Why it matters
The Airpura R400 All Purpose Compact Air Purifier (R400-Black) is a large-room / whole-floor air purifier that its maker rates for 1000 sq ft, with a smoke CADR of 360.0 CFM.
At the usual 4.8 air changes an hour and an 8-foot ceiling, a 1,000-square-foot rating implies about 640 cubic feet of clean air a minute. In a 12-by-15-foot bedroom that would turn the air over roughly 27 times an hour.
Filtration: True HEPA Filter. Quietest setting, per the maker: 52 dB (max). Power draw: 77 W.
Price-wise it sat in the middle 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 Allergies, Best Air Purifiers for Wildfire Smoke, Best Air Purifiers for Basements and Musty Odors, where it is ranked against every model that meets the same rule.
Its rated room size of 1,000 square feet is below the middle of the range we cover: 69 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 Airpura V400 VOC, Chemical, Smoke Compact Air Purifier (V400-Black): warranty 5-Year Warranty, 10-Year Parts here vs 5-Year Parts, 10-years Labor.
Warranty, per the maker: 5-Year Warranty, 10-Year Parts.
Who it's for, and who should skip it
Good fit if
- Rooms up to about 1000 sq ft
- Allergy season
Look elsewhere if
- Whole-home filtration on its own
- Removing gases without a substantial carbon stage
Pros and cons
Pros
- Rated for 1000 sq ft
- Smoke CADR 360.0 CFM
- Low setting 52 dB (max)
- 77 W 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.
| Price | $569.98 | Retailer |
|---|---|---|
| Model number | R400-Black | Retailer |
| Room coverage | 1000 sq ft | Retailer |
| CADR (smoke) | 360.0 CFM | Retailer |
| CADR (dust) | 360.0 | Retailer |
| CADR (pollen) | 360.0 | Retailer |
| Wattage | 77 W | Retailer |
| Noise (seller) | 52 dB (max) | Retailer |
| Airflow | 360.0 CFM | Retailer |
| Filter type | True HEPA Filter | Retailer |
| Voltage | 110-120 V | Retailer |
| Warranty | 5-Year Warranty, 10-Year Parts | Retailer |
Alternatives worth comparing
More air purifiers we cover
- Airpura P600/P614 Air Purifier (P600 - White) $1,399.98
- Shark NeverChange Compact Pro HP072 Air Purifier
- Dreo Smart Pet HAP009AS Air Purifier
- Winix 5530 Large Room Wi-Fi True HEPA Air Purifier (1022-0233-08) $229.99
- Coway Airmega 250S $449
All air purifiers, compared in one table · Every Airpura product we cover
Final verdict
A practical choice for rooms up to about 1000 sq ft. Confirm the model it fits before ordering.
Where to buy
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