QuietCool AFG SLR-40 Solar Gable Fan
#1 in Gable mountFull review
The best documented gable fan here, for an attic with a gable vent big enough to let its air out. Its long warranty and included adapter justify the price.
QuietCool $359$359
3.3/5
A hybrid gable fan with a strong airflow claim at a mid range price, for a buyer who can live without a stated warranty.
- 2,100 CFMAirflow
- 40 WPanel
Check price at Amazon$268.99
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- AC adapter included for night running
- Highest rated airflow of the gable fans
- Mounts on a wall or behind a gable vent
Cons
- Fixed 75°F thermostat cannot be adjusted
- No published warranty or attic area rating
- The airflow rating has no stated test condition
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-SWF-40 |
|---|---|
| Airflow | |
| Mount | Gable |
| Airflow | 2,100 CFM |
| Motor | brushless DC |
| Power | |
| Panel | 40 W |
| Thermostat | Yes |
| AC backup | Yes |
| Build | |
| Weight | 12 lb |
Alternatives in this mount
QuietCool AFG SLR SMT 50W Gable Fan
#3 in Gable mountFull review
For a gable vented attic where the owner wants app control and steady airflow around the clock, at the same price as the simpler AFG SLR-40.
Amazon $359$359
VEVOR 14 in Solar Gable Fan
#4 in Gable mountFull review
A low cost gable fan for a garage, shop or small attic where a short warranty is acceptable.
Amazon $145.90$145.90
Compare
Compare the OmniPV OP-SWF-40 Solar Gable Fan with any other solar attic fan →
More from OmniPV: every OmniPV product ranked.