Why it matters
The Medify Air MA-40 Air Purifier is a HEPA room unit air purifier that its maker rates for 896 sq ft.
At the usual 4.8 air changes an hour and an 8-foot ceiling, a 896-square-foot rating implies about 573 cubic feet of clean air a minute. In a 12-by-15-foot bedroom that would turn the air over roughly 24 times an hour.
Filtration: HEPA. Quietest setting, per the maker: 40.5 dB. Power draw: 68 W.
Price-wise it sat in the middle third of the 74 hepa room unit models we cover when we checked; the button shows today's price.
It qualifies for our lists Best Air Purifiers for Baby Nurseries, Best Air Purifiers for Allergies, 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 896 square feet is below the middle of the range we cover: 63 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 Medify Air MA-14 Air Purifier: rated room size 896 sq ft here vs 213 sq ft; power draw 68 W here vs 16 W.
Who it's for, and who should skip it
Good fit if
- Rooms up to about 896 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 896 sq ft
- Low setting 40.5 dB
- 68 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 | $249.99 | Maker |
|---|---|---|
| Room coverage | 896 sq ft | Maker |
| Quietest setting | 40.5 dB | Maker |
| Wattage | 68 W | Maker |
| Filter type | HEPA | Maker |
| Noise (seller) | 46 dB | Retailer |
Alternatives worth comparing
More air purifiers we cover
- Airpura R414 Air Purifier
- SwitchBot W5302310 Air Purifier
- Alen BreatheSmart 75i $799
- Levoit Core Mini-P Air Purifier $43.99
- Honeywell HPA250B Air Purifier
All air purifiers, compared in one table · Every Medify Air product we cover
Final verdict
A well-matched choice for rooms up to about 896 sq ft. Confirm the model it fits before ordering.
Where to buy
Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure