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8 best air purifiers for 1000 square foot spaces, tested by HouseFresh

Updated on March 20, 2024
Written by
Teddy Booth
Teddy joined HouseFresh in 2019 as a senior content producer, producing written content as well as product photography and YouTube videos. He supports Danny as a product tester and is our lead how-to writer.

Our verdict

  • The best air purifier for spaces of up to 1,000 sq. ft. is the Levoit EverestAir – powerful and stylish.
  • If you’re on the budget, your best bet is the Levoit Core 600S as it offers the best performance for large spaces at the lowest possible price.
  • For those looking for a unit for rooms larger than 1,000 sq. ft. (and with $900 to spare), the most potent air purifier you could get is the IQAir HealthPro Plus.

With many of us spending more time indoors at home or work, ensuring that the air we breathe is clean and healthy is paramount. At home, you may notice signs of mold and mildew, or feel that last night’s cooking smells are still lingering. You may feel worried about the number of people breathing the same air at work. 

Either way, your indoor air could likely do with an upgrade and luckily, investing in an air purifier can help combat these problems and many more. But if you have a large area to purify, you should be looking for a unit equipped to clean the entire space.

There are many ‘Best Of’ lists that only consist of air purifiers that have sold the most units, but we have been using air purifiers in our daily lives for long enough to know that best-sellers are not always best-performers.

That is why we we buy each air purifier we review, so we can actually use it in our own home and give you our open and honest opinions. Every air purifier on this list has been thoroughly tested in our home lab environment.

Here’s what we do:

1️⃣ We fill our performance testing room with simulated pollutants using incense sticks.

2️⃣ We then use a Purple Air Indoor sensor to record how long it takes the air purifier to reduce the levels of PM1ug/m3, PM2.5ug/m3, and PM10ug/m3 particles in the air.

3️⃣ We use an electricity usage monitor to track the unit’s energy consumption.

4️⃣ We measure noise levels in decibels across all the unit’s power levels.

When looking for an air purifier for a large space of around 1,000 square feet, you must ensure the unit is not too small to do a good job in such a spacious area. Purchasing a unit that’s too small for the area will have two effects:

  1. It will take much longer for the air purifier to clear the room of contaminants.
  1. It will use more energy as you’ll need to use the air purifier at higher fan speeds.

That’s why when making this list, we looked for:

Air purifiers that use HEPA filters, as we know that HEPA technology is the best at clearing microscopic pollutants from the air in your home. HEPA filters capture particles as small as 0.3 microns with 99.97% efficiency.

Air purifiers that have a high CADR (Clean Air Delivery Rate) because only units with this will be capable of clearing 1000 Square Foot Spaces. If the CADR is low, big surfaces will strain the unit, and you won’t get good results either.   

In this guide, we’ve only chosen units capable of clearing pollutants from larger rooms efficiently and effectively before we delve into our detailed review of each unit.

The top 3 air purifiers for 1000 square foot spaces

Let’s look at my top three choices of Air Purifiers for 1000 Square Foot Spaces.

Levoit EverestAirLevoit Core 600SIQAir HealthPro Plus
AIR CLEANING SPEED ⚡13 minutes15 minutes25 minutes
CADR 👩‍🔬360 CFM410 CFM300 CFM
FILTER TECHNOLOGY 💨3-Stage Filtration3-Stage FiltrationHyperHEPA and V50-CELL gas and odor filter
MAX ROOM SIZE 📏558 sq. ft.1,588 sq. ft1125 sq. ft.
WEIGHT ⚖️20.7 lbs (9.38 kg)13.7 lbs (6.2 kg)35 lbs (16 kg)
OUR REVIEW 🔍EverestAir reviewCore 600S reviewIQAir HealthPro Plus review
PRICE 💵$499.99$249.99$899.00

Last update on 2024-04-20 / Affiliate links / Images from Amazon Product Advertising API

Now you’ve seen my favorites, check out the other air purifiers that we know will suit your large room. In this guide, we’ve put together a variety of air purifiers to help tackle indoor contaminants over a vast space. 

Covering all aspects, from special features to technology, we find the best units on the market at all price ranges, shapes and sizes.

1. Best overall: Levoit EverestAir

The EverestAir stands out as the top choice for purifying the air in large spaces. This air purifier takes the best features from the Levoit family and amplifies them to a new level of efficacy. 

With an impressive CADR score of 360 CFM, the EverestAir is primed to thoroughly clean the air in a room of up to 2790 sq. ft. per hour, ensuring an impressive five air changes each hour within spaces spanning 558 sq. ft.

At its core lies a sophisticated filtration system consisting of a robust main filter to capture even the tiniest particles and an Activated Carbon filter to neutralize odors and eliminate VOCs and toxic gasses. 

Unlike Levoit’s Core line, the EverestAir introduces an added washable pre-filter, extending the lifespan of the HEPA and activated carbon filters, which can last up to 15 months.

The EverestAir also has smart features that seamlessly integrate with the VeSync app for remote control and monitoring, putting the power to manage your air quality at your fingertips. It also displays detailed air quality readings on the display available in its control panel:

What we really like

Highly efficient Auto Mode
Adjustable vent angles for an optimal airflow in large spaces
As quiet as 24dB at lower fan speed
Features a powerful, extra-large fan with Levoit’s VortexAir technology

What we think could be better

Only 2-year warranty
There are no generic less costly filters available


HouseFresh Rating:★★★★★
Time to clean our test room:13 minutes
Air purifier technology:3-Stage Filtration (Pre-filter for large particles, main filter for airborne particles, high-efficiency activated carbon filter for odors and gasses)
Recommended room size:558 sq. ft.
Clean air delivery rate (CADR):360 CFM (612 m3/h)
Dimensions (in inches / in cm):18.9L x 8.5W x 23.2H inches (48L x 21.6W x 58.9H cm)
Weight (in pounds / in kg):20.7 lbs (9.38 kg)
Noise level (low – high):24 – 56dB
Filter life:12-15 months
Warranty:2 years
Estimated energy consumption:$87.25 per year
Country of manufacture:China

2. Best budget option: Levoit Core 600S

The Core 600S remarkably purifies the air of rooms from up to 1,588 sq. ft, with a high CADR rating of 410. Functioning at a variety of fan speeds, the 600S will freshen the air five times per hour on the highest speed but is recommended predominantly for rooms up to 635 sq. ft.

This unit features a 3-stage filtration system consisting of a pre-filter, a main filter, and custom high-efficiency Activated Carbon filter. HEPA filters are proven to remove 99.97% of indoor pollutants, including dust and pollen particles. 

Using a carbon trap method, the Levoit 600S custom carbon filter helps dissipate odors and hazardous VOCs. Equipped with a 4-speed fan setting and an auto mode, the 600S also features a downloadable app to control your purifier from your mobile phone or tablet. 

Like phone alarms, you can now schedule what time you want your air purifier to turn on and how long it should be scheduled for, with outstanding results. The Levoit 600S has a substantial amount of power for a fraction of the price compared with other units on the market.

What we really like

Cleans rooms at super fast speed
Great value for such a high CADR
Pulls a low 6.2 watts of power in sleep mode
Easily transportable between rooms as it weighs just 13.7 lbs

What we think could be better

The pre-filter can’t be removed 
If it’s too close to the wall it doesn’t work as effectively as the sensor is on the back



HouseFresh Rating:★★★★★
Time to clean our test room:15 minutes
Air purifier technology:3-Stage Filtration (Pre-filter for large particles, main filter for airborne particles, high-efficiency activated carbon filter for odors and gasses)
Recommended room size:635 sq. ft. 
Clean air delivery rate (CADR):410 CFM (697 m³/h)
Dimensions (in inches / in cm):12.3 x 12.3 x 23.6 inches (31.3 x 31.3 x 60 cm)
Weight (in pounds / in kg):13.7 lbs (6.2 kg)
Noise level (measured from 3 ft. away):Speed 1: 40.9 dB
Speed 2: 45.9 dB
Speed 3: 61.4 dB
Filter life:6 months
Electricity consumption (kilowatt-hour):Standby mode: 1.53 kWh
Speed 1: 7.92 kWh
Speed 2: 11.35 kWh
Speed 3: 21.15 kWh
Speed 4: 49.27 kWh
Estimated running costs (electricity consumption + filter replacements):$107.29 per year
Manufacturer’s warranty:2 years
Country of manufacture:China

3. Best for larger spaces: IQAir HealthPro Plus

The IQAir HealthPro Plus is a high-end, highly-rated air purifier designed and manufactured in Switzerland. With a V5-Cell and PreMax Filtration for gasses, particles and odors, this medical-grade air purifier is super practical, filtering particles 100 times smaller than 0.3 microns, much smaller than a virus.

This 35-pound unit measures 28H x 18W x 16D inches and covers a room up to 1,125 sq. ft. (104.5 square meters). It has an air delivery of up to 300 CFM (cubic feet per minute) or 560 m3/h (cubic meters per hour) at its highest fan speed.

The HealthPro Plus HyperHEPA medical-grade filter technology means that bacteria, viruses, allergens, mold and other airborne impurities will be absorbed by the purifier and replaced with clean, fresh and cool air in the room. This air purifier is a fantastic choice for those who suffer from allergies due to airborne particles and require ample space to be purified.

It can get pretty loud but you won’t mind the noise if you are trying to clean the air in a very large space in a short amount of time. Have a listen for yourself:

What we really like

Features a medical-grade filter
Significant number of adsorbents for removing odors and gases
Programmable timer with a remote control
Long-lasting filters require less maintenance

What we think could be better

We’d like to see an in-built gas and particle sensor
It’s a large unit that can’t be easily camouflaged 


HouseFresh Rating:★★★★★
Time to clean our test room:PurpleAir Touch: 24 minutes
PurpleAir Zen: 28 minutes
Air purifier technology:HyperHEPA and V50-CELL gas and odor filter
Recommended room size:450 to 1,125 sq. ft. 
Clean air delivery rate (CADR):300 CFM (510 m³/h)
Dimensions (in inches / in cm):28H x 18W x 16D inches (71H x 38W x 41D cm)
Weight (in pounds / in kg):35 lbs (16 kg)
Noise level (measured from 3 ft. away):Speed 1: 36.9 dB
Speed 2: 40.9 dB
Speed 3: 47.2 dB
Speed 4: 53.9 dB
Speed 5: 61.2 dB
Speed 6: 69 dB
Filter life:4 years
Electricity consumption (kilowatt-hour):Standby mode: 1 kWh
Speed 1: 16.5 kWh
Speed 2: 32.7 kWh
Speed 3: 47.3 kWh
Speed 4: 69 kWh
Speed 5: 94.3 kWh
Speed 6: 145.2 kWh
Estimated running costs (electricity consumption + filter replacements):$437.34 per year
Manufacturer’s warranty:10 years
Country of manufacture:Switzerland / Germany

4. Best warranty: Alen BreatheSmart 75i

The Alen BreatheSmart 75i is quiet but powerful, cleaning rooms up to 1300 sq. ft. every half an hour. This air purifier is perfect for open spaces, family rooms, schools and offices.

The Alen 75i uses a B7-Fresh filter containing 3.6 pounds of activated carbon to adsorb toxic particles from dust, pollen, allergens, household odors, pet dander, smoke from wildfires or cigarettes, fumes from aerosol sprays and chemicals. 

The medical-grade H13 True HEPA filter in the Alen 75i packs a powerful punch that captures 99.99% of aerosolized viruses, bacteria and airborne particles over 0.1 microns. The True-HEPA filter is more cost-effective and lasts three to five months longer than the standard filter. 

The 75i is tuned to generate a calming pink noise that helps you sleep better and provides a relaxing atmosphere:

What we really like

Available in a wide variety of attractive designs
A number of different filter types are available to upgrade the unit
Energy Star certified
Lifetime warranty helps to provide extra peace of mind

What we think could be better

Not so easy to move around 
We wish there was a power indicator light to show when the machine is operating


HouseFresh Rating:★★★★☆
Time to clean our test room:24 minutes
Air purifier technology:True HEPA H13 filters with activated carbon pellets + Ionizer technology
Recommended room size:Up to 1,300 sq. ft. (2 ACH)
Clean air delivery rate (CADR):347 CFM (589 m³/h)
Dimensions (in inches / in cm):27H x 18.5W x 11.5D inches (68.58H x 46.99W x 29.21D cm)
Weight (in pounds / in kg):12.2 kg (27 lbs)
Noise level (low – high):24 – 49dB
Filter life:12 – 15 months
Manufacturer’s warranty:Lifetime (with product registration & active filter subscription)
Estimated energy consumption:$47.30 per year
Country of manufacture:China

5. Best smart option: Coway Airmega 300S

The Coway Airmega 300S is the most advanced air purifier by Coway. This air purifier quietly, intelligently and effectively cycles the air in a room, leaving you with fresher, healthier air. It has a True HEPA dual filtration system cleans 99.97% of 0.3-micron airborne particles in rooms up to 1,256 square feet (two air changes per hour).

My favorite feature about the Airmega 300S is that it works with the Airmega mobile app (Android and iOS) and is compatible with Amazon’s Alexa, allowing you to monitor your home’s air quality remotely. 

The Airmega 300S has a permanent and washable pre-filter that catches larger than 0.3-micron particles. Its air quality sensor measures the air quality of the room in real time, broadcasting air pollution levels through its bright-colored LED ring.

The Coway Airmega has five fan modes: smart, sleep, low, medium and high. The three-setting smart mode allows the cleaner to adjust to its environment and the fan speed auto-adjusts according to the air and lighting conditions. 

The noise level is almost silent at low speeds and the maximum noise at its highest setting is 52 decibels:

What we really like

Superb air filtration
Offers a premium design that complements the modern home
Easy-to-read air quality indicator
Smart app compatible features

What we think could be better

We wish the companion app was a little more user-friendly
A way of silencing the unit, preventing it from emitting a beeping noise when changing modes, would be a bonus 


HouseFresh Rating:★★★★☆
Time to clean our test room:26 minutes
Air purifier technology:Three-stage HyperCaptive™ Max2 filters (pre-filter + activated carbon + Green True HEPA™)
Recommended room size:628 to 1256 sq. ft.
Clean air delivery rate (CADR):306 CFM (589 m³/h)
Dimensions (in inches / in cm):13.6W x 21.2H x 13.6D inches (34.5W x 53.8H x 34.5D cm)
Weight (in pounds / in kg):21.4 lbs (9.7 kg)
Noise level (low – high):22 – 52dB
Filter life:12 months
Manufacturer’s warranty:5 years from the date of the original retail purchase
Estimated energy consumption:$55.71 per year
Country of manufacture:South Korea

6. Best unit made in the USA: Austin Air HealthMate

Fact: The Austin Air HealthMate proved to be highly effective in removing harmful air pollutants from the air in six clinical trials.

The Austin Air HealthMate also has a 5-stage filtration system and can remove odors, VOCs (volatile organic compounds), gasses and sub-micron particles in rooms as large as 1,500 sq. ft. (1 air change per hour).

To clean the air of a large room effectively, the Austin Air HealthMate has a 360-degree air intake system and a 3-speed centrifugal fan. This powerful air purifier boasts an impressive CADR rating of 400 CFM, featuring a True HEPA filter and 15lbs of activated carbon with zeolite, which is the largest amount we have seen in a consumer air purifier. This combination makes the HealthMate into the perfect unit for dealing with VOCs and gas-based pollutants.

That said, this doesn’t come without noise. At its lowest fan speed, the HealthMate has a comfortable 40dB, but when you crank the unit up to its highest speed, noise levels reached 62dB:

What we really like

Uses activated carbon cloth, which is more absorbent compared to granulated carbon
Upward directed airflow helps to effectively and quickly cycle the air in the room
Perfect for those who suffer from asthma attacks 
High airflow with a powerful Clean Air Delivery Rate (CADR) 

What we think could be better

The addition of smart features, such as a digital display, would be a bonus
We wish this unit was Energy Star rated


HouseFresh Rating:★★★★☆
Time to clean our test room:36 minutes
Air purifier technology:Carbon Filter, HEPA Filter, Pre-Filter, Large Particle Pre-Filter
Recommended room size:750 to 1500 sq. ft. 
Clean air delivery rate (CADR):150 CFM (estimated based on HouseFresh tests)
Dimensions (in inches / in cm):23H x 14.5W x 14.5D inches (58.4H x 36.8W x 36.8D cm)
Weight (in pounds / in kg):47 lbs (21.3 kg)
Noise level (measured from 3 ft. away):Speed 1: 42 dB
Speed 2: 53.2 dB
Speed 3: 61.5 dB
Filter life:5 years
Electricity consumption (kilowatt-hour):Standby mode: 0 kWh
Speed 1: 61.1 kWh
Speed 2: 85.05 kWh
Speed 3: 147.6 kWh
Estimated running costs (electricity consumption + filter replacements):$254.56 per year
Manufacturer’s warranty:5 years
Country of manufacture:US – Buffalo, New York

7. Best quiet option: Smart Air Blast Mini

The Blast Mini surprises most with its high-powered and influential cleaning capabilities. Perfect for larger spaces in your home, the unit is beautifully designed with outstanding reliability in all indoor environments, such as homes, schools, hospitals and office spaces. 

Featuring a top-quality fan and a practical, oversized HEPA filter, Smart Air focuses heavily on its product performance and it indeed does that. Covering an astonishing 915 sq. ft. with a CADR rating of 435 CFM (740 m³/h), answers why this unit is recommended for both household and commercial purposes. 

If necessary, the Blast Mini also makes space for an optional carbon filter, allowing the unit to filter out unwanted odors or hazardous VOCs to give you the best possible performance.

What we really like

The HEPA filter lasts up to 18 – 24 months
Brilliantly made fan that allows for superb performance 
Has space for an optional activated carbon filter 
Smart and slick design blends in great with its surroundings

What we think could be better

The high-powered performance means it’s a little louder on the lowest setting compared to other units
Higher electricity consumption compared to other units


HouseFresh Rating:★★★★☆
Time to clean our test room:17 minutes
Air purifier technology:H13 HEPA Filter
Recommended room size:915 sq. ft.
Clean air delivery rate (CADR):435 CFM (740 m³/h)
Dimensions (in inches / in cm):22.6L x 13W x 24.8H inches (57.5L × 33W × 63H cm)
Weight (in pounds / in kg):59 lbs (26.8 kg)
Noise level (measured from 3 ft. away):Speed 1: 44.9 dB
Speed 2: 51.2 dB
Speed 3: 55.8 dB
Filter life:33 months
Electricity consumption (kilowatt-hour):Standby mode: 0 kWh
Speed 1: 51.9 kWh
Speed 2: 87.4 kWh
Speed 3: 122.7 kWh
Estimated running costs (electricity consumption + filter replacements):$277.70 per year
Manufacturer’s warranty:1 year
Country of manufacture:China

8. Best ionizer function: Blueair Blue Pure 211+ 

The Blueair Blue Pure 211+ is a slick, compact and super silent unit.  Its three-stage filtration system features a unique pre-filter that captures larger particles and is made with a washable fabric that wraps and attaches around the bottom half of the purifier. Perfect for medium / larger rooms, the 211+ will help dissipate any unwelcome indoor pollutants, helping people with allergies and sinus issues.

Combining HEPA and Activated charcoal, this product is capable of removing 99.97% of indoor pollutants while also filtering out hazardous VOCs and unwanted odors that may contaminate our homes. 

Featuring its trademark HEPA Silent technology, the 211+ operates at just 31dB on the lowest level and up to 56dB on the highest fan speed. Clearing rooms from up to 540 sq. ft and a CADR rating of 350 CFM for pollen, dust and smoke, the Blueair Blue Pure holds three AHAM, CARB and Energy Star certifications. Verifying that it’s energy-efficient, ozone-safe and the CADR rating is accurate.

What we really like

Whisper quiet mode
Particle filter included
Multiple color options for the pre-filter fabric
Certifications from the AHAM, CARB, and Energy Star mean it’s ozone-safe

What we think could be better

No smart sensor or air quality sensor
The ON button has a bright light that may disturb light sleepers


HouseFresh Rating:★★★★☆
Time to clean our test room:18 minutes
Air purifier technology:HEPASilent™ Technology and Activated Charcoal Filter + Ionizer technology
Recommended room size:540 sq. ft.
Clean air delivery rate (CADR):350 CFM
Dimensions (in inches / in cm):20H x 13W x 13D inches (51H x 33W x 33D cm)
Weight (in pounds / in kg):12.5 lbs (5.67 kg)
Noise level (measured from 3 ft. away):Speed 1: 37.2 dB
Speed 2: 45.8 dB
Speed 3: 55.7 dB
Filter life:6 – 8 months
Electricity consumption (kilowatt-hour):Standby mode: 0.1 kWh
Speed 1: 16.9 kWh
Speed 2: 40.5 kWh
Speed 3: 54.5 kWh
Estimated running costs (electricity consumption + filter replacements):$117.50 per year
Manufacturer’s warranty:1 year
Country of manufacture:Designed and engineered in Sweden, assembled in China

What to look for when buying an air purifier for a 1000 square foot space

Just because you have a vast space, it doesn’t mean you’re not susceptible to harmful pollutants. If left unchecked, these airborne contaminants build up, making the air you breathe potentially hazardous to your health.

Introducing the right air purifier to your space will help remove these microscopic particles from the air but not all air purifiers can successfully tackle these issues in large spaces.

When buying an air purifier for a space as large as 1,000 sq. ft., make sure to consider the following:

1. Room coverage

Air purifiers are designed to clear rooms of certain sizes. You must measure your space first and use this data to find the right unit for your home.

Here’s a simple formula you can use to measure the square footage of your room correctly.

Volume = room area (length x width) x ceiling height 

Our list features only air purifiers that can filter the air in large spaces. The Levoit Core 600S, for example, remarkably purifies the air of rooms from up to 1,588 sq. ft. 

2. The CADR (clean air delivery rate)

This number shows how effective the air purifier is at removing airborne contaminants from your room.

Our guide only features units with high CADR ratings. For example, the Smart Air Blast Mini has a CADR rating of 435 CFM (Cubic Feet per Minute), which makes it ideal for clearing pollutants from rooms of 1000 sq. ft. 

3. Filtration technology

The most effective filtration used in air purifiers is HEPA technology. HEPA uses a maze of tightly woven fibers to trap 99.97% of harmful microscopic particles, removing them from the air in your home. Here at HouseFresh, we champion air purifiers with HEPA filters over all others, as we have seen proof of how effective this technology is.

Combine HEPA filtration with activated carbon and you will get an air purifier that can deal with pollutants AND smells/gasses. Best combo.

Common questions about air purifiers for a 1000 square foot space

One of the benefits of using an air purifier rated for a room measuring 1000 sq. ft. or more is that you can use it anywhere in your home. The purifier will also work if you want to purify a smaller room. If you buy a smaller purifier and want to clean a larger room, it won’t do the job, hence the need to buy a bigger one. 

Most of these cleaners are quiet and offer sleep modes to reduce the noise. Some models come with large filters that filter more airborne particles.

While improving the air quality inside a building is essential, achieving it does not need to be ridiculously expensive. Investing in a larger air purifier ensures excellent air purification for the stated room size. The unit does not need to work hard to achieve this will result in a lower energy bill.

The system design of the building must include proper humidification plans. To improve the well-being of the occupants, the building owners must also consider virus deactivation and disinfecting technologies. The larger the purifier, the more effective it will generally be in cleaning the air and the less energy consumed.

According to the EPA, Americans spend 90% of their time indoors, where pollutants like dust, allergens, dander and VOCs can cause adverse health effects.

It’s essential to take certain steps to remove these pollutants from the air to stop them from triggering any health problems like allergies. The EPA recommends a few methods to improve your indoor air quality.

✅ Ventilate your home
Minimize sources of contaminants
Introduce an air purifier with a HEPA filter

If left unchecked, indoor pollutants can cause:

❌ Coughing and sneezing
Blocked nose
Irritation to eyes and throat
Dizziness and fatigue
Heart disease and respiratory diseases

Wrapping Up

Today, an air purifier is becoming something of a necessity. With viruses becoming a larger part of daily life, ensuring pristine air quality has never been more critical, especially in larger spaces where more people gather.

When buying an air filter for a 1000 sq. ft. space, you can’t only consider price and design. 

The most important factors are; is it made to perform in a space of that size? And, will it clear the pollutants that affect the air in my home the most?

In this guide, we’ve given you various options, all with HEPA filters and all that perform in spaces of 1000 square feet.

Last update on 2024-04-20 / Affiliate links / Images from Amazon Product Advertising API

About the author

Teddy Booth

Teddy joined HouseFresh in 2019 as a senior content producer, producing written content as well as product photography and YouTube videos. He supports Danny as a product tester and is our lead how-to writer.