Dreo 338 Air Purifier
#1 in Small roomsFull review
A cheap, certified bedroom purifier with auto mode for rooms under about 180 sq ft.
Amazon $59.98$59.98
3.5/5
A frugal small purifier for a desk, nursery or small bedroom up to about 85 sq ft.
- 54 cfmSmoke CADR
- 84 sq ftRoom size
- 34 dBNoise
Check price at Amazon$49.99
Price checked October 22, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Very efficient: 10.3 CADR per watt, about 32 kWh a year
- Costs $50 and is ENERGY STAR certified
- Light and compact
Cons
- Certified for only about 84 sq ft
- No genuine replacement filter is listed yet
- No sensor or auto mode
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its room size. How we rank explains each one.
Specifications
| Model number | CVA10B |
|---|---|
| Performance | |
| Smoke CADR | 54 cfm |
| Dust CADR | 59 cfm |
| Pollen CADR | 83 cfm |
| PM2.5 CADR | 56 cfm |
| CADR certified by | AHAM Verifide |
| Room size (AHAM) | 84 sq ft |
| Coverage (maker) | 448.5 sq ft |
| Noise | 34 dB |
| Efficiency | |
| Efficiency (IEF) | 10.3 cfm/W |
| ENERGY STAR | Yes |
| Energy use | 32 kWh/year |
| Filters | |
| Filter | HEPA |
| CARB certified (ozone) | Yes |
| Controls and build | |
| Air-quality sensor | None |
| Auto mode | No |
| Wi-Fi app | No |
| Fan speeds | 3 |
| Dimensions | 12.6 x 7.26 x 7.26 in |
| Weight | 4 lb |
Alternatives in this room size
Levoit Vital 100S
#2 in Small roomsFull review
A slim smart purifier for a bedroom, especially with pets. It cleans about as much air as the Core 300 but adds auto mode and Wi-Fi.
Amazon $119.99$119.99
Jafanda JF280
#4 in Small roomsFull review
Strong value for a bedroom up to about 210 sq ft, with a PM2.5 sensor and auto mode at $60.
Amazon $59.99$59.99
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