The iLiving 40W Hybrid Solar Attic Fan is the better solar attic fan overall, rated 3.4 to 3.3. The iLiving 40W Hybrid Solar Attic Fan costs $94.01 less ($344.99 vs $439).
A well equipped hybrid roof fan with a long warranty at a mid range price, for medium attics. Buy the 301A, which includes the night adapter for the same price as the 301.
Amazon $344.99For 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 $439Prices 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.
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 | iLiving 40W Hybrid Solar Attic Fan | QuietCool AFR SLR-40 Solar Roof Fan |
|---|---|---|
| Overall rating | 3.4/5 | 3.3/5 |
| Value 25% | 39 $0.30 per CFM ($344.99, 1,150 CFM) | 22 $0.40 per CFM ($439, 1,085 CFM) |
| Airflow 15% | 29 1,150 CFM | 26 1,085 CFM |
| Panel 20% | 60 40 W panel | 60 40 W panel |
| Features 15% | 100 thermostat, AC backup, separate or tilting panel | 100 thermostat, AC backup, separate or tilting panel |
| Warranty 25% | 58 15-year warranty | 58 15-year warranty |
| iLiving 40W Hybrid Solar Attic Fan | QuietCool AFR SLR-40 Solar Roof Fan | |
|---|---|---|
| Airflow | ||
| Mount | Roof | Roof |
| Airflow | 1,150 CFM | 1,085 CFM |
| Attic area | 2,900 sq ft | 1,450 sq ft |
| Fan | 14 in | - |
| Motor | brushless, IP68 | 24V brushless DC, IP67 |
| Power | ||
| Panel | 40 W | 40 W |
| Separate or tilting panel | Yes | Yes |
| Thermostat | Yes | Yes |
| AC backup | Yes | Yes |
| Build | ||
| Weight | 32 lb | - |
| Warranty | 15 years | 15 years |
| Released | 2020-05 | - |
