OmniPV OP-SWF-40 Solar Gable Fan
#2 in Gable mountFull review
A hybrid gable fan with a strong airflow claim at a mid range price, for a buyer who can live without a stated warranty.
Amazon $268.99$268.99
3.7/5
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.
- 1,566 CFMAirflow
- 40 WPanel
- 2,000 sq ftAttic area
- 15 yearsWarranty
Check price at QuietCool$359
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- No new hole in the roof: it mounts behind an existing gable vent
- Runs day and night on the included AC/DC adapter
- Panel on a 30 ft cord can go wherever the sun is best
- A 15 year warranty and an adjustable thermostat
Cons
- The HVI rating through a standard louver is under half the headline figure, so louver size matters
- Sold through the QuietCool store rather than Amazon
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 | AFG SLR-40 |
|---|---|
| Airflow | |
| Mount | Gable |
| Airflow | 1,566 CFM |
| Attic area | 2,000 sq ft |
| Motor | 24V brushless DC, IP67 |
| Power | |
| Panel | 40 W |
| Separate or tilting panel | Yes |
| Thermostat | Yes |
| AC backup | Yes |
| Build | |
| Warranty | 15 years |
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
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