Automatic Greenhouse Window Vent Opener Single Spring Solar Auto Heat Kit Window Opener for Greenhouse

Ideal for your greenhouse window--opens and closes your greenhouse window as the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating.

Non Electric, uses solar energy, open or close the greenhouse vents as temperature rises or drops

Including fittings & installation manual

Can be clamped onto or screwed onto your greenhouse frame

Important notice:Do not use this opener anywhere the temperature will exceed 50° (122F)

Please ensure your greenhouse window can be opened freely by at least 45cm (18")

Do not apply excessive loads by locking or covering window

Do not dismantle the cylinder

The opener CANNOT stop by manual

Item Specifications

Maximum window opening: 45cm
Maximum opening: about 30°, depending on adjustment and load
Maximum opening weight: 7kg/15lb
Adjustable open temperature range: 15°- 25°/60°-77F