Why it matters
The AirDoctor AD3500 is a large-room / whole-floor air purifier that its maker rates for 630 sq ft, with a smoke CADR of 340 CFM.
At the usual 4.8 air changes an hour and an 8-foot ceiling, a 630-square-foot rating implies about 403 cubic feet of clean air a minute. In a 12-by-15-foot bedroom that would turn the air over roughly 17 times an hour.
Filtration: UltraHEPA.
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 Kitchens, where it is ranked against every model that meets the same rule.
Its rated room size of 630 square feet is below the middle of the range we cover: 49 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 AirDoctor AD1500: rated room size 630 sq ft here vs 320 sq ft; smoke CADR 340 CFM here vs 170 CFM.
The listing gives a weight of 18 lbs.
Who it's for, and who should skip it
Good fit if
- Rooms up to about 630 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 630 sq ft
- Smoke CADR 340 CFM
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 | $659 | Maker |
|---|---|---|
| Product weight | 18 lbs | Maker |
| Room coverage | 630 sq ft | Maker |
| CADR (smoke) | 340 CFM | Maker |
| Filter type | UltraHEPA | Maker |
Alternatives worth comparing
More air purifiers we cover
- Dyson Purifier Cool Formaldehyde TP09 Air Purifier
- Honeywell HFD360 Air Purifier
- Levoit Eleva 300X Air Purifier $129.99
- Whirlpool WP500 Whispure HEPA Air Purifier (WP500B) $264.99
- IQAir HealthPro Plus XE Air Purifier
All air purifiers, compared in one table · Every AirDoctor product we cover
Final verdict
A sensible choice for rooms up to about 630 sq ft. Confirm the model it fits before ordering.
Where to buy
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