?Wide Use?Ideal for your greenhouse window--opens and closes your greenhouse window.
?Prevent Overheating?Prevent greenhouse overheating.
?Prevents Greenhouse Overheating?As the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating.
?Non Electric?Non electric, uses solar energy, open or close the greenhouse vents as temperature rises or drops.
?Screwed Green House?Can be clamped onto or screwed onto your greenhouse frame.