Air Purifiers · Head-to-head
Austin Air HealthMate HM400 (B400) vs Coway Airmega Mighty2 AP-1512N
Best Living-Area Unit for Multiple Smelly Pets
Austin Air HealthMate HM400 (B400)
4.3/10
$845.00 at Amazon
Check price at Amazon
The short answer
Coway Airmega Mighty2 AP-1512N comes out ahead overall with 8.0/10 against 4.3/10 for the Austin Air HealthMate HM400 (B400). Coway Airmega Mighty2 AP-1512N is stronger on noise at sleep-usable speeds, cleaning performance for bedroom size, sleep-friendly features, indoor-air safety & materials, running cost & ownership and value. At current verified prices, the Coway Airmega Mighty2 AP-1512N costs about $575.01 less.
- Choose the Austin Air HealthMate HM400 (B400) if: Homes with heavy, persistent pet odor that need a living-area unit. It is not a bedroom purifier: it is 42.5 dBA even at its lowest speed and has no sleep mode.
- Choose the Coway Airmega Mighty2 AP-1512N if: Pet owners who want the quietest strong dander cleaning in a bedroom up to about 390 sq ft, with no ionizer. For heavy litter-box or dog odor, choose the Core 400S-P with the Smoke Remover filter instead.
Scores by criterion
| Criterion | Austin Air HealthMate HM400 (B400) | Coway Airmega Mighty2 AP-1512N |
|---|---|---|
| Noise at sleep-usable speeds | 3.077 cfm PM1 under 45 dBA and a 42.5 dBA minimum (HouseFresh). | 8.6HouseFresh: 35.9 dBA in Sleep mode and 151 cfm at 42.6 dBA on speed 2. |
| Cleaning performance for bedroom size | 5.5Weak particle CADR, but unmatched odor capacity. | 7.5About 151 cfm at quiet speed 2 (99 cfm on speed 1); 260 cfm only at a loud 56.9 dBA. |
| Sleep-friendly features | 2.0No sleep mode, sensor or app. | 7.8Sleep mode and light sensor, but Smart mode forces sleep in the dark, the buttons are unlit and there is no app. |
| Indoor-air safety & materials | 8.0Steel housing, no ionizer, CSA approved. | 9.0No ionizer (HouseFresh); combined HEPA and carbon filter. |
| Running cost & ownership | 6.0A $315 filter every up to 5 years, but power draw is high. | 7.0$69.99 yearly filter, but HouseFresh rates it the most expensive mid-size unit to own in year one ($415.07). |
| Value | 4.0$845 pays off only for heavy odor. | 7.3$269.99 sold by Amazon; costs more but gives the most quiet airflow without an ionizer. |
Specifications
| Spec | Austin Air HealthMate HM400 (B400) | Coway Airmega Mighty2 AP-1512N |
|---|---|---|
| Exact model / SKU | HM400 / B400 | AP-1512N |
| Workflow type | Freestanding 360° steel-housed purifier: pre-filters + heavy carbon/zeolite + HEPA | Standard Room |
| Lowest-speed noise (manufacturer) | — | 19 dB |
| Independent PM1 CADR at maximum | 160 CFM | 237 CFM |
| Top-speed noise (manufacturer) | — | 50 dB |
| Independent PM1 CADR at low-noise setting | 77 CFM | 165 CFM |
| Lowest-speed noise (independent measurement) | 42.5 dBA | 35.9 dBA |
| Quiet-test threshold | HouseFresh: fastest speed under 45 dBA at 3 ft | ≤45 dBA |
| CADR (smoke where given, else headline) | — | 240 cfm |
| Measured noise range | 42.5–61.5 (HouseFresh) | 19–50 decibels |
| Recommended room size (4.8–5 ACH / AHAM) | 169 sq ft | 390 sq ft |
| AHAM-certified smoke CADR | — | 240 CFM |
| Max power draw | 147.6 W | 56 W |
| Ionization/electronic stage present | No | No |
| Sleep / night mode | No | Yes |
| App control | No | No |
| Model-specific ozone/technology disclosure | — | CARB classification: Mechanical (G-26-044) |
| Ionizer / electrostatic stage | — | None (removed vs original Mighty, per HouseFresh) |
| Particle-filter construction/certification | HEPA, 99.97% at 0.3 µm (Austin Air) | Washable pre-filter plus Max2 activated-carbon and IEST-certified HEPA filtration |
| Filter type | Single cartridge: pre-filters + activated carbon/zeolite + HEPA | Washable pre-filter + Max2 combined activated carbon/HEPA |
| Carbon-media format | Loose granular activated carbon + zeolite, ~15 lb | Activated-carbon pellets |
| Main filter life | 60 months | 12 months |
| OEM replacement-filter price | 315 USD | 69.99 USD |
| Quiet Mark certified | — | Yes |
| Stated filter interval | 60 months | 12 months |
| Manufacturer direct/list price | 845 USD | 269.99 USD |
| Dated US street price | — | 269.99 USD |
| Washable / removable pet pre-filter | — | Yes |
| Pet-hair pre-filter / intake design | — | Washable pre-filter |
| Activated carbon amount (where disclosed) | — | Not disclosed |
| Activated carbon amount (where disclosed) | ~15 lb carbon + zeolite (HouseFresh; Austin Air FAQ) | — |
Austin Air HealthMate HM400 (B400)
Pros
- About 15 lb of carbon and zeolite
- Filter rated for up to 5 years
- All-steel construction
- No ionizer
Cons
- Loud at its lowest speed
- Low particle CADR for the price
- High power draw
- Very expensive, with no sleep mode or app
A niche choice for persistent, heavy odor in a living area. For most homes, a cheaper machine with an upgraded carbon filter is the more practical route.
Full Austin Air HealthMate HM400 (B400) review →Coway Airmega Mighty2 AP-1512N
Pros
- Standard-room workflow
- Mechanical-filtration path
- Distinct exact-model corroborating sources
Cons
- Current ownership conditions require publication-time confirmation
- No cross-publisher quietness ranking is made
Recommended for standard-room use based on firsthand HouseFresh evidence and a distinct exact-model WIRED review.
Full Coway Airmega Mighty2 AP-1512N review →Both products are part of our guide The Best Air Purifiers for Pet Dander and Odor of 2026, where you can see every pick, how we score and current prices from each retailer.