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 2.3. The QuietCool AFR SLR-25 Solar Roof Fan leads on warranty and features. The Master Flow PRSOLAR2 Solar Roof Vent wins on panel. The QuietCool AFR SLR-25 Solar Roof Fan costs $151.54 less ($309 vs $460.54).
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 PRSOLAR2 Solar Roof Vent
#18 in Roof mountFull review
For a medium attic where a low profile look and a GAF warranty with labor cover matter more than airflow per dollar.
Amazon $460.54$460.54
Which should you buy?
- Choose the QuietCool AFR SLR-25 Solar Roof Fan for warranty (15-year warranty vs 6-year warranty) and features (thermostat, AC backup vs thermostat).
- Choose the Master Flow PRSOLAR2 Solar Roof Vent for panel (35 W panel vs 25 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 PRSOLAR2 Solar Roof Vent |
|---|---|---|
| Overall rating | 3.0/5 | 2.3/5 |
| Value 25% | 33 $0.33 per CFM ($309, 927 CFM) | 0 $0.61 per CFM ($460.54, 750 CFM) |
| Airflow 15% | 17 927 CFM | 8 750 CFM |
| Panel 20% | 30 25 W panel | 50 35 W panel |
| Features 15% | 70 thermostat, AC backup | 40 thermostat |
| Warranty 25% | 58 15-year warranty | 21 6-year warranty |
Specifications
| QuietCool AFR SLR-25 Solar Roof Fan | Master Flow PRSOLAR2 Solar Roof Vent | |
|---|---|---|
| Airflow | ||
| Mount | Roof | Roof |
| Airflow | 927 CFM | 750 CFM |
| Attic area | 1,200 sq ft | 1,070 sq ft |
| Motor | 24V brushless DC, IP67 | - |
| Power | ||
| Panel | 25 W | 35 W |
| Separate or tilting panel | No | - |
| Thermostat | Yes | Yes |
| AC backup | Yes | No |
| Build | ||
| Weight | - | 23 lb |
| Warranty | 15 years | 6 years |