Remington Solar Builder Series 40W
#1 in Roof mountFull review
For a larger attic where the owner wants night running and a lifetime fan warranty in one box. The price is hard to justify on airflow alone.
Amazon $489$489
The Remington Solar Builder Series 40W is the better solar attic fan overall, rated 3.9 to 3.7. The Remington Solar Builder Series 40W leads on panel. The Remington Solar 30W Solar Attic Fan costs $91 less ($398 vs $489).
Remington Solar 30W Solar Attic Fan
#2 in Roof mountFull review
For a homeowner who wants a fan to fit once and forget, with a lifetime warranty and humidity control. Budget fans move more air per dollar but carry little or no warranty.
Amazon $398$398
Prices 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.
Which should you buy?
- Choose the Remington Solar Builder Series 40W for panel (40 W panel vs 30 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 | Remington Solar Builder Series 40W | Remington Solar 30W Solar Attic Fan |
|---|---|---|
| Overall rating | 3.9/5 | 3.7/5 |
| Value 25% | 34 $0.33 per CFM ($489, 1,500 CFM) | 40 $0.29 per CFM ($398, 1,350 CFM credited of 1,550 claimed (45 per panel watt)) |
| Airflow 15% | 47 1,500 CFM | 39 1,350 CFM credited of 1,550 claimed (45 per panel watt) |
| Panel 20% | 60 40 W panel | 40 30 W panel |
| Features 15% | 100 thermostat, AC backup, separate or tilting panel | 100 thermostat, AC backup, separate or tilting panel |
| Warranty 25% | 100 lifetime warranty | 100 lifetime warranty |
Specifications
| Remington Solar Builder Series 40W | Remington Solar 30W Solar Attic Fan | |
|---|---|---|
| Airflow | ||
| Mount | Roof | Roof |
| Airflow | 1,500 CFM | 1,550 CFM |
| Attic area | 2,400 sq ft | 2,000 sq ft |
| Motor | brushless DC | brushless DC |
| Power | ||
| Panel | 40 W | 30 W |
| Separate or tilting panel | Yes | Yes |
| Thermostat | Yes | Yes |
| AC backup | Yes | Yes |
| Build | ||
| Weight | 31 lb | 30 lb |
| Warranty | Lifetime | Lifetime |