Automatic Greenhouse Window Opener Kit - Solar Powered Vent Opener for Greenhouses, Non-Electric Greenhouse Accessories | Perfect for Garden Ventilation, Plant Growth & Temperature Control

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

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

As the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating

Can be clamped onto or screwed onto your greenhouse frame

Perfect for your greenhouse window‑‑opens and closes your greenhouse window