Air Purifiers
Best Whole House HEPA Air Purifier (2026): 4 Models Side by Side
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For the best whole house HEPA air purifier, the Levoit Core 600S-P leads this list with a CADR of 391 CFM and a maker rating of up to 2,933 sq ft. The Nuwave follows with a CADR of 664.6 CFM and a 5-stage filter system, while the SIESEAN adds a CADR of 235 CFM with an H13 True HEPA filter.
Starting out? See the main guide: Best Air Purifier
Top picks at a glance
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Best OverallLevoit Smart Air Purifiers for Home Large9.8 View on Amazon -
Runner-UpNuwave Whole House Air Purifiers9.7 View on Amazon -
Also GreatSIESEAN Hepa Air Purifiers for Home up9.3 View on Amazon -
Also GreatPuroAir 400 HEPA Air Purifiers for Home9.2 View on Amazon
Compare the specs
Ranked on cadr, coverage (maker's figure), hepa filter, phone app control, timer, speed settings, energy star from each listing, plus how many buyers have rated it. A dash (—) means we could not confirm that figure from the listing.
| Pick | CADR | Coverage (maker's figure) | HEPA filter | Phone app control | Timer | Speed settings | ENERGY STAR | Weight | Warranty |
|---|---|---|---|---|---|---|---|---|---|
| 1. Levoit Smart Air Purifiers for Home Large | 391 CFM | 2,933 sq ft | Yes | Yes | — | — | Yes | — | — |
| 2. Nuwave Whole House Air Purifiers | 664.6 CFM | — | Yes | — | Yes | 6 speeds | — | — | — |
| 3. SIESEAN Hepa Air Purifiers for Home up | 235 CFM | 3,500 sq ft | Yes | — | Yes | — | Yes | — | — |
| 4. PuroAir 400 HEPA Air Purifiers for Home | — | — | Yes | — | — | — | — | — | 2-year |
Levoit Smart Air Purifiers for Home Large
It pairs a CADR of 391 CFM with a 3-stage filter system, AHAM VERIFIDE certification, and app control with a remote.
- CADR: 391 CFM
- Coverage (maker's figure): 2,933 sq ft
- HEPA filter
- Phone app control
- ENERGY STAR
Good for
- Buyers who want app control with a remote
- Buyers who want a 3-stage filter with a sleep mode
Skip it if
- You need a CADR above 391 CFM
- You need coverage above 2,933 sq ft
It has a 3-stage filter system with a 3-in-1 original filter, and it has a sleep mode that runs HEPA-grade with the original filter. The CADR is 391 CFM, and the maker rates it for up to 2,933 sq ft. It offers app control, Alexa control, and a remote, with a noise level of 26 dB. It carries AHAM VERIFIDE and ENERGY STAR marks.
Nuwave Whole House Air Purifiers
It pairs a CADR of 664.6 CFM with a 5-stage filter system, air quality and odor sensors, and 6 speed settings.
- CADR: 664.6 CFM
- HEPA filter
- Timer
- Speed settings: 6 speeds
Good for
- Buyers who want 6 speed settings with a timer
- Buyers who want air quality and odor sensors
Skip it if
- You need a CADR above 664.6 CFM
- You need coverage above 2,934 sq ft
It has a 5-stage filter system with a washable stainless-steel pre-filter, a washable electrostatic Bio-Guard filter, a reusable ozone removal filter, and a replaceable True HEPA and activated carbon filter. The CADR is 664.6 CFM, and the maker rates it for up to 2,934 sq ft. It has 6 speed settings, a timer, and air quality and odor sensors that adjust fan speed. The True HEPA and activated carbon filter is replaceable about every 12 months.
SIESEAN Hepa Air Purifiers for Home up
It pairs a CADR of 235 CFM with an H13 True HEPA filter, a carbon filter, and a PM2.5 air quality display.
- CADR: 235 CFM
- Coverage (maker's figure): 3,500 sq ft
- HEPA filter
- Timer
- ENERGY STAR
Good for
- Buyers who want a PM2.5 display with auto mode
- Buyers who want a 3-year warranty with a timer
Skip it if
- You need a CADR above 235 CFM
- You need coverage above 3,500 sq ft
It has an H13 True HEPA filter with an activated carbon filter, and a CADR of 235 CFM. The maker rates it for up to 3,500 sq ft. It has a PM2.5 display, auto mode, a timer, and a sleep mode at 30 dB. The filter is replaceable every 3-4 months, and it carries a 3-year warranty.
PuroAir 400 HEPA Air Purifiers for Home
It pairs a 3-layer HEPA and carbon filter system with a PuroIQ sensor auto-mode and a 2-year warranty.
- HEPA filter
- 2-year warranty stated
Good for
- Buyers who want a sensor auto-mode with sleep mode
- Buyers who want a 2-year warranty
Skip it if
- You need coverage above 2,000 sq ft
- You want a warranty longer than 2 years
It has a 3-layer filter system with a pre-filter, a HEPA filter, and activated carbon. It filters up to 99.9% of pollutants, with particles at 0.1 micron. The maker rates it for up to 2,000 sq ft, and it has a PuroIQ sensor auto-mode with a sleep mode. It carries a 2-year warranty, with a noise level of 35 dB.
How to choose
CADR and coverage
CADR measures airflow in cubic feet per minute, while coverage is the floor area the maker rates. The Levoit lists a CADR of 391 CFM, the Nuwave lists 664.6 CFM, and the SIESEAN lists 235 CFM. For coverage, the maker rates the Levoit for up to 2,933 sq ft, the Nuwave for up to 2,934 sq ft, the SIESEAN for up to 3,500 sq ft, and the PuroAir for up to 2,000 sq ft. Compare CADR figures with each other and coverage figures with your floor area.
Filter stages and types
Filter stages count the layers air passes through. The Nuwave uses a 5-stage system, the SIESEAN uses an H13 True HEPA filter with carbon, and the PuroAir uses a 3-layer HEPA and carbon system. Carbon sits alongside HEPA on the Nuwave, the SIESEAN and the PuroAir. Check the stage count and the filter types before you choose.
Controls, sensors, and noise
Controls decide how you run the purifier. The Levoit offers app control, Alexa control, and a remote. The Nuwave, SIESEAN, and PuroAir use sensors and auto modes that adjust fan speed. Noise levels differ: the Levoit gives 26 dB, the Nuwave gives 31.4 dB, the SIESEAN gives 30 dB in sleep mode, and the PuroAir gives 35 dB. Compare the control type and the noise figure against where the unit will run.
FAQ
What CADR do these air purifiers list?
The Levoit lists 391 CFM, the Nuwave lists 664.6 CFM, and the SIESEAN lists 235 CFM. The PuroAir uses a 3-layer HEPA and carbon filter system.
Which purifiers have a sleep mode?
The Levoit, Nuwave, SIESEAN, and PuroAir all offer a sleep mode for nighttime use.
Which purifier lists a CADR of 664.6 CFM?
The Nuwave lists a CADR of 664.6 CFM, with a 5-stage filter system.
Which purifiers carry a stated warranty?
The SIESEAN carries a 3-year warranty and the PuroAir carries a 2-year warranty.
