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
The QuietCool AFG SLR SMT 50W Gable Fan is the better solar attic fan overall, rated 3.3 to 2.2. The QuietCool AFG SLR SMT 50W Gable Fan leads on panel and features. The Master Flow PGSOLAR Solar Gable Fan costs $124.05 less ($234.95 vs $359).
Master Flow PGSOLAR Solar Gable Fan
#5 in Gable mountFull review
For a small attic with a gable vent where a known roofing brand and a labor backed warranty matter more than airflow.
Amazon $234.95$234.95
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.
Which should you buy?
- Choose the QuietCool AFG SLR SMT 50W Gable Fan for panel (50 W panel vs 15 W panel) and features (thermostat, AC backup vs separate or tilting panel).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every gable mount solar attic fan; a clear win is highlighted. How we rank explains each one.
| Factor weight | QuietCool AFG SLR SMT 50W Gable Fan | Master Flow PGSOLAR Solar Gable Fan |
|---|---|---|
| Overall rating | 3.3/5 | 2.2/5 |
| Value 25% | 61 $0.20 per CFM ($359, 1,780 CFM) | 30 $0.35 per CFM ($234.95, 675 CFM credited of 685 claimed (45 per panel watt)) |
| Airflow 15% | 62 1,780 CFM | 4 675 CFM credited of 685 claimed (45 per panel watt) |
| Panel 20% | 80 50 W panel | 10 15 W panel |
| Features 15% | 70 thermostat, AC backup | 30 separate or tilting panel |
| Warranty 25% | 0 warranty not published, scored as none | 17 5-year warranty |
Specifications
| QuietCool AFG SLR SMT 50W Gable Fan | Master Flow PGSOLAR Solar Gable Fan | |
|---|---|---|
| Airflow | ||
| Mount | Gable | Gable |
| Airflow | 1,780 CFM | 685 CFM |
| Attic area | 2,250 sq ft | 800 sq ft |
| Motor | DC | - |
| Power | ||
| Panel | 50 W | 15 W |
| Separate or tilting panel | - | Yes |
| Thermostat | Yes | - |
| AC backup | Yes | No |
| Build | ||
| Weight | - | 27 lb |
| Warranty | - | 5 years |
| Released | 2026-09 | - |