check this feature. ACH refers to how many times an air purifier is capable of filtering the inside air in the room every hour. Any good air purifier must feature an ACH of 4 or more. Usually 6 or 8 mean that the home air purifiers reduce allergies and asthma significantly. .

7. Placement

The right placement ensures improved functioning of your air purifier. Wherever your air purifier is installed, make sure that there are 18 inches of free space around; otherwise, there will be much of interference with air flow. Most air purifiers are designed to suck air from all the sides. Therefore, if installed against wall or any object, it will definitely hamper its performance.

8. Filter Replacements

In addition to upfront cost, filter maintenance and replacement costs are also worth considering while making a purchase. If a particular model features 2 different types of filter, you might want to replace them individually at different times.

Lifespan of a filter depends on air quality and usage as well. HEPA and Carbon filters need more frequent replacement. If you buy a home air purifier with true HEPA filter or a carbon filter, check the brand’s instructions on time deadline of filer replacement. Usually they last for 3-12 months, depending on the usage.

Ionic filters have a longer lifespan and require little maintenance. These filters are washable and so, reusable. They don’t suffer degradation easily and make a very cost-efficient choice.

9. Energy Consumption

Proper functioning of air purifier depends on uninterrupted flow of electricity. Therefore, you need to give some thought to how much you can afford on your power bills. Following is a simple formula to calculate power consumption of a filter:

Volts x amps = watts.

Therefore, power consumption per day = Watts x hours / 1000

Home air purifiers with energy rating help you understand how much such a purchase will add to your power bills. Make sure to check the energy star rating when buying an air purifier. The higher the rating, the lower the consumption!

10. Noise Levels

Fan-fitted air purifiers create lots of noise. The higher the speed of the fan, the higher the range of noise! Usually, purifiers having carbon or HEPA filters function more efficiently. Most of these have 2-level speeds – high and low. Some top-notch performers even arrive with 5 speed levels including low, high, medium, automatic and turbo. If you plan to install an air purifier in your bedroom, make sure to pick up a less noisy model.

11. Pack of Add-Ons

In addition to essential features, some purifiers come with a box of additional features to ease up functioning and deliver a far better performance. But keep in mind these feature also make a particular model pricier as well. The additional features to consider prior to buying air purifiers include:

  • Casters
  • Pre-Filter
  • Fan Speed
  • Remote Control
  • Digital Controls
  • Carrying Handles
  • Air Quality Sensors
  • Programmable Timer
  • Antimicrobial Treatment
  • PlasmaWave Technology
  • Filter Replacement Indicators
  • Photo Catalytic Oxidation (PCO)

Some filters come with Mobile App and Nightlight – other two exciting additional features.

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12. Brand Name

Maintaining high quality in product performance and customer care service is signature of any big brand. Trusted names in the market are worth your trust. Still, you should check out the reviews of any model – even it comes from an established brand – before making a buy.

13. Price

For the high-heeled buyers, it’s not a hitch but for the rest, a big hiccup! If you chance upon a product that nicely combines great performance and competent price, go for it. Some affordable home air purifiers for family wellness at home are capable of eliminating carcinogenic formaldehyde. They make a good choice for both your purpose and pocket. If they have a set of other important features, don’t mind a little more spending. However, if budget is not a constraint for you, options are not confined to a few.

14. Warranty

Some purifier models have 1-year warranty whereas others offer up to 5-year warranty. Check out what parts are covered by the warranty. With this, you will be able to get free repair service or replacement if the product has any defect.


1. How much space does an air purifier take?

Air purifiers can easily fit any small or large space. Measure the area of your room in square footage. Next consider both ACH and CFM requirements. Usually the manufacturer recommends the size of the room to get the maximum benefits from whatever you consider the best air filter for home.

2. Is an air purifier safe to use?

All air purifiers – except one type – are safe to use. The exception comes in form of ozone emitting air purifiers. This particular type can cause allergies, chest pain, cough, irritation and even increase your respiratory problems. HEPA purifiers are ozone free and high-end products. Iconic air purifiers also make a good option.

3. Where should I install my air purifier?

Most of the air purifiers available in the market – from high-end to mediocre – are designed to clean air of only one room. Therefore, the most common recommendation is to place it in a room where you spend most of the time. That means, bedroom is the ideal place for air purifier installation. However, if you run an office from your home, install the purifier in that room where you usually stay for more than 8-9 hours.
So, you see not all consumers have the same common goal. You should choose from the personal air purifiers with wheel at their bottom so that you can easily carry it from one room to another as per your requirements.

4. How often should I use it?

You will find relevant instructions in the manual that comes with the purifier from the manufacturer. Usually it is recommended that you should use your air purifier throughout the day. The first time it will be turned on, make sure to choose the highest settings before switching it to ‘Automatic’ after a few hours. The purifier will automatically adjust. However, if you are pretty confident that air in the room where the purifier is placed is clean and fresh, you can set the machine to the lowest setting as it will continue to keep the air space clear.

5. How many purifiers should I purchase?

Usually, you won’t require more than one or two air purifiers for your home. The best choice is to place one in your living room and install another in your bed room. These two rooms are most used spaces in your house. Even the best air purifier consumer reports suggest that no air purifier is powerful enough to keep the air space between two rooms clean. If you have any such space in your home, you should install one air purifier in each room to get good results.

6. How do I know when to change the filter?

Most of the products have an indicator light to alert the users about the time for a replacement. The feature is really convenient for the users. Unfortunately, some purifiers don’t have this feature. If you buy an air purifier that does not come with an indicator, check the manual to know how frequently you need to change the filter. The time gap usually varies from three months to one year.

7. Is it difficult to replace the filter of your air purifier?

It’s a common misconception that replacing a filter is extremely difficult whereas the truth is nothing can be easier than that! Remove the front plate of your purifier and the filter will be clearly visible to you. However, some purifiers have a filter at their backside or at either of the sides. Regardless of the variation, changing filter is not a rocket science. Furthermore, you won’t have to use any special skill or tool for the purpose. However, if you encounter any problem, go through the manual to find out the procedure.

8. Should I close the windows while using my air purifier?

Air purifiers are engineered in such a way that they produce maximum efficiency only in a closed room. The air purifiershelp to eliminate smoke, dust, pollen, pet dander and other contaminants from air. If you keep the windows of your room open, the polluted air from the outside will contaminate the purified air inside the room. The purifier will continue to eliminate the contaminants from the air as long as it detects impurities.
As a result, despite having an air purifier, you will not be able to breathe in clean air. Therefore never keep your windows or doors open as long as your purifier is working as it interferes with the function of the machine and also puts heavy burden on the same.

9. Can air purifiers remove asbestos?

That’s a good question. Presence of asbestos in the air is known to cause some chronic illnesses. However, depending on your priority, chose from the HEPA home air purifiers to buy. Asbestos particles can range from 0.7 to 910 microns in size and HEPA filters are designed to eliminate 99% of them.

10. How should I clean my air purifier?

Cleaning an air purifier is very easy. If you face any problems, check out the manual for instructions. As your air purifier is an electronic device, it needs to be unplugged before cleaning. Clean the exterior of the case with a clean cloth. Slowly remove the filter cover and next, remove the filter. Use water and soap to clean the filter. Let it dry and put the cleaned filter back into its case. Install the external cover and plug in. You are done with cleaning!

12. Can it be good for COPD patients?

Yes, the air purifiers kill the airborne pollutants known to cause lung problems and thus, make it easier for the COPD patients to breathe in. But only the HEPA filter-fitted high efficiency air purifiers for home and officescan serve the purposes of COPD patients. But never buy an ionizer as the ions will aggravate the COPD problems.

13. If an air purifier company advertises that their air filter can capture 99.9% of small or large particles, does it mean the product is good?

Not necessarily. If a filter is capable of trapping 99.9% of large particles, it never guarantees that the product can suck up ultra-fine ones. Similarly, a filter that claims to capture the smallest of polluting particles does not tell you how it traps the particles as small as 0.3 microns.

Parting Words

Air purifiers are meant for healthy and happy living. With the level of pollution shooting up at a worrying and warning rate, an air purifier is no longer a luxury but an essential purchase for every modern household, particularly in urban areas. You should have a fair share of collective responsibilities to keep the air of your locality clean as well as make efforts to keep the air inside your house clean and fresh.

Options are literally endless but not all are equally efficient. That’s why we have prepared our list. Go through the list times and again and decide what model will be the most suitable option that matches the collage of your listed features and assessed budget range. 

Enjoy healthy living with smart home air purifiers.

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