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
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.
- 1,780 CFMAirflow
- 50 WPanel
- 2,250 sq ftAttic area
Check price at Amazon$359
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Phone app shows attic temperature and humidity and controls the fan
- Highest rated airflow of the documented gable fans, with house power filling in by day and at night
- Vent covers included to stop backdrafts in winter
- Mounts behind an existing gable vent
Cons
- No warranty term published for this model yet
- The Amazon listing mixes in specs from an AC only model, so check what ships
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 SMT-50W |
|---|---|
| Airflow | |
| Mount | Gable |
| Airflow | 1,780 CFM |
| Attic area | 2,250 sq ft |
| Motor | DC |
| Power | |
| Panel | 50 W |
| Thermostat | Yes |
| AC backup | Yes |
| Build | |
| Released | 2026-09 |
Alternatives in this mount
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
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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