The QuietCool AFR SLR SMT 50W Roof Fan is the better solar attic fan overall, rated 2.8 to 2.3. The QuietCool AFR SLR SMT 50W Roof Fan leads on panel and features. The Maxx Air CX1025SOL Solar Attic Fan costs $69.01 less ($369.99 vs $439).
For a homeowner who wants to watch and control attic conditions from a phone and run around the clock. Buyers after the most airflow per dollar should look elsewhere.
Amazon $439.99 QuietCool $439A plain solar only roof fan for a small attic. Other fans with bigger panels and adapters cost less.
Amazon $369.99Prices 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 | QuietCool AFR SLR SMT 50W Roof Fan | Maxx Air CX1025SOL Solar Attic Fan |
|---|---|---|
| Overall rating | 2.8/5 | 2.3/5 |
| Value 25% | 24 $0.39 per CFM ($439, 1,119 CFM) | 29 $0.36 per CFM ($369.99, 1,030 CFM) |
| Airflow 15% | 27 1,119 CFM | 23 1,030 CFM |
| Panel 20% | 80 50 W panel | 30 25 W panel |
| Features 15% | 70 thermostat, AC backup | 40 thermostat |
| Warranty 25% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
| QuietCool AFR SLR SMT 50W Roof Fan | Maxx Air CX1025SOL Solar Attic Fan | |
|---|---|---|
| Airflow | ||
| Mount | Roof | Roof |
| Airflow | 1,119 CFM | 1,030 CFM |
| Attic area | 1,500 sq ft | 1,000 sq ft |
| Fan | - | 12 in |
| Motor | DC | brushless DC, IP68 |
| Power | ||
| Panel | 50 W | 25 W |
| Separate or tilting panel | - | No |
| Thermostat | Yes | Yes |
| AC backup | Yes | - |
| Build | ||
| Released | 2026-06 | - |
