Automatic Greenhouse Window Opener Kit - Adjustable Vent Opener for Greenhouses, Garden Accessories, DIY Home Greenhouse Ventilation (Ideal for Small to Medium Greenhouses, Balcony Gardens & Indoor Plant Growth)

Can be clamped onto or screwed onto your greenhouse frame

Perfect 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

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

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