Air Purifiers · Head-to-head
Austin Air HealthMate HM400 (B400) vs Levoit EverestAir-P
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
Levoit EverestAir-P comes out ahead overall with 7.8/10 against 4.3/10 for the Austin Air HealthMate HM400 (B400). Levoit EverestAir-P is stronger on noise at sleep-usable speeds, cleaning performance for bedroom size, sleep-friendly features, running cost & ownership and value. At current verified prices, the Levoit EverestAir-P costs about $345.01 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 Levoit EverestAir-P if: Open-plan homes or large living rooms with several pets, where budget is less of a concern.
Scores by criterion
| Criterion | Austin Air HealthMate HM400 (B400) | Levoit EverestAir-P |
|---|---|---|
| Noise at sleep-usable speeds | 3.077 cfm PM1 under 45 dBA and a 42.5 dBA minimum (HouseFresh). | 8.0205 cfm PM1 at 45 dBA or below, the best in the pool; 39.1 dBA lowest speed. |
| Cleaning performance for bedroom size | 5.5Weak particle CADR, but unmatched odor capacity. | 9.0375 cfm PM1 at top; 400 g pelleted carbon. |
| Sleep-friendly features | 2.0No sleep mode, sensor or app. | 8.3Sleep mode, auto mode, app, oscillating vents. |
| Indoor-air safety & materials | 8.0Steel housing, no ionizer, CSA approved. | 8.0No ionizer; no HEPA claim. |
| Running cost & ownership | 6.0A $315 filter every up to 5 years, but power draw is high. | 7.0$99.99 filter every 12–15 months; up to 70 W. |
| Value | 4.0$845 pays off only for heavy odor. | 5.8$499.99 is costly, but it is the only buyable large-carbon option. |
Specifications
| Spec | Austin Air HealthMate HM400 (B400) | Levoit EverestAir-P |
|---|---|---|
| Exact model / SKU | HM400 / B400 | LAP-EL551S-AUS |
| Workflow type | Freestanding 360° steel-housed purifier: pre-filters + heavy carbon/zeolite + HEPA | Large Room |
| Lowest-speed noise (manufacturer) | — | 24 dB |
| Independent PM1 CADR at maximum | 160 CFM | 351 CFM |
| Top-speed noise (manufacturer) | — | 56 dB |
| Independent PM1 CADR at low-noise setting | 77 CFM | 170 CFM |
| Lowest-speed noise (independent measurement) | 42.5 dBA | 39.1 dBA |
| Quiet-test threshold | HouseFresh: fastest speed under 45 dBA at 3 ft | ≤45 dBA |
| CADR (smoke where given, else headline) | — | 354 cfm |
| Measured noise range | 42.5–61.5 (HouseFresh) | 31.8–58.6 dBA |
| Recommended room size (4.8–5 ACH / AHAM) | 169 sq ft | 549 sq ft |
| AHAM-certified smoke CADR | — | 354 CFM |
| Max power draw | 147.6 W | 70 W |
| Ionization/electronic stage present | No | No |
| Sleep / night mode | No | Yes |
| App control | No | Yes |
| Model-specific ozone/technology disclosure | — | No ionizer (HouseFresh) |
| Ionizer / electrostatic stage | — | None |
| Particle-filter construction/certification | HEPA, 99.97% at 0.3 µm (Austin Air) | 3-stage system with a statically charged-fiber main filter |
| Filter type | Single cartridge: pre-filters + activated carbon/zeolite + HEPA | Washable pre-filter + particle filter + pelleted carbon |
| Carbon-media format | Loose granular activated carbon + zeolite, ~15 lb | Pellet-based activated carbon |
| Main filter life | 60 months | 15 months |
| OEM replacement-filter price | 315 USD | 99.99 USD |
| Stated filter interval | 60 months | — |
| Manufacturer direct/list price | 845 USD | 499.99 USD |
| Dated US street price | — | 379.99 USD |
| Washable / removable pet pre-filter | — | Yes |
| Pet-hair pre-filter / intake design | — | Washable pre-filter |
| Activated carbon amount (where disclosed) | — | ~400 g pelleted (HouseFresh) |
| Activated carbon amount (where disclosed) | ~15 lb carbon + zeolite (HouseFresh; Austin Air FAQ) | 400 g (HouseFresh) |
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 →Levoit EverestAir-P
Pros
- Large-room buyer fit
- Exact-model evidence from distinct publisher groups
- Source-bounded lower-noise delivery evidence
Cons
- Quiet-setting evidence is not cross-publisher comparable
- Current ownership conditions are not assessed here
Recommended for large-room buyers who place particular weight on the lower-noise delivery evidence reported by RTINGS.
Full Levoit EverestAir-P 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.