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 SMT 50W Gable Fan rates 3.3 among gable mount ones. The QuietCool AFG SLR SMT 50W Gable Fan costs $130 less ($359 vs $489).
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
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 SMT 50W Gable Fan |
|---|---|---|
| Overall rating | 3.9/5 | 3.3/5 |
| Value 25% | 34 $0.33 per CFM ($489, 1,500 CFM) | 61 $0.20 per CFM ($359, 1,780 CFM) |
| Airflow 15% | 47 1,500 CFM | 62 1,780 CFM |
| Panel 20% | 60 40 W panel | 80 50 W panel |
| Features 15% | 100 thermostat, AC backup, separate or tilting panel | 70 thermostat, AC backup |
| Warranty 25% | 100 lifetime warranty | 0 warranty not published, scored as none |
Specifications
| Remington Solar Builder Series 40W | QuietCool AFG SLR SMT 50W Gable Fan | |
|---|---|---|
| Airflow | ||
| Mount | Roof | Gable |
| Airflow | 1,500 CFM | 1,780 CFM |
| Attic area | 2,400 sq ft | 2,250 sq ft |
| Motor | brushless DC | DC |
| Power | ||
| Panel | 40 W | 50 W |
| Separate or tilting panel | Yes | - |
| Thermostat | Yes | Yes |
| AC backup | Yes | Yes |
| Build | ||
| Weight | 31 lb | - |
| Warranty | Lifetime | - |
| Released | - | 2026-09 |