Why it matters
The Winix AT40 Air Purifier is a large-room / whole-floor air purifier that its maker rates for 1968 square feet.
At the usual 4.8 air changes an hour and an 8-foot ceiling, a 1,968-square-foot rating implies about 1,260 cubic feet of clean air a minute. In a 12-by-15-foot bedroom that would turn the air over roughly 52 times an hour.
Filtration: HEPA. Quietest setting, per the listing: 23.5 db. Power draw: 42 watts.
Price-wise it sat in the cheapest third of the 57 large-room / whole-floor models we cover when we checked; the button shows today's price.
It qualifies for our lists Best Air Purifiers for Large Living Rooms, Best Air Purifiers for Home Offices, Best Winix purifiers and filters, where it is ranked against every model that meets the same rule.
Its rated room size of 1,968 square feet is above the middle of the range we cover: 114 of the 152 purifiers with a stated figure come in lower, and the range runs from 62 square feet to 4,800 square feet.
Compared with the Winix 5510 Air Purifier: rated room size 1968 square feet here vs 1881 square feet; power draw 42 watts here vs 65 watts.
The listing gives dimensions of 10.45 x 10.45 x 19 inches; 7 pounds and a weight of 7 pounds.
Warranty, per the listing: 2 Years Limited Warranty.
Who it's for, and who should skip it
Good fit if
- Rooms up to about 1968 square feet
- Large open rooms
Look elsewhere if
- Whole-home filtration on its own
- Removing gases without a substantial carbon stage
Pros and cons
Pros
- Rated for 1968 square feet
- Low setting 23.5 db
- 42 watts draw
Cons
- Filters are an ongoing cost
- Size to the room at 4.8 air changes per hour
Limitations to weigh
- Specifications are the maker's or seller's own figures; check fit against your equipment's model number and the actual size.
Specifications
The bracket shows where each figure comes from.
| Power source | air_powered | Retailer |
|---|---|---|
| Control | Touch | Retailer |
| Filter type | HEPA | Retailer |
| Room coverage | 1968 square feet | Retailer |
| Noise (seller) | 23.5 db | Retailer |
| Particle size captured | 0.01 micron | Retailer |
| Controls | Touch Control | Retailer |
| Wattage | 42 watts | Retailer |
| Targets | Dust, Odors, Pollen, cigarette_smoke, pet_dander | Retailer |
| Model number | 1022-0238-00 | Retailer |
| Unit count | 1 Count | Retailer |
| Warranty | 2 Years Limited Warranty | Retailer |
| In the box | All-in-one Pre-Filter, True HEPA Filter and Carbon Filter | Retailer |
| Product weight | 7 pounds | Retailer |
| Dimensions (seller) | 10.45 x 10.45 x 19 inches; 7 pounds | Retailer |
Alternatives worth comparing
More air purifiers we cover
- Airpura R600/R614 Air Purifier (R600-WHT) $849.98
- Levoit LV-H128 Desktop Air Purifier $49.99
- Medify Air MA-1400 PRO Air Purifier $3,399.99
- Levoit Core 300S-P Smart Air Purifier $149.99
- Coway Airmega MightyS AP-1512HHS $299.99
All air purifiers, compared in one table · Every Winix product we cover
Final verdict
A well-matched choice for rooms up to about 1968 square feet. Confirm the model it fits before ordering.
Where to buy
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