HGinline 40W Solar Attic Fan
#6 in Roof mountFull review
A flexible hybrid fan with speed control for a buyer who wants night running on a budget. The lack of a stated warranty is the main risk.
Amazon $299.99$299.99
3.2/5
A hybrid roof fan with a thermostat for a medium attic at a fair price. The newer 50 W model is the better buy if the price gap stays small.
- 2,100 CFMAirflow
- 40 WPanel
Check price at Amazon$299.90
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- AC adapter included for night running
- Aluminum body suits coastal homes
- Thermostat stops it running in cool weather
Cons
- Fixed 75°F thermostat cannot be adjusted
- No published warranty or attic area rating
- The newer OP-SAF-50 costs only about $50 more for a bigger panel and adjustable controls
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its mount. How we rank explains each one.
Specifications
| Model number | OP-SAF-40 |
|---|---|
| Airflow | |
| Mount | Roof |
| Airflow | 2,100 CFM |
| Motor | brushless DC |
| Power | |
| Panel | 40 W |
| Thermostat | Yes |
| AC backup | Yes |
| Build | |
| Weight | 17.2 lb |
Alternatives in this mount
QuietCool AFR SLR-40 Solar Roof Fan
#7 in Roof mountFull review
For a medium attic on a roof that faces away from the sun, where the tilting panel earns its keep. On a south facing roof the 25 W model is better value.
QuietCool $439$439
QuietCool AFR SLR-25 Solar Roof Fan
#9 in Roof mountFull review
For a small attic where a low cost hybrid fan with a long warranty matters more than airflow. Larger attics need the 40 W model or two fans.
Amazon $309 QuietCool $279$279
Compare
Compare the OmniPV OP-SAF-40 Hybrid Solar Attic Fan with any other solar attic fan →
More from OmniPV: every OmniPV product ranked.