QuietCool AFR SLR-40 Solar Roof Fan
#7 in Roof mountFull review
For a medium attic on a roof that faces away from the sun, where the tilting panel earns its keep. On a south facing roof the 25 W model is better value.
QuietCool $439$439
3.0/5
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.
- 927 CFMAirflow
- 25 WPanel
- 1,200 sq ftAttic area
- 15 yearsWarranty
Check price at Amazon$309Check price at QuietCool$279
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Runs day and night on the included AC/DC adapter
- Adjustable thermostat lets you set when it kicks in
- A 15 year warranty from an established attic fan maker
- Airflow published to a stated test condition, with a separate HVI figure
Cons
- Small 25 W panel and the lowest airflow of the QuietCool roof fans, sized for attics up to 1,200 sq ft
- The panel is fixed flat in the hood, so it cannot be angled toward the sun
The QuietCool Solar Roof family
Every QuietCool Solar Roof model we rank, smallest first. Ratings compare each against its own mount.
| Model | Airflow | Rating | Price |
|---|---|---|---|
| QuietCool AFR SLR-25 Solar Roof Fan (this one) | 927 CFM | 3.0/5 | $279 |
| QuietCool AFR SLR-40 Solar Roof Fan | 1,085 CFM | 3.3/5 | $439 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its mount. How we rank explains each one.
Specifications
| Model number | AFR SLR-25 |
|---|---|
| Airflow | |
| Mount | Roof |
| Airflow | 927 CFM |
| Attic area | 1,200 sq ft |
| Motor | 24V brushless DC, IP67 |
| Power | |
| Panel | 25 W |
| Separate or tilting panel | No |
| Thermostat | Yes |
| AC backup | Yes |
| Build | |
| Warranty | 15 years |
Alternatives in this mount
OmniPV OP-SAF-40 Hybrid Solar Attic Fan
#8 in Roof mountFull review
A hybrid roof fan with a thermostat for a medium attic at a fair price. The newer 50 W model is the better buy if the price gap stays small.
Amazon $299.90$299.90
DC House 32W Solar Attic Fan
#10 in Roof mountFull review
A low cost, solar only fan for a shed, garage or small attic where any extra airflow helps. The airflow claim and short coverage make it a gamble for a whole house.
Amazon $149.99$149.99
Compare
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