Top 10 Best automatic greenhouse window opener in 2026

Last Updated - 6/18/2026

🏆Best Choice

PATIOHZ

PATIOHZ Replacement Cylinder for Automatic Vent Opener Temperature Controlled Window Greenhouse Accessories, Automatic Greenhouse Cylinder for Window Openers (Hydraulic Cylinder)

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Energy Efficiency: Non Electric, utilizes solar energy to open or close the greenhouse vents. This greenhouse window opener cylinder promotes a sustainable and energy efficient greenhouse operation.
•Temperature Control Made Easy: With a temperature range of 15°-25°C (60°-77°F), our greenhouse winder is easy to use and ensures your plants stay healthy and happy.
•Durable and Reliable: Designed to withstand various weather conditions, greenhouse vent opener cylinder provides consistent and reliable operation. Greenhouse window cylinder replacement ensures the proper ventilation and climate control required for healthy plant growth.
•Replacement Cylinder Only: Only provides replacement cylinders for your convenience to replace the old greenhouse window opener auto cylinder, window opener is not included, please check carefully.
•[Note]: In order to ensure a good use experience,this cylinder need to be refrigerated for half an hour before use it.Do not use this opener cylinder anywhere the temperature will exceed 50° (122F).

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$17.99

$19.99

-10%

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upstartech

Greenhouse Vent Automatic Opener Greenhouse Accessories Window Opener Auto Vent Kit Sensitive Gardening Tools Automatic Greenhouses Supplies Solar Heat Sensitive Dual Spring Lifts 33lbs (1pc)

9.6

ChoiceComparer.com Score

9.6

/ 10

Outstanding

Main highlights

•【Temperature-Activated Operation】No electricity or batteries required! The greenhouse vent automatic opener automatically opens windows when temperatures rise above 77°F/25°C and fully closes them when temperatures drop below 59°F/15°C. Compatible with most greenhouse windows. Note：Place the cylinder in a chilled environment for approximately 10 minutes. Then take out it, manually extend and retract the cylinder, and reinstall it properly for use.
•【Sturdy Aluminum & Stainless Steel Build】The greenhouse accessories crafted with rust-resistant aluminum and stainless steel for long-lasting performance in humid conditions. The powder-coated aluminum cylinder ensures weatherproof durability. Supports up to 33 lbs (15 kg) and opens windows up to 18 inches (45 cm).
•【Reinforced Dual-Spring System】The window opener features heavy-duty dual springs (not single springs!) for enhanced stability and flexibility, even in strong winds. Quick-close function: During storms, squeeze the longest bracket parts and remove the 8-hole connector to close windows instantly.
•【Easy Installation】The automatic window opener includes rust-resistant screws and mounting clamps. Attach it directly to panels, metal frames, or wooden frames with just a screwdriver—simple and convenient! Comes with an illustrated manual.
•【Save Time, Protect Plants】Never worry about overheating or frost damage! Automates window control 24/7, freeing up hours for plant care.
•【Installation Precautions】Bracket Setup: Detach the small bracket component first, securely tighten all bolts and nuts, then reattach the bracket. Cylinder Adjustment: Use hot water to extend the pneumatic cylinder to its maximum length. While extended, connect it to the T-shaped connector by inserting the thin pin into the outermost hole. This ensures the opener stays within the safe range and avoids overextending past the stop pin.

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$29.99

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upstartech

Greenhouse Vent Automatic Opener Greenhouse Accessories Window Opener Auto Vent Kit Sensitive Gardening Tools Automatic Greenhouses Supplies Solar Heat Sensitive Dual Spring Lifts 33lbs (2pc)

9.4

ChoiceComparer.com Score

9.4

/ 10

Outstanding

Main highlights

•【Temperature-Activated Operation】No electricity or batteries required! The greenhouse vent automatic opener automatically opens windows when temperatures rise above 77°F/25°C and fully closes them when temperatures drop below 59°F/15°C. Compatible with most greenhouse windows. Note：Place the cylinder in a chilled environment for approximately 10 minutes. Then take out it, manually extend and retract the cylinder, and reinstall it properly for use.
•【Sturdy Aluminum & Stainless Steel Build】The greenhouse accessories crafted with rust-resistant aluminum and stainless steel for long-lasting performance in humid conditions. The powder-coated aluminum cylinder ensures weatherproof durability. Supports up to 33 lbs (15 kg) and opens windows up to 18 inches (45 cm).
•【Reinforced Dual-Spring System】The window opener features heavy-duty dual springs (not single springs!) for enhanced stability and flexibility, even in strong winds. Quick-close function: During storms, squeeze the longest bracket parts and remove the 8-hole connector to close windows instantly.
•【Easy Installation】The automatic window opener includes rust-resistant screws and mounting clamps. Attach it directly to panels, metal frames, or wooden frames with just a screwdriver—simple and convenient! Comes with an illustrated manual.
•【Save Time, Protect Plants】Never worry about overheating or frost damage! Automates window control 24/7, freeing up hours for plant care.
•【Installation Precautions】Bracket Setup: Detach the small bracket component first, securely tighten all bolts and nuts, then reattach the bracket. Cylinder Adjustment: Use hot water to extend the pneumatic cylinder to its maximum length. While extended, connect it to the T-shaped connector by inserting the thin pin into the outermost hole. This ensures the opener stays within the safe range and avoids overextending past the stop pin.

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$59.99

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upstartech

Greenhouse Vent Automatic Opener Greenhouse Accessories Window Opener Auto Vent Kit Sensitive Gardening Tools Automatic Greenhouses Supplies Solar Heat Sensitive Lifts 33lbs (4, Coal Black)

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•【Temperature-Activated Operation】No electricity or batteries required! The greenhouse vent automatic opener automatically opens windows when temperatures rise above 77°F/25°C and fully closes them when temperatures drop below 59°F/15°C. Compatible with most greenhouse windows.
•【Sturdy Aluminum & Stainless Steel Build】The greenhouse accessories crafted with rust-resistant aluminum and stainless steel for long-lasting performance in humid conditions. The powder-coated aluminum cylinder ensures weatherproof durability. Supports up to 33 lbs (15 kg) and opens windows up to 18 inches (45 cm).
•【Reinforced Dual-Spring System】The window opener features heavy-duty dual springs (not single springs!) for enhanced stability and flexibility, even in strong winds. Quick-close function: During storms, squeeze the longest bracket parts and remove the 8-hole connector to close windows instantly.
•【Easy Installation】The automatic window opener includes rust-resistant screws and mounting clamps. Attach it directly to panels, metal frames, or wooden frames with just a screwdriver—simple and convenient! Comes with an illustrated manual.
•【Save Time, Protect Plants】Never worry about overheating or frost damage! Automates window control 24/7, freeing up hours for plant care.
•【Installation Precautions】Bracket Setup: Detach the small bracket component first, securely tighten all bolts and nuts, then reattach the bracket. Cylinder Adjustment: Use hot water to extend the pneumatic cylinder to its maximum length. While extended, connect it to the T-shaped connector by inserting the thin pin into the outermost hole. This ensures the opener stays within the safe range and avoids overextending past the stop pin.

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$99.99

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Bayliss Autovents

Bayliss XL Autovent - Automatic Greenhouse Window Opener - Temperature Sensitive Solar Vent Opener

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•Designed to fit most metal and wooden greenhouses
•Electricity free using solar power to automatically open and close your greenhouse windows
•Built from durable and corrosion resistant materials, annodised aluminium and recycled plastic bracketary
•Hand built here in the UK using quality components and guaranteed for 2 years
•Lifting force of over 6kg and has maximum opening range of 30cm
•Please Note that certain greenhouses may require additional fittings when installing your autovent, Halls and Robinsons Greenhouses fittings are available from the Bayliss Website, along with our other autovent products!

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$69.47

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Yosoo

Yosoo Greenhouse Accessories Replacement Window Opener Auto Vent/Automatic Greenhouse Cylinder for Orbesen, Gardman & B&Q Vents

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•This listing is a replacement CYLINDER only, for the full set of auto vent opener you can find it in my shop.
•Window opener is also suitable for Orbesen, Gardman & B & Q vents
•Non-electrical use of solar energy, open or close the greenhouse openings as the temperature rises or falls
•Important Note: Window opener will not work if these openers are used anywhere exceeding the temperature 50 ° (122F).
•If you find a product that does not shrink when it is cold or hot, it may be that the product has reached its maximum length during high temperature transport. You only need to put the product in the refrigerator and remove it after a while , The stainless steel part is pressed to the end and can be used.

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$21.87

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Leopacat

Leopacat Greenhouse Automatic Vent Opener, Accessories Window Kit with Double Spring Roof Control for Wooden Aluminum Auto Hothouse Opener Agriculture Replacement Cylinder

8.7

ChoiceComparer.com Score

8.7

/ 10

Good

Main highlights

•Wide Temperature Range : The automatic window opener in temperatures ranging from 20°C to 25°C (68°F - 77°F)greenhouse vent is adaptable to all weather conditions. greenhouse supplies high sensitive, automatic respond to weather changes, so you don't need to stay near the greenhouse
•No Batteries Required :Cylinder vent opener non-electric, utilizes solar energy to open or close the greenhouse vents when the temperature rises or falls, and when the temperature rises, a greenhouse greenhouse winder opener cylinder expands and gently pushes the window open. Once the temperature drops, a greenhouse window opener ,automatic greenhouse vent openers automatic smoothly closes the window
•Reliable Helper : This solar heater for greenhouse parts of the greenhouse winder is made from high quality materials to ensure long lasting performance. Auto vent opener can withstand the demands of the greenhouse environment, ensuring that the greenhouse door opens and closes on a regular basis to promote plant growth greenhouse roof vents parts provide more convenience for your grad
•Window Opener Replacement Pieces : Only provides greenhouse opener for your convenience to replace the old greenhouse window solar greenhouse parts,greenhouse winder opener is not included auto vent kit sensitive gardening tools window opener, Time and labor saving, also can supply a better temperature condition of plant's growth
•Easy Installation and Compatibility : Designed for common greenhouse vent openers, this ventilation equipment for greenhouses is easy to replace, easily replacing damaged or deteriorated parts and restoring the original performance of the greenhouse automatic window lifting.Solar heat sensitive agriculture gardening tools, Non electric, Auto hothouse window opener uses solar energy, open or close the greenhouse vents as temperature rises or drops

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$17.39

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Jurtmy

Jurtmy Greenhouse Automatic Window Opener Kit, Greenhouse Accessories Solar Heat Sensitive Automatic Greenhouse Window Opener Replacement, 2 X Hydraulic Cylinder with 3Pcs Microfiber Cleaning Rag

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Material: Greenhouse Automatic Window Opener is made of aluminum spray-painted cylinder, aluminum frame looks more lustrous, and rust-proof, is built to last and withstand harsh weather conditions, would guarantees long-lasting performance.
•Temperature-Sensitive Ventilation: Automatic Window Opener used for greenhouse venting, Auto open and close windows through temperature changes. Operating between 15°C to 25°C (60°F - 77°F), the opener adapts to various weather conditions.
•Energy-Efficient & Eco-Friendly: The greenhouse window opener does not consume batteries or electrical power needed, which is energy-saving and environmentally friendly. Our automatic window opener will automatically open and shut your greenhouse window to maintain the best growing temperature and preventing your greenhouse from overheating, efficiently regulating your greenhouse's internal climate.
•Double Spring Design: Compared with the single spring vent, the double spring greenhouse window opener has stronger thrust force, more solid, and much durable. Lubricate all movable parts with a light oil after fittingeach spring to maintain.(Applypetroleum jelly or grease to the cylinder threadoccasionally)
•Widely Applicable: You will receive 2pcs of automatic greenhouse vent openers with 3pcs cleaning rags, enough quantity to meet your needs and replacements. These greenhouse accessories are practical and useful tools, which can be widely applied for greenhouse windows and greenhouse vents in higher wind situations, maintaining the nice growing temperature and preventing your greenhouse from overheating

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$33.99

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