HGinline 40W Solar Attic Fan
#8 in Roof mountFull review
A flexible hybrid fan with speed control for a buyer who wants night running on a budget. The lack of a stated warranty is the main risk.
Amazon $299.99$299.99
The HGinline 40W Solar Attic Fan is the better solar attic fan overall, rated 3.4 to 3.3. The HGinline 40W Solar Attic Fan leads on features and panel. The HGinline 40W Solar Attic Fan costs $229.96 less ($299.99 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 HGinline 40W Solar Attic Fan 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 | HGinline 40W Solar Attic Fan | Natural Light SAF35 Low Profile Fan |
|---|---|---|
| Overall rating | 3.4/5 | 3.3/5 |
| Value 25% | 71 $0.17 per CFM ($299.99, 1,800 CFM credited of 2,000 claimed (45 per panel watt)) | 32 $0.34 per CFM ($529.95, 1,575 CFM credited of 1,599 claimed (45 per panel watt)) |
| Airflow 15% | 63 1,800 CFM credited of 2,000 claimed (45 per panel watt) | 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% | 0 warranty not published, scored as none | 100 lifetime warranty |
Specifications
| HGinline 40W Solar Attic Fan | Natural Light SAF35 Low Profile Fan | |
|---|---|---|
| Airflow | ||
| Mount | Roof | Roof |
| Airflow | 2,000 CFM | 1,599 CFM |
| Attic area | 2,500 sq ft | 2,400 sq ft |
| Fan | 12 in | - |
| 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 | 26.5 lb | - |
| Warranty | - | Lifetime |