Top 10 Cold Frame Automatic Vent Opener – Greenhouse Window Openers

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1. Ketofa

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Lifts 7kg/15lb Double Spring, Ketofa Automatic Vent Opener for Greenhouse&Cold Frame,Window Opener,Automatic Roof Vent Opener,Auto Solar Heat Sensitive Greenhouse Vent Opener with Cylinder

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Ketofa #ad - Clockwise for higher, counter-clockwise for lower. Automatic adjustment: tsolar heat sensitive vent opener, automatic stretch or shrink the vent while the temperature is changing. Maximum opening at about 30℃/86℉depending on adjustment and load.

Easy to install: equipped with screws, can be installed directly with clampsnot includedor screws onto your greenhouse frame, very simple and convenient. Non original aftermarket part. Multi-functiongreat for variety of occasions, botanical garden, railway and greenhouse. The window opener is made of high-quality steel, which is strong and sturdy, home, farm, office, and the solar sensor is also very durable.

Auto-opening temperature range is adjustable from 15-25℃60-77℉ by turning the cylinder. Universal vent opener: applicable to most windows, Vents weighting up to 7kg/15lb. Heat sensitive: the window opener automatically opens and closes through the thermal induction of the temperature, maintains the best growing temperature.
BrandKetofa #ad
ManufacturerKetofa #ad
Height1.73 Inches
Length14.76 Inches
Width3.74 Inches

2. TMISHION

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Solar Energy Automatic Ventilation Openers greenhouse vent automatic for Hothouse Cold Frame Gardening Tools, Lifts 15 Lbs, No power Needed, Aluminum Alloy Auto Vent Greenhouse Window Opener

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TMISHION #ad - Both clamp and screws included, easy installation. Maximum opening about: 30°. Easy to fit: you can easy fit it onto your Greenhouse vent or window using supplied screws and clamps or your own fasteners into pre-punched holes.

Solar energy - no power needed: Best for awning style windows. Automatic window opener: it can according growing temperature to adjust window opening and prevents your greenhouse from overheating. It cost nothing to operate, environment friendly. Product parameter: maximum window opening: 45cm, adjustable open temperature range: 20 - 25 ° C 68 - 77 ° F, depending on adjustment and load Maximum opening weight: 7kg/15lb, Size: 15.0x3. 7x2. 0 inch. Important notice: do not use this opener anywhere the temperature will exceed 50° 122F, And please ensure your greenhouse window can be opened freely by at least 45cm 18"".
BrandTMISHION #ad
ManufacturerTMISHION #ad
Part NumberTMISHIONJY05930

3. BIBISTORE

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BIBISTORE Auto Greenhouse Vent Opener Automatic Solar Cold Frame Window Openers Agriculture Hothouse Roof Opening Kits Gardening Temperature Controlled Tools-33 Lbs Lift Capacity,Two Springs

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BIBISTORE #ad - Non electric-use solar energy only, no batteries or electricity required. Economic and Eco-friendly. Complete automatic-this vent opener will automatically open and close your greenhouse window while the environment temperature changes, which will help you maintain the best growing temperature and prevents your greenhouse from overheating.

Easy to install- fit for most of aluminum&wooden frame greenhouse. Comes with a fitting accessory pack and a detailed manual for easy installation. High quality&durable-made of high quality of galvanized steel. Durable and strong for long time use. Two springs&high lift capability-lifts vent weight up to 33 lbs 15 kg, covers most of greenhouse windows. If you it is still not enough for your window, you could use two window openers together.
BrandBIBISTORE #ad
ManufacturerBIBISTORE #ad

4. TOPINCN

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TOPINCN Greenhouse Window Opener Automatically Prevent Overheating Vent Autovent Solar Heat Energy Sensitive Automatic Greenhouses Roof

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TOPINCN #ad - Ideal for your greenhouse window: Opens and closes your greenhouse window. Uses solar energy: non electric, uses solar energy, open or close the greenhouse vents as temperature rises or drops. Prevent overheating: Prevent greenhouse overheating. Changes automatically: As the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating. Can be used onto greenhouse frame: Can be clamped onto or screwed onto your greenhouse frame.
BrandTOPINCN #ad
ManufacturerTOPINCN #ad
Height0.39 Inches
Length0.39 Inches
Weight0.82 Pounds
Width0.39 Inches
Part NumberTOPINCN64oa3bunrs

5. TMISHION

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No power Needed, Lifts 15 Lbs, Auto Vent Greenhouse Window Opener, Solar Energy Automatic Ventilation Openers for Hothouse greenhouse vent automatic Cold Frame Gardening Tools

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TMISHION #ad - Solar energy - no power needed: Best for awning style windows. Both clamp and screws included, easy installation. Easy to fit: you can easy fit it onto your Greenhouse vent or window using supplied screws and clamps or your own fasteners into pre-punched holes.

Maximum opening about: 30°. It cost nothing to operate, environment friendly. Automatic window opener: it can according growing temperature to adjust window opening and prevents your greenhouse from overheating. Important notice: do not use this opener anywhere the temperature will exceed 50° 122F, And please ensure your greenhouse window can be opened freely by at least 45cm 18"". Product parameter: maximum window opening: 45cm, adjustable open temperature range: 15°- 25°/60°-77F, depending on adjustment and load Maximum opening weight: 7kg/15lb, Size: 14.96 x 3. 74 x 3. 74 inch.
BrandTMISHION #ad
ManufacturerTMISHION #ad
Part NumberTMISHIONJY05908

6. Agriculture Solutions

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Agriculture Solutions Univent Automatic Vent Opener Standard, Lifts 15 Lbs

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Agriculture Solutions #ad - Solar vent opener can lift up to 15 lbs. Starts opening between 55 - 75°F, depending on how you have adjusted the vent. Screw directly into polycarbonate panels, wood, or metal frames.
BrandAgriculture Solutions #ad
ManufacturerAgriculture Solutions LLC #ad
Height1.97 Inches
Length11.81 Inches
Weight0.88 Pounds
Width1.97 Inches
Part Number441665
ModelUnivent

7. briidea

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Briidea Automatic Greenhouse Window Opener, Lifts 30LBs, Auto Vent Openers Cylinder with 2 Springs Solar Cold Frame Gardening Tool

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briidea #ad - It is an ideal choice for greenhouse windows, wall and hobby vents in a windy environment. Great trouble-free dual spring design is more robust and of higher wind resistance. The greenhouse window vent opener starts opening between 59 - 77°F adjustable.

Replace manual vent arm and save you great effort. High quality: galvanized sheet and aluminum material for durability and corrosion-resistant. Application: suitable for all greenhouse windows and vents-- polycarbonate panels, wood, or metal frames. Easy installation: this auto vent opener is easy to install onto your greenhouse vent or window using supplied screws and clamps. Just put this automatic greenhouse window opener on and forget about it, making it easier to grow a garden.

Best for awning style windows. Product features: uses solar energy only, no power and battery required. The maximum height of the open window is about 18in. Auto ventilation: this greenhouse window opener will automatically open and close your greenhouse windows according to temperature changes so as to keep your greenhouse ventilated, avoid overheating, and maintain the optimal growth temperature.
Brandbriidea #ad
Manufacturerbriidea #ad
Height1.97 Inches
Length14.96 Inches
Width3.74 Inches

8. GLOGLOW

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15 Lbs 30° 17.7Inch Lift, GLOGLOW Greenhouse Automatic Vent Opener, Solar Heat Sensitive Adjustable Temperature Sensor Window Roof Vent

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GLOGLOW #ad - Automatically: the window opener changes automatically follow the temperature, which can maintains the best growing temperature and prevents your greenhouse from overheating.

Solar energy: the window opener is non electric, it uses solar energy to open or close the greenhouse vents as temperature rises or drops. Maximum window opening: 45cm, depending on adjustment and load, Maximum opening about: 30°, Maximum opening weight: 7kg/15lb, Adjustable open temperature range: 20°- 25°/68°-77F. Greenhouse window opener: the window opener is suitable for many greenhouses, it can be can be open and close greenhouse window, good ideal for yours. Aluminum alloy materials: the window opener is made of premium aluminum alloy materials, which can be clamped onto or screwed onto your greenhouse frame.
BrandGLOGLOW #ad
ManufacturerGLOGLOW #ad
Height0.39 Inches
Length0.39 Inches
Width0.39 Inches
Part NumberGLOGLOW743gh2d1k5

9. BIBISTORE

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BIBISTORE Automatic Vent Opener Auto Greenhouse Window Openers Solar Powered Cold Frame Roof Vent Kit Wooden Hothouse Vent Auto Opening Tool Gardening Supplies-Lifts 15.4 Lbs7kg Double Spring

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BIBISTORE #ad - Double spring-double spring type, resist wind twist. Stronger force, suitable for windy mountain area, lifts up to 15. 4 lbs7kg.

No electric power needed&automatic-solar powered, automatically open or close the greenhouse vents as temperature rises or drops. Easy installation-comes with a fitting accessory pack and a detailed manual for easy installation. High quality materials-made of high quality of aluminum and stainless steel. Durable and no rust. Overheating protection-this automatic window opener will help you maintaining the best growing temperature and prevent your greenhouse from overheating.
BrandBIBISTORE #ad
ManufacturerBIBISTORE #ad

10. Ycsst

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Univent Automatic Vent Opener Standard Automatic Roof Vent Opener Solar Heat Sensitive Greenhouse Autovent Vent Opener Standard-Lifts 15LBs for Hothouse Cold Frame Gardening Tools No Power Needed.

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Ycsst #ad - 2. The maximum height of the open window is about 45 cm 18 inches. 3. Uses solar energy only, no power required. 4. Stainless steel galvanized sheet, double spring design, automatic temperature adjustment 15-25°. 1. The maximum load-bearing capacity of the glass of the ventilation window does not exceed 15lb. 5. Note: do not apply excessive loads by locking or covering window. The automatic ventilation window opener in the greenhouse cannot be used in an environment with a temperature higher than 50°.
BrandYcsst #ad
ManufacturerYcsst #ad
Height1.57 Inches
Length12.4 Inches
Weight1.23 Pounds
Width1.38 Inches