The Remington Solar 30W Solar Attic Fan rates 3.7 among roof mount solar attic fans; the QuietCool AFG SLR-40 Solar Gable Fan rates 3.7 among gable mount ones. The QuietCool AFG SLR-40 Solar Gable Fan costs $39 less ($359 vs $398).
For a homeowner who wants a fan to fit once and forget, with a lifetime warranty and humidity control. Budget fans move more air per dollar but carry little or no warranty.
Amazon $398The 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 $359Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
These two sit in different mount classes (roof mount and gable mount), and each is scored against the reference points for its own class, so a rating says how well each does among its own mount peers. How we rank explains each factor.
| Factor weight | Remington Solar 30W Solar Attic Fan | QuietCool AFG SLR-40 Solar Gable Fan |
|---|---|---|
| Overall rating | 3.7/5 | 3.7/5 |
| Value 25% | 40 $0.29 per CFM ($398, 1,350 CFM credited of 1,550 claimed (45 per panel watt)) | 54 $0.23 per CFM ($359, 1,566 CFM) |
| Airflow 15% | 39 1,350 CFM credited of 1,550 claimed (45 per panel watt) | 51 1,566 CFM |
| Panel 20% | 40 30 W panel | 60 40 W panel |
| Features 15% | 100 thermostat, AC backup, separate or tilting panel | 100 thermostat, AC backup, separate or tilting panel |
| Warranty 25% | 100 lifetime warranty | 58 15-year warranty |
| Remington Solar 30W Solar Attic Fan | QuietCool AFG SLR-40 Solar Gable Fan | |
|---|---|---|
| Airflow | ||
| Mount | Roof | Gable |
| Airflow | 1,550 CFM | 1,566 CFM |
| Attic area | 2,000 sq ft | 2,000 sq ft |
| Motor | brushless DC | 24V brushless DC, IP67 |
| Power | ||
| Panel | 30 W | 40 W |
| Separate or tilting panel | Yes | Yes |
| Thermostat | Yes | Yes |
| AC backup | Yes | Yes |
| Build | ||
| Weight | 30 lb | - |
| Warranty | Lifetime | 15 years |
