Vérin de remplacement ouvre-fenêtre automatique pour serres

AUTOMATIC TEMPERATURE CONTROL - No power required; Automatic greenhouse window opener has a built-in highly sensitive wax pen that expands or contracts according to temperature; at 15-77°F, the vent slots open automatically, at 30°C (86°F), they open completely; when the temperature drops, they will close automatically. um die Wärme im Keep inside; works without batteries, cables or solar panels. Spring-loaded construction: high load capacity greenhouse window opening cylinder; Upgraded double spring system provides more thrust force than single spring model; suitable for aluminum, polycarbonate and wood greenhouse frames. PREMIUM STAINLESS MATERIALS - Automatic greenhouse window opener. Long service life due to high quality aluminum alloy and stainless steel; Waterproof, dust and corrosion resistant; Withstands harsh weather conditions outdoors; 8-10 years service life. Universal replacement cylinder: greenhouse window opener Easy installation, standard stroke: maximum opening width 30cm; compatible with most single and double spring greenhouse fans; replaces outdated rods. The ideal choice for greenhouse temperature regulation, the Dribhaus automatic window opener prevents overheating, reduces humidity and prevents mold and fungus infestations, promotes plant growth and ensures optimal growing temperatures for vegetables, fruits, flowers and seedlings.