Remington Solar Builder Series 40W
#1 in Roof mountFull review
For a larger attic where the owner wants night running and a lifetime fan warranty in one box. The price is hard to justify on airflow alone.
Amazon $489$489
The Remington Solar Builder Series 40W rates 3.9 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 $130 less ($359 vs $489).
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
Prices 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.
Scores side by side
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 Builder Series 40W | QuietCool AFG SLR-40 Solar Gable Fan |
|---|---|---|
| Overall rating | 3.9/5 | 3.7/5 |
| Value 25% | 34 $0.33 per CFM ($489, 1,500 CFM) | 54 $0.23 per CFM ($359, 1,566 CFM) |
| Airflow 15% | 47 1,500 CFM | 51 1,566 CFM |
| Panel 20% | 60 40 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 |
Specifications
| Remington Solar Builder Series 40W | QuietCool AFG SLR-40 Solar Gable Fan | |
|---|---|---|
| Airflow | ||
| Mount | Roof | Gable |
| Airflow | 1,500 CFM | 1,566 CFM |
| Attic area | 2,400 sq ft | 2,000 sq ft |
| Motor | brushless DC | 24V brushless DC, IP67 |
| Power | ||
| Panel | 40 W | 40 W |
| Separate or tilting panel | Yes | Yes |
| Thermostat | Yes | Yes |
| AC backup | Yes | Yes |
| Build | ||
| Weight | 31 lb | - |
| Warranty | Lifetime | 15 years |