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Product description
Wide Selection – Different Materials and Styles for You to Choose from 
Available in either galvanized steel or stainless steel, with options for both single and dual spring configurations.
Installation Steps 
Easy Install & Low Maintenance Design
Perfect for Home Greenhouses, Cold Frames & Sheds 
Boost Seed Germination & Prevent Seedling Overheating
No Batteries or Electricity Needed 
Does this window opener require batteries or an electrical outlet?
No batteries needed! This automatic greenhouse window opener is solar heat sensitive. The cylinder expands with heat to open windows, offering non-electric greenhouse ventilation and an eco-friendly automatic vent kit.
What is the maximum weight capacity and what windows does it fit?
This heavy duty model lifts a 33lbs lifting weight. As a versatile window opener for greenhouse, it fits most greenhouse roof vent kits and cold frames, easily handling heavy polycarbonate or glass panels with its robust arm.
Will the materials rust or degrade if left out in the rain and sun?
No. Built with anodized galvanized steel, this durable greenhouse opener is corrosion-resistant against rain and UV. The design ensures it remains a stable, rust-proof greenhouse accessory even in high-humidity environments.
Is it difficult to install? Do I need to buy extra parts?
Installation is simple! This easy install window opener includes all greenhouse accessories like clamps and screws. No extra parts are required to set up your DIY automatic ventilation system and start regulating airflow quickly.
How long does it last and what is the operating temperature?
It lasts years and triggers at 60-77°F (15-25°C). This auto vent opener provides precise greenhouse climate control, acting as a temperature controlled vent that opens up to 18 inches to protect plants season after season.
Other Styles of Window Openers
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Customer Reviews
4.1 out of 5 stars 27
4.1 out of 5 stars 27
4.3 out of 5 stars 78
4.3 out of 5 stars 78
4.3 out of 5 stars 78
4.3 out of 5 stars 78
4.8 out of 5 stars 13
Price
$31.99$31.99
$34.99$34.99
$29.99$29.99
$33.99$33.99
$31.99$31.99
$33.99$33.99
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Type
Auto Vent Opener
Auto Vent Opener
Auto Vent Opener
Auto Vent Opener
Auto Vent Opener
Auto Vent Opener
Replacement Cylinder
Quantity
1/2 Pack
1/2 Pack
1/2 Pack
1/2 Pack
1/2 Pack
1/2 Pack
1 Pack
Material
Aluminum, stainless steel
Aluminum, stainless steel
Aluminum, stainless steel
Aluminum, stainless steel
Galvanized
Galvanized
Aluminum, stainless steel
Suitable for Greenhouse
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TEMPERATURE-ACTIVATED AUTOMATIC VENTILATION: This automatic greenhouse window opener features a solar heat sensitive hydraulic cylinder that triggers between 60°F – 77°F (15°C-25°C). It reaches a maximum opening distance of 18 inches, ensuring optimal airflow without manual monitoring. It responds very accurately to temperature changes and works like a charm season after season
ECO-FRIENDLY & NO BATTERIES REQUIRED: Utilizing solar thermal energy, this non-electric auto vent kit is entirely self-sufficient. The gas-filled cylinder expands to open the vent and contracts as temperatures drop. It’s a set and forget device—no more running out to the greenhouse every time the sun comes out
Temperature-Controlled Ventilation for Your Greenhouse: Our automatic window opener efficiently regulates your greenhouse climate by responding to temperature changes. As the temperature rises, the gas-filled cylinder expands, automatically opening the window. When the temperature drops, the spring mechanism smoothly closes the window, ensuring optimal airflow and temperature control.
UNIVERSAL DESIGN & HEAVY-DUTY LIFTING: This versatile window opener for greenhouse is compatible with most roof vents, side-hung, or upward-hung windows in greenhouses, sheds, and cold frames. Includes all necessary greenhouse supplies (clamps and screws) for a hassle-free install. This thing is beefy and has no problem lifting reinforced PC panels
EASY INSTALLATION & RELIABLE PERFORMANCE: This maintenance-free greenhouse vent opener ensures smooth operation for all gardeners, allowing you to focus on plant care. Installation is straightforward even for someone who isn’t very handy, fitting perfectly on most standard greenhouse frames
$32.99