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8 Best Whole-House Air Purifiers

Last updated September 21, 2021

This post may contain affiliate links.

Author avatar Danny Ashton

Danny as been writing about air purifiers for 10+ years. He is a major fan of home technology, which makes him the perfect person to test and evaluate products for HouseFresh

With families and flatmates currently spending a lot more time under one roof than usual, indoor pollutants have become a much more pertinent issue. So, this is the ideal time to consider a whole-house air purifier. 

Whole-house air purifiers are an excellent way to tackle various issues around the home. They: 

  • Ensure bedrooms are dust-free while you sleep; 
  • Provide fresh air for your new work from home office space;
  • Capture viruses and bacteria from your living space; and
  • Keep cooking odors from the kitchen at bay.

To cover a larger space, you’ll need a purifier that’s up to the task. For a whole-house purifier to work effectively, it needs a powerful fan so that vast quantities of air can be drawn in and distributed. It also needs large filters capable of cleaning the air quickly. 

How well a purifier can do this is measured by the clean air delivery rate (CADR). For a whole-house purifier to reach its optimum CADR efficiency, it’s important to find the right place in your home to position the machine. We advise placing it in-between spaces where you spend the most time and places that produce the most pollutants. 

As well as ensuring each purifier has a high CADR score, we also considered the size of home each machine is capable of cleaning, the pollutants it can combat, and which budget size it is best suited for. We analyzed consumer reports, to see how well genuine users reviewed each purifier’s ability to transform the air quality throughout their home and eliminated any units that didn’t match up.

Be sure to also check out our guide to the best whole house dehumidifier.

1. Alen BreatheSmart 75i

Alen BreatheSmart 75i Large Room Air Purifier, Medical Grade Filtration H13 True HEPA for 1300 Sqft, 99.99% Airborne Particle Removal, Captures Allergens, Bacteria, Mold, in White, Allergies

The Alen BreatheSmart 75i is one of the best whole-house air purifiers for larger spaces, making it especially ideal for those who have open-floor plans. This purifier features a clean air delivery rate (CADR) of 347 and is capable of clearing the air in a room of 1,300 sq. ft. once every 30 minutes.

It’s a high-end model that comes in several different covers for the front panel so you can help it blend more into your home’s décor. Besides that, it has a touch panel for straightforward handling of the unit. This purifier features five speed settings and a timer.

You can also set it on automatic mode. The fan speed will then adjust automatically based on the current air quality. There are five air quality colors: blue (excellent), green (good), orange (fair), red (poor), and purple (bad). It utilizes a Laser Smart Sensor setup so that you always feel at ease knowing the air purifier will adapt accordingly.

To keep the air in your home comfortable and safe to breathe, it features a medical-grade H13 True HEPA filter (you should check out our recently updated list of the best medical grade air purifiers as of 2021. This filter works to remove particles larger than 0.1 microns, taking away about 99.99% of them. Airborne pollutants it can handle include bacteria, allergens, and aerosolized viruses. There’s also a pre-filter that you can vacuum that works to handle larger particles while extending the life of the HEPA filter.

  • Purifier Technology: H13 True HEPA
  • Room Size Suitability: 1,300 sq. ft. 
  • Filter Life: 12 to 15 months
  • Noise Level: 25 dB to 49 dB
  • Monthly Energy Consumption: $1.31

What we love:

  • Typically operates quietly
  • Seems to have good portability despite its large size
  • Removes cooking odors fast
  • Ability to turn off the panel light

We don’t like this as much:

  • Doesn’t have a remote
  • Controls may respond a bit slow at times
Alen BreatheSmart 75i Large Room Air Purifier, Medical Grade Filtration H13 True HEPA for 1300 Sqft, 99.99% Airborne Particle Removal, Captures Allergens, Bacteria, Mold, in White, Allergies
  • RECOMMENDED FOR: Dust, dander, allergens, pet fur, and odors. Perfect for large rooms, offices, schools and open spaces
  • B7-PURE FILTER: Standard filter that helps eliminate asthma and allergy triggers
  • TRUE HEPA: Includes a Medical Grade H13 True HEPA layer that captures 99.99% bacteria, aerosolized viruses, and airborne particles larger than 0.1 micron. True HEPA filters last 3-5 months longer than standard filters.
  • 5 AIR QUALITY COLORS: A Laser Smart Sensor detects airborne particles and auto-adjusts with air quality changes. Blue = Excellent, Green = Good, Orange = Fair, Red = Poor, Purple = Bad air quality (high levels of particles)
  • QUIETLY POWERFUL: Cleans 1300 SqFt every 30 minutes and eliminates airborne pollutants fast. Perfectly tuned to generate soothing pink noise - a frequency to help you sleep up to better

2. Airmega 400S

Coway AP-2015E HEPA Air Purifier, 1560 sq. ft, White

With the Airmega 400S, you can have cleaner and fresher smelling air quickly in multiple rooms. When used according to recommendations from the company, it can filter the air twice per hour in an area of 1,560 sq. ft. It is helped by its dual suction design model that draws in the contaminated air from two sides rather than a single side. You can use the panel to control the unit or the compatible app.

It also features real-time air quality monitoring via a circular, bright LED light. The LED light turns blue to indicate good air quality, green to indicate moderate air, orange to indicate unhealthy air, and purple to indicate very unhealthy air. You can set the Smart Mode function so that the unit will adapt on its own to the changes in air quality, speeding up the fan or slowing it down. This will give you peace of mind and makes it energy efficient.

To clean the air, the unit features effective three-stage filtration technology. The pre-filter easily handles the likes of large dust particles and hair, while the True HEPA filter takes out about 99.97% of the likes of mold, fine dust, and more smaller particles.

Lastly, there is the activated carbon filter. This is also known as the deodorization filter as it can remove tough odors such as harmful gas and cigarette fumes. It may also take out pet odors, food smells, and VOCs.

  • Purifier Technology: Pre-filter | Max2 filter (True HEPA | Activated carbon)
  • Room Size Suitability: 1,560 sq. ft. 
  • Filter Life: 12 months
  • Noise Level: 22 dB to 52 dB
  • Monthly Energy Consumption: $1.92

What we love:

  • Smooth fan operation that pushes the air up for better circulation
  • Has a quality scheduling feature
  • Intuitive and easy-to-use controls
  • Measures the air quality well and adapts fast

We don’t like this as much:

  • Some connectivity and usage issues with the app
  • Smart Mode can automatically turn the unit off when you don’t want it to
Coway AP-2015E HEPA Air Purifier, 1560 sq. ft, White
  • Coway Airmega 400S is designed to accommodate large room sizes up to 1, 560 square feet and cleans the air at least two times per hour when used as recommended.
  • Coway Airmega Max2 filter – combined activated carbon and True HEPA filter – captures and reduces up to 99.97% of particles 0.3 microns in the air, including pollen, pollutants and other allergens. It also reduces more than 99% of volatile organic compounds and reduces fumes such as NH3 and CH3CHO. It also includes washable and permanent pre-filter to catch larger dust particles.
  • Coway Airmega’s pollution sensor communicates indoor air quality testing in real-time. The brightly colored LED ring lets you know how clean or dirty your indoor air is every minute of the day.
  • Coway Airmega has five fan modes: Smart, Sleep, Low, Medium and High. The noise level is nearly silent at lower speeds and the max noise it creates at the highest setting is 43. 2 dB.
  • Smart mode with three settings, Coway Airmega smart air purifier adapts to its surroundings. Fan speed automatically adjusts based on the room's air quality and lighting conditions to improve air quality.

3. IQAir HealthPro Plus 250

IQAir HealthPro Plus – Medical-Grade Air Purifier with H13 HyperHEPA Filter for Particles, Gases, & Odors – Bacteria, Viruses, Airborne Contaminants, Allergens, Pets, Asthma Triggers, Smoke, Pollen, Dust; Swiss Made, White

The IQAir HealthPro Plus 250 features professional-grade filtration. Its HyperHEPA technology works on trapping ultrafine particles that are as small as 0.003 microns. This generally captures up to 99.5% of these particles that include viruses and bacteria. The filters are well-designed too and 100% sealed into the frame to prevent any air from leaking out.

This is ideal for larger and open spaces thanks to its patented EvenFlow Diffuser. This system provides 320° air delivery. It sends clean air out evenly so that no area in the room is left untreated. Also, it features a powerful fan with six different speeds so you can adapt it as you see fit.

The control panel has a classic, straightforward design. It also comes with a remote where you can set the fan speed, timer, and quickly turn the unit on and off. On the unit is also filter-life monitoring. This is done via color-coded lights that let you know when it’s time for replacements.

  • Purifier Technology: Pre-filter | V5 cell | HyperHEPA
  • Room Size Suitability: 1,125 sq. ft. 
  • Filter Life: Pre-filter (12 to 18 months) | V5 cell (15 to 21 months) | HyperHEPA (36 to 48 months)
  • Noise Level: 22 dB to 57 dB
  • Monthly Energy Consumption: $3.94

What we love:

  • Comes with quality casters for easy transportation
  • Setting it up and getting it started is simple and quick
  • User-friendly remote
  • Does well at cutting down surface dust

We don’t like this as much:

  • High fan speeds can produce a good deal of noise
  • Filter replacements are expensive
IQAir HealthPro Plus – Medical-Grade Air Purifier with H13 HyperHEPA Filter for Particles, Gases, & Odors – Bacteria, Viruses, Airborne Contaminants, Allergens, Pets, Asthma Triggers, Smoke, Pollen, Dust; Swiss Made, White
  • #1 Rated Room Air Purifier with exclusive HyperHEPA, V5-Cell, and PreMax filtration for particles, gases, & odors
  • Professional-Grade Air Filtration: Filters particles 100x smaller than 0.3 microns, much smaller than a virus
  • IQAir advanced HyperHEPA filters trap ultrafine particles down to 0.003 microns
  • Powerful filtration: Covers a room size up to 1,125 sq ft (104.5 sq m), with air delivery up to 300 cfm (510 m3h) at highest fan speed
  • Direct purchases from the manufacturer will require a signature to acknowledge receipt upon delivery. CARB EO # G-10-059. EPA Establishment # 97566-CHE-1

4. Blueair Classic 605

Blueair Classic 605 Air Purifier with HEPASilent Filtration for Allergen and Hay Fever Reduction, Large Rooms 775 sq. ft. WiFi Enabled, ALEXA compatible

Effective for mid-range or average-sized homes, the Blueair Classic 605 features a CADR of 500 CFM by giving five air changes per hour when used at higher fan speeds. From open floor plans to placing it in a hallway and leaving the doors around open, the unit can manage multiple rooms with ease.

This features three fan speeds to work through depending on the air cleaning needs. No matter what speed is utilized, the unit successfully uses HEPASilent technology to ward off allergies and help everyone in the home breathe better. This traps and electrifies pollutants and small particles from mold to viruses.

Controlling it all is simple thanks to the clear-cut control panel with easy-to-press buttons. Besides working the unit, the panel also has a filter change indicator light so you never have to worry about leaving the filter in longer than what it’s effective.

Besides the panel, you can also control the unit by downloading the Blueair Friend app. You won’t just get to control it from the app either as you also can monitor the air quality, set up a timer schedule, or place it in auto mode.

  • Purifier Technology: HEPASilent
  • Room Size Suitability: 698 sq. ft. 
  • Filter Life: Six months
  • Noise Level: 32 dB to 62 dB
  • Monthly Energy Consumption: $2.92

What we love:

  • It’s easy to change the filters
  • Works to purify the air in spacious rooms fast
  • Features high-quality, durable construction
  • Compatible with Wi-Fi and Alexa

We don’t like this as much:

  • It is quite heavy
  • The motor tends to run loudly
Blueair Classic 605 Air Purifier with HEPASilent Filtration for Allergen and Hay Fever Reduction, Large Rooms 775 sq. ft. WiFi Enabled, ALEXA compatible
  • Performance you can trust; Independently evaluated and third-party tested for performance as part of the AHAM Verified Program for room air cleaners
  • Extra-large rooms; Filters the air at a rate of approx. 4.8x an hour (every 12.5 minutes at 698 ft²) to effectively lower and maintain particle levels
  • HEPASilent technology; Removes 99.97% of airborne particles down to 0.1 microns, such as pollen, dust, mold, pet dander, bacteria, and viruses⁰
  • Wi-Fi enabled; Change settings remotely from your smartphone via the Blueair app or connect with your Amazon Alexa enabled device for voice control
  • Odor removal with DualProtection filters; high-porosity coconut carbon removes gases, chemicals, VOC, and odors from pets, cooking, and smoking

5. Hathaspace HSP002

HATHASPACE Smart True HEPA Air Purifier 2.0 for Extra-Large Rooms with Medical Grade H13 HEPA Filter, 5-in-1 Home Air Cleaner for Allergies, Asthma, Pets, Odors, Smokers, 1500+ Sq Ft Coverage - HSP002

The Hatahaspace HSP002 is a robust unit great for larger homes as it can clear the air every hour in a room roughly 1,500 sq. ft.  With its quality medical-grade HEPA filter, it can cut down on 99.97% of particles as small as 0.1 micron. It can also cut down on airborne bacteria and viruses as well as work to eliminate smoke and odors.

This five-stage filtration process can also work with cutting back on VOCs in the air, making it a well-rounded unit that will tackle various issues. It’s safe for use in a house filled with pets as well as children.

Maintaining the unit is clear-cut thanks to its washable pre-filter. Understanding and controlling the unit is also simple thanks to its well-designed touch-screen display panel. From here, you can easily control the speed, set it on sleep mode or auto mode, and even control the lighting on the unit.

This display also reveals what your EPA Air Quality Index score is. There is a sleek light on the front of the panel that will change colors based on the current air quality.

  • Purifier Technology: Pre-filter | Polypropylene pre-filter | HEPA 13 | Xellular-activated carbon with zeolite | Cold catalyst filter
  • Room Size Suitability: 1,500 sq. ft. 
  • Filter Life: 4 months | 3,000 hours
  • Noise Level: 30 dB to 60 dB
  • Monthly Energy Consumption: $2.92

What we love:

  • Fan has a comfortable noise level
  • Quality initial diagnostic period when first turned on
  • Touch panel is user-friendly and easy to understand
  • Removes odors in the air quickly

We don’t like this as much:

  • Filters tend to be expensive to replace
  • There’s a chance dust can settle on top of the control panel
HATHASPACE Smart True HEPA Air Purifier 2.0 for Extra-Large Rooms with Medical Grade H13 HEPA Filter, 5-in-1 Home Air Cleaner for Allergies, Asthma, Pets, Odors, Smokers, 1500+ Sq Ft Coverage - HSP002
  • MEDICAL GRADE HEPA – Better than H11 HEPA, H13 HEPA filters 99.97% of particles down to 0.3 microns and 99.95% of particles between 0.3 – 0.1 microns. Our 5-in-1 filter system targets pollen, dust, pet dander, VOC’s, tobacco smoke, odors, and more. H13 HEPA is considered medical grade air filtration. The unit alone is not a medical device.
  • 1500+ SQ FT COVERAGE – Perfect for extra-large rooms, our air purifier replaces 100% of the air in a 1500 sq ft space every hour. With a state-of-the-art fan and motor, enjoy clean air delivered quietly and efficiently in your home, bedroom, office, kitchen, basement, or living room.
  • KNOW YOUR AIR QUALITY – A smart particle sensor monitors your air quality, giving you precise measurements and feedback in real-time. A sleek touchscreen display panel reveals your official EPA Air Quality Index score, while a light on the front panel changes color depending on your air quality.
  • BREATHE EASIER – Spend more time doing what you love without allergies or asthma. In AUTO mode, relax and let your air purifier run the show while it automatically adjusts the fan speed based on your surrounding air.
  • WHAT YOU GET – Large smart air purifier, medical grade HEPA composite filter, washable pre-filter, manual, 5-year warranty, award-winning customer support 7 days a week, and the peace of mind that comes from a trusted American brand.

6. Medify Air MA-112 V2.0

Medify MA-112 Air Purifier with H13 True HEPA Filter | 2,500 sq ft Coverage | for Smoke, Smokers, Dust, Odors, Pet Dander | Quiet 99.9% Removal to 0.1 Microns | White, 1-Pack

The Medify Air MA-112 V2.0 is a tall unit that features a modern design so it won’t stand out too much, allowing you the freedom to set it up in numerous areas throughout your home and is available in black or white.

It features high-grade H13 True HEPA filters that can remove up to 99.9% of airborne particles. These particles include virus carriers, lead dust, pet dander, mold, asbestos, and more. By clearing out these harmful toxins and allergens, it can make the air in a large-sized room or multiple rooms throughout your home fresher and healthier.

There’s a pre-filter that everything crosses first to handle larger particles such as hair and normal household dust. This purifier also has an activated carbon filter that works well in killing and absorbing odors.

You can adjust the unit through four different fan speeds so that it runs as strong or as gentle as you’d like. There is also a timer function you can set up so that it runs for a set amount of time before cutting off. When running on high, it may clear the air in a room around 2,000 sq. ft.  once every 30 minutes.

  • Purifier Technology: Pre-filter | H13 True HEPA | Activated carbon filter | Optional anion generator
  • Room Size Suitability: 2,400 sq. ft. 
  • Filter Life: Four months | 3,000 hours
  • Noise Level: 70 dB (max)
  • Monthly Energy Consumption: $2.77

What we love:

  • Air quality sensor has good sensitivity
  • Fast setup process
  • Low-noise design so that it can run throughout the day/night
  • Does well at eliminating dust in the air and on surfaces

We don’t like this as much:

  • It’s not possible to dim the light
  • Could benefit it if it had an auto fan adjusting mode
Medify MA-112 Air Purifier with H13 True HEPA Filter | 2,500 sq ft Coverage | for Smoke, Smokers, Dust, Odors, Pet Dander | Quiet 99.9% Removal to 0.1 Microns | White, 1-Pack
  • MAXIMUM COVERAGE: Cleans large spaces up to 3,700 sq ft in one hour, 2,500 sq ft in 30 minutes (CADR 950). Ideal for homes, apartments, bedrooms, living rooms, offices, schools, universities, classrooms, hospitals, restaurants, and other businesses.
  • DUAL HEPA H13 FILTRATION: Trusted to remove 99.9% of particles including odors, smoke, pet dander, dust, and more down to 0.1 microns in size. Captures finer particles than HEPA H11 (0.3 microns).
  • ULTRA QUIET: Choose from 4 fan speeds, with the lowest setting operating virtually silent. Runs at 110 Volts at a maximum noise level of 70 dB. For the most discreet operation, enable sleep mode to completely dim the unit's panel lights.
  • EASY TO USE FEATURES: Includes a sleek touch panel with 0-8 hour timer, fan speed, optional ionizer, dust sensor, sleep mode, filter replacement indicator, PM2.5 indicator, and child lock, great for both kids and pets.
  • QUALITY TESTED & BACKED: CARB, ETL, and Energy Star certified. Backed by a USA registered Lifetime Warranty when genuine Medify replacement filters are used. The replacement filter (B07MTQKJ14) lasts 3,000 hours or about 6 months.

7. Austin Air HealthMate Plus

Austin Air HealthMate Air Purifier B400B1, Standard, Black 1500 sq feet 3 speed

The Autsin Air HealthMate Plus is a high-end, yet simple, air purifier. It features a three-speed control switch, giving you enough options to increase or decrease the fan speed according to your home’s needs. This can manage a large room with ease as it covers up to 1,500 sq. ft.  On high settings, it has a CADR rating of 400 CFM.

It has good coverage thanks to the 360° progressive intake system. This can help you purify the space at a more moderate to fast pace, allowing you to clear the air of multiple rooms in little time. The fan and motor are also designed well and produce little noise while in use.

This features a True HEPA medical-grade filter that’s well-designed and built to last for up to five years before needing to be replaced. It can trap particles up to 99.97%, and these can be as small as 0.3 microns. Alongside that is an activated carbon filter that works on trapping odors and gases.

  • Purifier Technology: 2x pre-filter | Activated carbon filter | Medical-grade True HEPA filter
  • Room Size Suitability: 1,500 sq. ft. 
  • Filter Life: Five years
  • Noise Level: 55 dB to 60 dB
  • Monthly Energy Consumption: $3.85

What we love:

  • Straightforward control switch for quick adjusting
  • Made with built-in transportation wheels
  • Can create a noticeable difference in air quality in terms of allergy relief
  • Features a solid, heavy construction that feels long-lasting

We don’t like this as much:

  • Lacks additional technology such as air quality sensors or a timer
  • Bulky design that can make it awkward to move

8. LEVOIT LV-H134 Air Purifier

No products found.

The LEVOIT LV-H134 is a well-made air purifier that is great for smaller homes. Even so, it manages to purify a room around 710 sq. ft.  once every 18 minutes. There is also powerful 360° suction so that it can pull in contaminated air from all sides of the unit. Meanwhile, filtered air is pushed out through the top.

This unit has multiple filters that work together to clear the air. The pre-filter does well in trapping larger particles, while the True HEPA filter manages 99.97% of airborne particles. Finally, there is the activated carbon filter to trap odors and smoke.

It also features a Smart Auto Mode. This mode detects the particles in the air and indicates air quality via a circular LED light on the control panel. Blue indicates very good air quality, green good, orange moderate, and red bad.

  • Purifier Technology: Pre-filter | True HEPA | Activated carbon filter
  • Room Size Suitability: up to 1,170 sq. ft.  (effective range around 710 sq. ft.)
  • Filter Life: Six months
  • Noise Level: 25 dB to 54 dB
  • Monthly Energy Consumption: $1.31

What we love:

  • Filters last a good deal of time before needing to be replaced
  • Doesn’t weigh too much so it can be picked up and moved
  • Detects air quality changes well
  • Made in a sleek, space-saving design

We don’t like this as much:

  • Wheels could be improved to move over different surfaces better
  • There is no app or remote control

No products found.

FAQs About Whole-House Air Purifiers

How much area does an air purifier cover?

The area that an air purifier can cover depends on the specific purifier and how it’s made. Typically, a powerful air purifier can cover upwards of 1,000 sq. ft.  Every unit specifies its maximum room coverage so that there is no guesswork.

Where should I place my air purifier for maximum efficiency?

Proper setup is important to ensure you’re getting the most out of your air purifier. Focus on the areas you spend the most time in. This doesn’t just include yourself, but also anyone else you may live with, an area that guests frequent, and areas where pets go if you have them.

You can be strategic about this placement too. When you focus on the areas in between these high-traffic locations and leave doors open, one air purifier can cover multiple rooms at a time. This way, you won’t have to move it around as often to cover the whole house.

How long will it take for an air purifier to clean my home?

How long an air purifier will take to clean your home will depend on how powerful it is and the current quality of the air inside your home. Check out the Clean Air Delivery Rate (CADR) listed on the purifier.

You can check out the air changes per hour (ACH), which details how often an air purifier will change the air within a set space. The higher this number, the more often the air will be filtered each hour, which will result in better air quality.

Which Air Purifier Is Best for You?

An air purifier that can handle multiple rooms at a time is a great tool for freshening up the air throughout your entire home. This type of air purifier allows you to strategically place the unit in the right spots so that multiple locations get the same clean air coverage. So, no matter where you, your family, guests, and pets are in the house, everyone will be breathing in odor-free air that’s free of pollutants and other harmful airborne particles.

Last update on 2021-10-05 / Affiliate links / Images from Amazon Product Advertising API