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Our pick if it has to go on the wall

Rabbit Air MinusA2

US MinusA2

$599.95US price, checked Oct 13, 2026

Slim wall-mount purifier for rooms near 280 ft², with $95 yearly filters

Check price at Rabbit Air Full review →

Portable air purifier

Austin Air HealthMate

HealthMate standard model

$715US price, checked Oct 13, 2026

Heavy steel purifier with lots of carbon, five-year filters and no published CADR

Check price at Austin Air Full review →

Criterion	Rabbit Air MinusA2	Austin Air HealthMate
US price	$599.95Checked Oct 13, 2026 · Price details in the review	$715Checked Oct 13, 2026 · Price details in the review
Three-year ownership estimate	$884.95 Incomplete known subtotal. Not included: energy use.	$952 Incomplete known subtotal. Not included: energy use.
Choose if	You want a purifier on the wall, not the floor, in a bedroom or office up to about 280 ft².	You want a steel purifier with lots of carbon for odors and a filter change only every few years.
Main trade-off	$599.95 buys a smoke CADR of 180, and Rabbit Air doesn't say who tested that figure.	You pay $715 or more without a CADR, room size, noise or wattage figure to judge it by.
Key specifications	CADR (smoke, dust, pollen): 180, 193 and 200; Rabbit Air doesn't name the test standard Room size: Rabbit Air says 408 ft² at 4 air changes an hour or 815 ft² at 2 (8 ft ceiling, top speed). Those match its 218 CFM airflow. On the 180 smoke CADR, 4.8 air changes an hour fits about 280 ft². Noise: 25.6 to 51.3 dBA across five speeds; no per-speed breakdown Power draw: 6 to 61 W (120 V, 0.85 A max); no per-speed or standby figures Filters: Washable pre-filter, medium, BioGS HEPA, one customized filter and activated carbon, plus an ion generator you can switch off Filter life and price: $95 kit (medium, HEPA, customized and carbon) every 12 months at 24/7, or up to 2 years at 12 hours a day; $14.95 spare pre-filter Size and weight: 20 × 21.4 × 7 in; 19.4 lb; wall-mount kit included Controls: Auto mode with particle and odor sensors, pollen mode and a light sensor; remote on the SPA-780A, Wi-Fi app control and no remote on the $619.95 SPA-780N	CADR (smoke, dust, pollen): Not published by Austin Air Room size: Not published. Austin Air says only that it can clean large rooms Filter: One 4-stage filter: two pre-filters, 780+ cu in of carbon and zeolite (up to 15 lb), 60 sq ft of HEPA HEPA efficiency (maker's claim): 99.97% of particles down to 0.3 micron and 99% down to 0.1 micron Filter life and price: Up to 5 years in normal home use; $395 per replacement Fan: 3-speed centrifugal; motor rated for continuous use Power draw and noise: Not published. The manual gives only the outlet: 120 V AC, 60 Hz Wheels: The manual lists easy-roll wheels on standard-size models Size and weight: 14.5 × 14.5 × 23 in; 47 lb
Exact variant	US MinusA2	HealthMate standard model
Dimensions	20 × 21.4 × 7 in (height × width × depth). Another spec section on the same page gives the height as 20.25 in. It weighs 19.4 lb, and the power cord is 9.33 ft.	14.5 L × 14.5 W × 23 H in; 47 lb.
Installation	None needed to stand it on the floor. It plugs into a 120 V outlet. A wall-mount kit comes in the box, and the manual says to drive the hanger screws into studs. On a wall it needs 2 ft of space below the ceiling and 8 in on each side. On the floor it needs 2 ft clear at the air outlet and 8 in at the intakes on each side.	No installation. It plugs into a standard 120 V outlet. Austin Air says to set it on a flat, dry, stable surface at least four inches from any wall, with the vent facing away from the wall. It's meant to run 24/7.
Materials	Six stages: a washable pre-filter, a medium filter, a BioGS HEPA filter, one customized filter, an activated carbon filter and a negative ion generator. You pick the customized filter: Germ Defense, Toxin Absorber, Pet Allergy or Odor Remover. Rabbit Air says the HEPA media is treated to keep bacteria and mold from growing on the filter itself. The ion generator can be switched off.	Steel housing with a 360° perforated intake and a baked-on powder-coat finish. The filter has a large-particle pre-filter, a medium-particle pre-filter, over 780 cubic inches of activated carbon and zeolite (up to 15 lb), and 60 sq ft of HEPA media.
Warranty	Rabbit Air covers defects in materials and workmanship for 5 years from the original retail purchase. Its registration page says registering gets you the 5-year warranty and free round-trip shipping to its service center in the contiguous US. The manual asks you to register within 90 days of purchase. Filters, filter frames and cases, wall-mount brackets and cosmetic damage aren't covered. Rabbit Air may ask for proof of purchase.	Five years on the unit against defects in material and workmanship, under normal home use. Coverage depends on returning the warranty registration. The filter has its own five-year pro-rated warranty, and Austin Air doesn't explain how the pro-rating works.
Returns	90 days from purchase, with a prepaid return label, for orders bought on RabbitAir.com and shipped in the contiguous 48 states. It has to come back like new, in the original packaging with the remote and manual. Items that aren't like new may carry a restocking fee. Replacement filters can't be returned once unwrapped.	30-day money-back guarantee, no questions asked. Austin Air doesn't say who pays return shipping.
Unresolved questions	Whether AHAM has verified its CADR figures Whether CARB certified it; the readable part of CARB's list held only recent entries Which test standard and lab produced the CADR figures Power draw and noise at each of the five speeds, and standby power Average power on auto, so the yearly electricity cost What warranty cover applies if you don't register	CADR for smoke, dust and pollen, and the room size it suits Power draw at each speed, so running cost is unknown Noise at each speed How the pro-rated filter warranty is calculated Why Austin Air's two stores list different prices Whether it's in AHAM's Verifide directory or on CARB's certified list

These comparisons use published specifications, not head-to-head tests. Prices and terms are dated. Unknown costs are not zero. Check the exact variant before you buy.