Dreo Macro Max AS
#4 in Large roomsFull review
A strong-value smart purifier for large rooms up to about 450 sq ft.
Amazon $159.99$159.99
The Dreo Macro Max AS is the better air purifier overall, rated 3.8 to 3.4. The Dreo Macro Max AS leads on auto mode and value. The Dreo Macro Max AS costs $74.96 less ($159.99 vs $234.95).
Honeywell HPA300
#10 in Large roomsFull review
A proven, no-frills large-room HEPA purifier for anyone who wants high certified CADR without an app.
Amazon $234.95$234.95
Prices were last checked October 22, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Dreo Macro Max AS for auto mode (PM2.5 sensor and Wi-Fi app vs no air-quality sensor or app) and value ($0.54 per cfm of smoke CADR vs $0.78 per cfm of smoke CADR).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every large rooms air purifier; a clear win is highlighted. How we rank explains each one.
| Factor weight | Dreo Macro Max AS | Honeywell HPA300 |
|---|---|---|
| Overall rating | 3.8/5 | 3.4/5 |
| Value 25% | 92 $0.54 per cfm of smoke CADR | 71 $0.78 per cfm of smoke CADR |
| Filter cost 20% | 75 $79.98 a year in filters | 74 $84.99 a year in filters |
| Quiet 20% | 50 noise at top speed not published (neutral score used) | 50 noise at top speed not published (neutral score used) |
| Efficiency 15% | 52 6.2 cfm per watt | 50 efficiency not certified (neutral score used) |
| Auto mode 10% | 100 PM2.5 sensor and Wi-Fi app | 0 no air-quality sensor or app |
| Warranty 10% | 0 1-year warranty | 50 warranty not published (neutral score used) |
Independent measurements
Dreo Macro Max AS
No independent test published yet.
Honeywell HPA300
| Tested by | CADR | Noise | Conditions |
|---|---|---|---|
| HouseFresh | - | 59.5 dB | dB at 3 ft: 43.6 / 48.8 / 53.9 / 59.5 across four speeds; 28.35-76.2 W measured; cleared a 728 cu ft room in 20 min at top speed |
Specifications
| Dreo Macro Max AS | Honeywell HPA300 | |
|---|---|---|
| Performance | ||
| Smoke CADR | 294 cfm | 300 cfm |
| Dust CADR | 306 cfm | 320 cfm |
| Pollen CADR | 336 cfm | 300 cfm |
| PM2.5 CADR | 300 cfm | - |
| CADR certified by | AHAM Verifide | AHAM Verifide |
| Room size (AHAM) | 456 sq ft | 465 sq ft |
| Coverage (maker) | 2,187 sq ft | 2,250 sq ft |
| Noise | 19 dB | - |
| Efficiency | ||
| Efficiency (IEF) | 6.2 cfm/W | - |
| ENERGY STAR | No | No |
| Energy use | 282 kWh/year | - |
| Filters | ||
| Filter | 3-in-1 high-efficiency (HEPA-grade) filter with carbon layer and washable pre-filter | HEPA (3 R filters) with carbon pre-filter A |
| Activated carbon | Yes | Yes |
| Replacement | DR-HPA044 | HRF-ARVP300 (3 HEPA R + 4 pre-filter A) |
| Replacement cost | $39.99 every 6 months | $84.99 every 12 months |
| Yearly filter cost | $79.98/year | $84.99/year |
| Ionizer | No | No |
| CARB certified (ozone) | Yes | Yes |
| Controls and build | ||
| Air-quality sensor | PM2.5 | None |
| Auto mode | Yes | No |
| Wi-Fi app | Yes | No |
| Fan speeds | 4 | 4 |
| Dimensions | 20.91 x 11.04 x 11.04 in | 22.32 x 20.08 x 10.83 in |
| Weight | 12.6 lb | 17 lb |
| Warranty | 1 years | - |