Honeywell HPA100 vs Winix A231
Quick take: The Winix A231 costs $10 less; the Winix A231 moves more air (148 CADR, 48% more cleaning power); the Winix A231 is the quieter bedroom unit (35 dB on sleep mode); the Winix A231 has a particle sensor with auto mode, so it actually responds to cooking smoke and pollen spikes on its own; the Winix A231 includes an ionizer — some buyers avoid these (see its cons for the ozone note).
| Spec | Honeywell HPA100 | Winix A231 |
|---|---|---|
| Price | ~$100 | ~$90 |
| Rating | 4.7★ (610) | 4.8★ (25) |
| Type | Small Room | Medium Room |
| CADR (smoke) | 100 CFM | 148 CFM |
| Honest Coverage (AHAM) | ~155 sq ft | ~230 sq ft |
| Claimed Coverage | 750 sq ft | 1,110 sq ft |
| Noise (sleep) | 48 dB | 35 dB |
| Noise (max) | 58 dB | 58 dB |
| Filter Cost / Year | $55 | $50 |
| Filter | 2-stage: carbon pre-filter + True HEPA (HRF-R1) | 4-stage: pre-filter + True HEPA + activated carbon + PlasmaWave |
| Filter Life | 12 mo | 12 mo |
| Max Power | 50W · Energy Star | 46W · Energy Star |
| Auto Mode | Manual only | Sensor + auto |
| Ionizer | None | Yes |
| WiFi Control | None | None |
| Weight | 8 lbs | 7 lbs |
| Maintenance | Two separate consumables: the HRF-R1 True HEPA filter (~$27) lasts 12 months, but the thin carbon 'Filter A' pre-filter needs replacing every 3 months. Buy the cut-to-size HRF-AP1 sheet (~$14) and trim your own pre-filters to roughly halve that recurring cost versus pre-cut packs. Separate indicator lights track each filter. No sensor to clean since there's no auto mode, and third-party filter bundles are plentiful with no lockout - though owners complain the knockoffs run paper-thin. | The 360-degree filter cartridge drops in from the top and lasts a full 12 months - twice the interval of the Levoit Core series, which is the quiet win here. Vacuum the outer mesh monthly and wipe the air quality sensor occasionally so auto mode stays honest. Genuine filters run about $50/year but well-reviewed generics cost around $15 with no DRM lockout. One quirk to know: the unit does not remember its settings after a power outage, so it restarts on default speed with PlasmaWave re-enabled. |
| Warranty | 5 years | 2 years |
Pros & cons
Honeywell HPA100
- ✓AHAM-verified 100 CFM smoke CADR - no inflated spec-sheet games
- ✓5-year warranty beats every rival in this price class
- ✓Cleared smoke tests quickly for its size in independent testing
- ✓Separate indicator lights for HEPA and pre-filter timing
- ✓Cut-to-size HRF-AP1 sheets tame the pre-filter running cost
- ✓Simple four-speed touch controls with a 2/4/8-hour timer
- ✓Honeywell parts availability measured in decades, not product cycles
- ✗Lowest speed is ~48 dB - no bedroom-quiet setting at all
- ✗No auto mode, sensor, WiFi, or app - fully manual
- ✗Thin fibrous carbon pre-filter barely touches odors
- ✗~$55/year in filters on a $100 purifier
- ✗750 sq ft claim is 1 air change/hour marketing - honest coverage is 155 sq ft
- ✗Dated industrial styling and middling build quality
Winix A231
- ✓Outcleaned the Levoit Core 300 in HouseFresh's independent test
- ✓AHAM-verified 230 sq ft coverage at 4.8 air changes/hour
- ✓12-month filter life - half the swap frequency of Levoit rivals
- ✓Particle sensor and auto mode at a price where rivals charge extra
- ✓Cheap generic filters (~$15/yr) with no DRM lockout
- ✓PlasmaWave ionizer is fully switchable for the ozone-cautious
- ✓Energy Star certified with light 7 lb build
- ✗1,110 sq ft claim is 1 air change/hour marketing - honest coverage ~230 sq ft
- ✗35 dB minimum speed is audible; light sleepers may notice
- ✗No settings memory - power loss resets speed and re-enables PlasmaWave
- ✗No WiFi, app, or voice control at all
- ✗Top speed hits 58 dB, loud for a compact unit
- ✗Buttons are unlit and hard to find in a dark bedroom