OmniPV OP-SAF-40 Hybrid Solar Attic Fan
#8 in Roof mountFull review
A hybrid roof fan with a thermostat for a medium attic at a fair price. The newer 50 W model is the better buy if the price gap stays small.
Amazon $299.90$299.90
The OmniPV OP-SAF-40 Hybrid Solar Attic Fan is the better solar attic fan overall, rated 3.2 to 2.9. The OmniPV OP-SAF-40 Hybrid Solar Attic Fan leads on features and panel. The DC House 32W Solar Attic Fan costs $149.91 less ($149.99 vs $299.90).
DC House 32W Solar Attic Fan
#10 in Roof mountFull review
A low cost, solar only fan for a shed, garage or small attic where any extra airflow helps. The airflow claim and short coverage make it a gamble for a whole house.
Amazon $149.99$149.99
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 OmniPV OP-SAF-40 Hybrid Solar Attic Fan for features (thermostat, AC backup vs none of the three) and panel (40 W panel vs 32 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 | OmniPV OP-SAF-40 Hybrid Solar Attic Fan | DC House 32W Solar Attic Fan |
|---|---|---|
| Overall rating | 3.2/5 | 2.9/5 |
| Value 25% | 72 $0.17 per CFM ($299.90, 1,800 CFM credited of 2,100 claimed (45 per panel watt)) | 98 $0.10 per CFM ($149.99, 1,440 CFM credited of 2,400 claimed (45 per panel watt)) |
| Airflow 15% | 63 1,800 CFM credited of 2,100 claimed (45 per panel watt) | 44 1,440 CFM credited of 2,400 claimed (45 per panel watt) |
| Panel 20% | 60 40 W panel | 44 32 W panel |
| Features 15% | 70 thermostat, AC backup | 0 none of the three |
| Warranty 25% | 0 warranty not published, scored as none | 0 1-year warranty |
Specifications
| OmniPV OP-SAF-40 Hybrid Solar Attic Fan | DC House 32W Solar Attic Fan | |
|---|---|---|
| Airflow | ||
| Mount | Roof | Roof |
| Airflow | 2,100 CFM | 2,400 CFM |
| Attic area | - | 3,000 sq ft |
| Fan | - | 9 in |
| Motor | brushless DC | brushless, IP68 |
| Power | ||
| Panel | 40 W | 32 W |
| Thermostat | Yes | - |
| AC backup | Yes | No |
| Build | ||
| Weight | 17.2 lb | - |
| Warranty | - | 1 year |