Quality built anodised aluminium automatic window opener for greenhouses.
This opener will automatically open and close your greenhouse window, as the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating.
Start to open - 15°c - 25°c (60°-77F); Fully open temperature 35° (19f) or above; Fully open distance 45cm (18")
Non Electric, uses solar energy, open or close the greenhouse vents as temperature rises or drops
Window roof vent opener is Easy to fit - Screws into wood and clamps onto aluminium greenhouses without the need for drilling, Can be clamped onto or screwed onto your greenhouse frame, including fittings & installation manual.