42W 12" Solar Attic Fan with Smart Power Adapter+Remote
Premium Solar Attic Fan
LANGY 42W Solar Attic Fan
Reduce HVAC Costs Up to 40% & Protect Your Home Year-Round
Key Features & Benefits
Slash HVAC Costs
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.
Smart Thermostat Control
Built-in preset thermostat for automatic operation:
- Automatically starts at 77°F
- Automatically stops at 73°F
This feature can be disabled for manual control.
Quite & Maintenance-Free
42W high-efficiency solar panel provides quiet, clean energy operation.
Low noise level and no maintenance required
Built to Last
Steel support parts guarrantee solid structures and aluminum alloy frame delivers lightweight and conveniences
Hybrid solar + AC power ensures non-stop airflow 24/7.
10-Year Limited Warranty
Smart Thermostat Operation
The fan features intelligent thermostat control to optimize energy efficiency and maintain ideal attic conditions automatically.
73°F OFF
77°F ON
Cool
Comfortable
Hot
The fan automatically activates when attic temperature reaches 77°F and stops when it cools to 73°F, maintaining optimal conditions without manual intervention.
Technical Specifications
Download Full Specifications (PDF)
| 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 ※ |
24/7 Hybrid Power Operation
The LANGY 42W's hybrid power system ensures continuous operation regardless of weather conditions, providing year-round attic ventilation.
Daytime Operation
Powered by high-efficiency solar panels using clean, renewable energy
42W solar panel provides ample power for maximum airflow
Night & Cloudy Days
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.
DIY-Friendly Installation
Installation is intuitive and a breeze
Video Guide
Step-by-step installation video
All Hardware
Everything included
Leak-Proof
Watertight design
Quick Setup
1-2 hours installation
Before you pay
Check the method and total at checkout.
When it ships
Allow for processing time as well as the journey to you.
Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.
Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.
View policyIf you need a refund
Keep your order number and contact the store to start.
Please contact us for the refund processing timeframe before returning an item.
View policyDelivery costs
Review the cost for your destination and chosen service.
Standard Shipping · United States: $0.00
Express Shipping · United States: $3.99
View policyReturning an item
Check the return conditions before sending anything back.
United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.
View policy