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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

Winix 5500-2

US 5510, the closest current model to the discontinued 5500-2

$199.99US price, checked Oct 13, 2026

Discontinued, with the 5510 as the closest current model for rooms near 390 ft²

Check price at Winix Full review →

Criterion	Rabbit Air MinusA2	Winix 5500-2
US price	$599.95Checked Oct 13, 2026 · Price details in the review	$199.99Checked Oct 13, 2026 · Price details in the review
Three-year ownership estimate	$884.95 Incomplete known subtotal. Not included: energy use.	$349.96 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.	A bedroom or living room up to about 390 ft² where you want app control and one filter change a year.
Main trade-off	$599.95 buys a smoke CADR of 180, and Rabbit Air doesn't say who tested that figure.	It isn't in ENERGY STAR's certified list, and Winix's AHAM and CARB claims couldn't be checked in either registry.
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): 253, 252 and 247 Room size: 392 ft² at 4.8 air changes an hour (8 ft ceilings). Winix also says it cleans 941 ft² in 30 minutes and 1,882 ft² in an hour Noise: 23.5 dB on the slowest speed. No figure for higher speeds Power draw: 65 W rated. No figures for each speed or standby Filters: Washable fine mesh pre-filter, AOC carbon filter and True HEPA filter, plus PlasmaWave you can switch off Filter life and price: HEPA and carbon 12 months each. A Filter Q set is $49.99 on sale ($79.99 regular) Controls: 5 fan speeds (Low to Turbo, plus a slower Sleep speed), auto mode, light-sensing sleep mode, filter light, WiFi and Alexa. The timer is only in the Winix Smart App Size and weight: 13.59 × 8.27 × 22.17 in; 13.3 lb
Exact variant	US MinusA2	US 5510, the closest current model to the discontinued 5500-2
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.	13.59 × 8.27 × 22.17 in (width × depth × height). It weighs 13.3 lb. The 5500-2 was wider, taller and heavier, at 15 × 8.2 × 23.6 in and 15 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, 60 Hz outlet. Winix's manual says to leave 12 to 18 in from walls, and never less than 12 in while it runs. Leave the same gap from TVs, radios and other electronics. Use it indoors on a hard, flat surface, out of direct sunlight.
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.	Four stages: a washable fine mesh pre-filter, an AOC carbon filter made of carbon pellets, a True HEPA filter and PlasmaWave. Winix says the HEPA filter was tested to IEST-RP-CC0007. The manual says the carbon filter can't be washed. Housing materials aren't stated. It's made in Korea.
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.	Winix gives the 5510 and 5520 a 2-year limited warranty, valid only in the US and Canada. If a part is defective, Winix will repair or replace the part or the unit. You need proof of purchase from an authorized retailer. Independent sellers on Amazon, eBay and similar sites don't count. Non-Winix filters void it, and the filters themselves aren't covered. Claims start with a form in your winixamerica.com account, and you may pay for spare parts or shipping. The manual lists repair services as not available and says no spare parts will be made after the warranty ends. The discontinued 5500-2 is still on Winix's 2-year list.
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.	Orders from winixamerica.com can be returned within 30 days of purchase. Returns must be in the original packaging with all filters, manuals and parts. You pay the return shipping, and Winix asks you to mark the return authorization number on the box. If you bought from another retailer, its policy applies. Restocking fees aren't mentioned.
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	Power draw at each fan speed and on standby, and which speed the 65 W rating refers to Noise on Low, Medium, High and Turbo Whether AHAM's directory lists the 5510 at Winix's CADR figures. The directory couldn't be read Whether CARB certified the 5510 or 5520. The readable part of CARB's list showed only the 5530 Whether PlasmaWave is on when you first switch the 5510 on. The 5500-2 manual says it was Whether there's any timer without the app Shipping cost from Winix's store How long the $199.99 and $49.99 sale prices last How the 5510 does in independent testing

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.