HEPA room unit · AirDoctor

AirDoctor AD1500

HEPA room unit air purifier

Updated October 2026

Quick verdict

A practical choice for rooms up to about 320 sq ft.

Strength
Rated for 320 sq ft.
Trade-off
Filters are an ongoing cost.
Right buyer
Rooms up to about 320 sq ft.
Price
$399.00
Room coverage
320 sq ft
CADR (smoke)
170 CFM
Filter type
UltraHEPA
Product weight
9.5 lbs
$399Manufacturer store price. Prices change; check the current price before you buy.

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Why it matters

The AirDoctor AD1500 is a HEPA room unit air purifier that its maker rates for 320 sq ft, with a smoke CADR of 170 CFM.

At the usual 4.8 air changes an hour and an 8-foot ceiling, a 320-square-foot rating implies about 205 cubic feet of clean air a minute. In a 12-by-15-foot bedroom that would turn the air over roughly 9 times an hour.

Filtration: UltraHEPA.

Price-wise it sat in the dearest 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 Allergies, Best Air Purifiers for Wildfire Smoke, Best Air Purifiers for Apartments and Dorms, where it is ranked against every model that meets the same rule.

Its rated room size of 320 square feet is one of the smallest ratings we cover: 24 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 AD4000: rated room size 320 sq ft here vs 694 sq ft; smoke CADR 170 CFM here vs 370 CFM.

The listing gives a weight of 9.5 lbs.

Who it's for, and who should skip it

Good fit if

  • Rooms up to about 320 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 320 sq ft
  • Smoke CADR 170 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$399Maker
Product weight9.5 lbsMaker
Room coverage320 sq ftMaker
CADR (smoke)170 CFMMaker
Filter typeUltraHEPAMaker

Alternatives worth comparing

More air purifiers we cover

All air purifiers, compared in one table · Every AirDoctor product we cover

Final verdict

A practical choice for rooms up to about 320 sq ft. Confirm the model it fits before ordering.

Where to buy

$399Manufacturer store price. Prices change; check the current price before you buy.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

How big a room does the AirDoctor AD1500 cover?
The maker rates it for 320 sq ft. Treat that as the room size for allergy-level cleaning; larger figures quoted per hour describe one air change, not continuous cleaning.