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 3.3. The Remington Solar Builder Series 40W leads on features and panel. The Remington Solar Builder Series 40W costs $40.95 less ($489 vs $529.95).
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.
Natural Light SAF35 Low Profile Fan
#10 in Roof mountFull review
For a south or west facing roof where looks matter and the owner wants a lifetime warranty. On a roof that faces away from the sun, a tilting panel does better.
Amazon $529.95$529.95
Which should you buy?
- Choose the Remington Solar Builder Series 40W for features (thermostat, AC backup, separate or tilting panel vs none of the three) and panel (40 W panel vs 35 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 | Natural Light SAF35 Low Profile Fan |
|---|---|---|
| Overall rating | 3.9/5 | 3.3/5 |
| Value 25% | 34 $0.33 per CFM ($489, 1,500 CFM) | 32 $0.34 per CFM ($529.95, 1,575 CFM credited of 1,599 claimed (45 per panel watt)) |
| Airflow 15% | 47 1,500 CFM | 51 1,575 CFM credited of 1,599 claimed (45 per panel watt) |
| Panel 20% | 60 40 W panel | 50 35 W panel |
| Features 15% | 100 thermostat, AC backup, separate or tilting panel | 0 none of the three |
| Warranty 25% | 100 lifetime warranty | 100 lifetime warranty |
Specifications
| Remington Solar Builder Series 40W | Natural Light SAF35 Low Profile Fan | |
|---|---|---|
| Airflow | ||
| Mount | Roof | Roof |
| Airflow | 1,500 CFM | 1,599 CFM |
| Attic area | 2,400 sq ft | 2,400 sq ft |
| Motor | brushless DC | DC |
| Power | ||
| Panel | 40 W | 35 W |
| Separate or tilting panel | Yes | No |
| Thermostat | Yes | No |
| AC backup | Yes | No |
| Build | ||
| Weight | 31 lb | - |
| Warranty | Lifetime | Lifetime |