Rabbit Air A3 vs Coway Airmega 250S
Two of the large-room air purifiers in our best large-room air purifiers: coway, blueair, levoit, winix, iqair & more comparison, lined up spec by spec. Every figure comes from the manufacturer pages linked below, and the scores use the same published formula as the full ranking.
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Best for: A wall-mountable purifier with a custom filter slot
Check price at AmazonBest for: A slim, wall-friendly 249 CFM purifier
Check price at AmazonSpec-by-spec comparison
Green marks the better published figure. "Not listed" means the manufacturer doesn't publish it.
| Spec | Rabbit Air A3 | Coway Airmega 250S | Weight |
|---|---|---|---|
| Smoke CADRSmoke is the hardest of the three AHAM CADR tests, so we use it when listed. Levoit lists one headline CADR, and we use that. Shark, Honeywell, Molekule and IQAir don't publish an AHAM CADR, so those cells are blank and score at the lowest published value in the category. | 257 CFM | 249 CFM | 40% |
| CADR per wattComputed by us: smoke CADR divided by the maker's rated or maximum power. Higher means more clean air for the electricity, which matters for a machine that runs all day. | Not listed | 3.9 CFM/W | 15% |
| Quietest settingThe lowest listed noise level, usually sleep mode. Makers measure at different distances, so treat differences of 1–2 dB as a tie. | 20.3 dB | 22 dB | 10% |
| Loudest settingNoise at top speed, which is what you hear when you run it hard for smoke or cooking. Left blank when the maker lists only the minimum. | 51 dB | 54 dB | 10% |
| Carbon or odor stage includedYes when the filter in the box includes an activated-carbon or deodorization stage, per the maker. HEPA alone traps particles but not odors or gases. | Yes | Yes | 10% |
| Main filter lifeThe maker's 'up to' figure for the main HEPA filter. Makers assume different daily run times (noted on each product), so this is a rough guide to running costs. | 24 months | 12 months | 15% |
| CADR (pollen / dust / smoke) | 315 / 262 / 257 (standard edition) | Not listed | info |
| Coverage | Up to 1,070 ft² | 1,860 ft² at 1 air change/hr; 465 ft² at 4 | info |
| Filtration | 6 stages: pre-filter, medium, BioGS HEPA, activated carbon, customized filter, negative ions | Not listed | info |
| Custom filter options | Germ Defense, Pet Allergy, Toxin Absorber, Odor Remover | Not listed | info |
| Filter life | Up to 2 years at 12 h/day | Max2: 1 year | info |
| Noise | 20.3–51.0 dBA | 22–54 dB(A) | info |
| Power | 120 V, 0.84 A max (watts not listed) | 64 W | info |
| Warranty | 5 years | Not listed | info |
| CADR (smoke / dust / pollen) | Not listed | 249 / 261 / 230 | info |
| Filter | Not listed | Washable pre-filter + Max2 (activated carbon + HEPA) | info |
| Depth | Not listed | 8.3 in | info |
| Weight | Not listed | 20.5 lb | info |
| AirPick score | 4.8/10 | 3.4/10 | 100% |
Where each one comes out ahead
Rabbit Air A3
Better published figure on: Smoke CADR, Quietest setting, Loudest setting, Main filter life.
What we like
- Wall-mountable
- Filters rated up to 2 years (12 h/day)
- 5-year warranty
Watch out for
- Watts not listed
- Filter life assumes 12 h/day
Coway Airmega 250S
No scored spec where it is strictly ahead; its case rests on the strengths below.
What we like
- Only 8.3 in deep
- App and voice control
Watch out for
- 64 W for 249 CFM
Verdict
Both are slim enough to sit against a wall, and the A3 can be wall-mounted. Similar CADR (257 vs 249). Rabbit Air adds a choice of custom filter; Coway publishes its wattage.
- Rabbit Air A3: Rabbit Air: A3
- Coway Airmega 250S: Coway: Airmega 250S