Reduce HVAC Costs Up to 40% & Protect Your Home Year-Round
Winter: Prevents moisture buildup, reducing mold, rot, and insulation damage risks.
Summer: Reduces attic temperatures by up to 40°F, lowering AC workload and energy bills.
Built-in preset thermostat for automatic operation:
This feature can be disabled for manual control.
42W high-efficiency solar panel provides quiet, clean energy operation.
Low noise level and no maintenance required
Steel support parts guarrantee solid structures and aluminum alloy frame delivers lightweight and conveniences
Hybrid solar + AC power ensures non-stop airflow 24/7.
The fan features intelligent thermostat control to optimize energy efficiency and maintain ideal attic conditions automatically.
The fan automatically activates when attic temperature reaches 77°F and stops when it cools to 73°F, maintaining optimal conditions without manual intervention.
| Model | SF-42 |
|---|---|
| Solar Panel Power | 18V/42W |
| Solar Panel Size | 20.2" x 17.75" |
| Airflow | Up to 1200 CFM |
| Coverage Area | 2,200 sq/ft |
| Adapter Voltage | 100-240V AC, 50/60 Hz |
| Fan Speeds | 8 levels |
| Controls | Built-in Preset Thermostat |
|---|---|
| Motor Type | DC 30W |
| Cap Dimension | 18.25" x 18.25" |
| Rough Cut-out | 12.3" x 12.3" |
| Flashing size | 22" x 22" |
| Remote control distance | 65ft |
| Warranty | 10 Years |
| Model | SF-42 |
|---|---|
| Solar Panel Power | 18V/42W |
| Solar Panel Size | 20.2" x 17.75" |
| Coverage Area | 2,200 sq/ft |
| Solar Panel Size | Up to 1200 CFM |
| Adapter Voltage | 100-240V AC, 50/60 Hz |
| Fan Speeds | 8 levels |
| Controls | Built-in Preset Thermostat |
| Motor Type | DC 30W |
| Cap Dimension | 18.25" x 18.25" |
| Rough Cut-out | 12.3" x 12.3" |
| Flashing size | 22" x 22" |
| Remote control distance | 65ft |
| Warranty | 10 Years ※ |
The LANGY 42W's hybrid power system ensures continuous operation regardless of weather conditions, providing year-round attic ventilation.
Powered by high-efficiency solar panels using clean, renewable energy
42W solar panel provides ample power for maximum airflow
Automatically switches to AC power when solar is insufficient or unavailable.
The adapter is a great supplement for the solar supply. And they can work independently.
The hybrid power system ensures your attic stays ventilated day and night, 365 days a year.
Installation is intuitive and a breeze
Step-by-step installation video
Everything included
Watertight design
1-2 hours installation
