Our pick for a medium room
Blueair Blue Pure 311i Max
Light, quiet purifier for rooms up to 439 ft², with $44.99 filters every 6 to 9 months
$229.99
Compare with this one →Our pick if it has to go on the wall
Rabbit AirMinusA2
Slim wall-mount purifier for rooms near 280 ft², with $95 yearly filters
Source-based analysis, not hands-on testing. Our method
Cofounder of Superhuman Chambers · About the author.
The verdict
The MinusA2 is a 7 in deep purifier that hangs on a wall or stands on the floor. Its smoke CADR of 180 suits a bedroom or office of about 280 ft², far less than Rabbit Air's room claim. The catch is cost: $599.95 up front, then a $95 filter kit each year if you run it nonstop.
The trade-off
$599.95 buys a smoke CADR of 180, and Rabbit Air doesn't say who tested that figure.
Model reviewed: US MinusA2
$599.95
Check price at Rabbit Air US price, checked
No affiliate commission on this link. Check the exact variant before buying.
About this price
List price on Rabbit Air's US store for the SPA-780A (no Wi-Fi) in Standard White with the Germ Defense filter. Standard Black and the other three filter choices cost the same. Art panels add $20, and the Wi-Fi SPA-780N is $619.95. The page showed it as the regular price, with no sale price or crossed-out price, and Rabbit Air's online store marked it in stock on Oct 13, 2026. Shipping and returns are free in the contiguous US. Before tax.
A GOOD FIT FOR
You want a purifier on the wall, not the floor, in a bedroom or office up to about 280 ft².
- A bedroom or home office up to about 280 ft²
- You'd rather hang it on a wall than give up floor space
- A narrow room where a 7 in deep panel fits better than a tower
- You want to pick a specialty filter: Germ Defense, Toxin Absorber, Pet Allergy or Odor Remover
- You want a 5-year warranty and 90 days to return it free
THINK TWICE IF
- A large open-plan room; the 815 ft² figure means 2 air changes an hour on fan airflow
- You want the most smoke CADR for your money; $599.95 buys a CADR of 180
- You want an Energy Star, AHAM or CARB listing you can check before buying
- You planned to hang it on a wall without studs
What still needs checking
- 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
The practical details.
| Exact variant | US MinusA2 |
|---|---|
| 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 |
| 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. |
| 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. |
Before you buy
InstallationNone needed to stand it on the floor
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.
WarrantyRabbit Air covers defects in materials and workmanship for 5 years…
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.
Returns90 days from purchase, with a prepaid return label…
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.
More about this assessment
The MinusA2 is a flat purifier, 7 in deep, that stands on a removable base or hangs on a wall with the included kit. Rabbit Air gives it a smoke CADR of 180, which suits a room of about 280 ft². Its 815 ft² room claim comes from fan airflow at 2 air changes an hour, not from CADR. It lists at $599.95, and a $95 filter kit lasts a year of round-the-clock use. The 5-year warranty depends on registering and leaves out filters and the wall bracket. It isn't on Energy Star's current list, and its AHAM and CARB status is unknown.
Strengths on paper
- Hangs on a wall with the included kit, or stands on a removable base
- Only 7 in deep, at 20 in tall and 21.4 in wide
- 25.6 dBA on its lowest speed
- All four customized filter options cost the same $95 per kit
- The ion generator switches off with a three-second button press
- 5 years of cover once registered, with free round-trip shipping to the service center in the contiguous US
- Free returns for 90 days in the contiguous US
- Listed on the Asthma & Allergy Friendly certifier's site, with a 2011 certification date
- Auto mode reacts to particles and odors, and a light sensor turns its lights off in a dark room
Limitations
- $599.95 for a smoke CADR of 180
- The 815 and 408 ft² room claims match its 218 CFM fan airflow, not the lower CADR
- A $95 filter kit every year if you run it around the clock
- Power and noise come only as ranges, with no per-speed figures
- Warranty cover is tied to registering, and filters and the wall bracket aren't covered
- Wall mounting needs studs and 2 ft of space below the ceiling
- The Wi-Fi SPA-780N costs $20 more and comes without a remote
- Auto-ship filters cost the full $95, with no subscription discount
- Opened replacement filters can't be returned
What it costs to own.
Adjust the assumptions for your use. Missing costs stay unknown.
PLAN YOUR OWNERSHIP COSTS
What will it cost to own?
Change the assumptions to fit your use. Leave an unknown cost blank. Add water, subscriptions, cleaning, shipping and taxes if they apply. Use average operating power, not the maximum rating.
3-year known subtotal
$884.95Incomplete: energy use. This is not the full ownership cost.
Energy component: Unknown
Purchase + installation + years × (annual consumables + annual other) + watts/1000 × hours/day × 365 × years × $/kWh. Annualized allowances, not an exact replacement schedule. Excludes taxes, shipping, finance and resale unless entered.Replacement parts & cost assumptions
Recorded recurring parts and refills:
- MinusA2 Filter Replacement Kit: $95 every 12 months. Holds the medium, BioGS HEPA, activated carbon and one customized filter. Rabbit Air says to replace it every 12 months running 24/7, or up to 2 years at 12 hours a day. All four versions (Germ Defense, Toxin Absorber, Pet Allergy, Odor Remover) cost $95. Auto-ship every 3 to 24 months costs the same as a one-time order.
- Pre-filter: $14.95. Washable, so it isn't a scheduled cost. Rabbit Air says to clean it every 3 months or as needed, with a vacuum or a wash. After washing, it needs 12 to 24 hours to dry. A replacement costs $14.95.
- Purchase is the $599.95 list price for the SPA-780A, with no sale shown.
- Filters are one $95 kit a year, based on Rabbit Air's 24/7 filter life. At 12 hours a day, Rabbit Air puts filters at $47.50 a year. Three years of purchase and filters at 24/7 comes to $884.95 before electricity.
- Hours per day is 24 because Rabbit Air's filter life assumes round-the-clock running.
- Energy is unknown because Rabbit Air gives a 6 to 61 W range, not an average. Running around the clock, the low end is about 53 kWh a year and the high end about 534 kWh. Rabbit Air's own cost math uses 26.72¢ per kWh, a California residential rate. At that rate, the range is about $14 to $143 a year.
- No required fees. Filter auto-ship is optional and costs the same as buying a kit once. Installation is $0 because it stands on its own base and the wall-mount kit is included.
Evidence & sources.
Do air purifiers work? Our evidence review grades the research as Strong. That grade is about the claim, not about this product.
- Manufacturer claimRabbit Air rates the MinusA2 at 180 for smoke, 193 for dust and 200 for pollen.1 Rabbit Air's own figures. No test standard or lab is named for them, and there's no AHAM Verifide mark. Its 815 and 408 ft² room figures match the 218 CFM top airflow at 2 and 4 air changes an hour, not the CADR.
- Manufacturer claimRabbit Air cites chamber tests by Airmid, Intertek and SGS for allergen, microbe and virus capture.1 Rabbit Air says the SGS tests used the AHAM AC-5-2023 standard. The test reports weren't reviewed, and Rabbit Air's own footnotes say real-world performance may vary. Capture in a test chamber isn't the same as how fast it cleans your room. Rabbit Air also says the Germ Defense filter doesn't protect people against germs. No published study of health effects with this model was reviewed.
- Manufacturer claimThe manual says the MinusA2 meets an ozone limit of 0.050 ppmv over 24 hours, and its negative ion generator can be switched off.5 The manual also cites Health Canada's guideline of 0.020 ppmv or less over 8 hours in a sealed room of about 30 m³. It names no lab or test report and doesn't mention CARB or UL 2998. Holding the Mood Light & Ion button for three seconds turns the ionizer off.
- CertificationThe Asthma & Allergy Friendly Certification Program lists the MinusA2 SPA-780A as certified.110 The certifier's page gives a certification date of March 25, 2011, and test protocol 08-05. It shows no expiry date. The Wi-Fi SPA-780N isn't named on it, and Rabbit Air's product page shows the same certification.
- CertificationA search of Energy Star's V3.0 certified room air cleaner data for Rabbit returned no results.8 Searches of the same dataset for other brands returned listings, so the search works. That means no current Energy Star CADR or yearly energy figure for the MinusA2. Older Energy Star versions weren't checked, and Rabbit Air's page doesn't claim Energy Star.
- Regulator recordThe readable part of CARB's list of certified air cleaning devices showed no Rabbit Air entry.9 The page text was cut off partway through, and the part read held entries notified from October 2025 to June 2026. Older entries weren't visible, so the MinusA2's CARB status is unconfirmed rather than missing.
Sources (10)
- MinusA2 Ultra Quiet Air Purifier Rabbit Air · manufacturer · checked Oct 13, 2026
- MinusA2 store listing (variants, prices, availability) Rabbit Air · manufacturer · data file · checked Oct 13, 2026
- MinusA2 Filter Replacement Kit store listing (options, prices, auto-ship) Rabbit Air · manufacturer · data file · checked Oct 13, 2026
- MinusA2 filter care and maintenance Rabbit Air · manufacturer · checked Oct 13, 2026
- MinusA2 SPA-780A user manual Rabbit Air · manufacturer · checked Oct 13, 2026
- Warranty Registration Rabbit Air · manufacturer · checked Oct 13, 2026
- Refund policy Rabbit Air · manufacturer · checked Oct 13, 2026
- ENERGY STAR Certified Room Air Cleaners V3.0 (search: Rabbit) U.S. EPA ENERGY STAR · certifier · data file · checked Oct 13, 2026
- List of CARB-Certified Air Cleaning Devices California Air Resources Board · regulator · checked Oct 13, 2026
- Rabbit Air MinusA2 SPA-780A Asthma & Allergy Friendly Air Purifier Asthma & Allergy Friendly Certification Program · certifier · checked Oct 13, 2026
Other options.
Back to our air quality picks →
Our pick for a small bedroom or office
Blueair Blue Pure 511
Low-cost purifier for one room up to about 190 ft², with filters at $48 a year
$99.99
Compare with this one →
Austin Air
Austin Air HealthMate
Heavy steel purifier with lots of carbon, five-year filters and no published CADR
$715
Compare with this one →About this review. The facts on this page come from manufacturer pages, certification listings and regulator records, checked Oct 13, 2026. The sources are listed above.
Our editorial policy →