QuietCool AFR SLR-25 Solar Roof Fan
#13 in Roof mountFull review
For a small attic where a low cost hybrid fan with a long warranty matters more than airflow. Larger attics need the 40 W model or two fans.
Amazon $309$309
The QuietCool AFR SLR-25 Solar Roof Fan is the better solar attic fan overall, rated 3.0 to 1.9. The QuietCool AFR SLR-25 Solar Roof Fan leads on warranty, features and panel. The Master Flow ERVSOLAR Solar Roof Vent costs $19.05 less ($289.95 vs $309).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Master Flow ERVSOLAR Solar Roof Vent
#20 in Roof mountFull review
For a small attic where a roofing brand warranty with labor cover matters more than airflow per dollar.
Amazon $289.95$289.95
Which should you buy?
- Choose the QuietCool AFR SLR-25 Solar Roof Fan for warranty (15-year warranty vs 5-year warranty), features (thermostat, AC backup vs separate or tilting panel) and panel (25 W panel vs 15 W panel).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every roof mount solar attic fan; a clear win is highlighted. How we rank explains each one.
| Factor weight | QuietCool AFR SLR-25 Solar Roof Fan | Master Flow ERVSOLAR Solar Roof Vent |
|---|---|---|
| Overall rating | 3.0/5 | 1.9/5 |
| Value 25% | 33 $0.33 per CFM ($309, 927 CFM) | 5 $0.55 per CFM ($289.95, 525 CFM) |
| Airflow 15% | 17 927 CFM | 0 525 CFM |
| Panel 20% | 30 25 W panel | 10 15 W panel |
| Features 15% | 70 thermostat, AC backup | 30 separate or tilting panel |
| Warranty 25% | 58 15-year warranty | 17 5-year warranty |
Specifications
| QuietCool AFR SLR-25 Solar Roof Fan | Master Flow ERVSOLAR Solar Roof Vent | |
|---|---|---|
| Airflow | ||
| Mount | Roof | Roof |
| Airflow | 927 CFM | 525 CFM |
| Attic area | 1,200 sq ft | 800 sq ft |
| Motor | 24V brushless DC, IP67 | 24V brushless DC |
| Power | ||
| Panel | 25 W | 15 W |
| Separate or tilting panel | No | Yes |
| Thermostat | Yes | - |
| AC backup | Yes | No |
| Build | ||
| Weight | - | 20 lb |
| Warranty | 15 years | 5 years |