Greenhouse Window Opening Systems

Automate your greenhouse ventilation completely grid-free with the premium Bayliss Autovent Opener. This non-electric, solar-activated roof vent opener utilizes advanced thermal wax expansion technology to smoothly lift greenhouse vents up to 12 inches. Featuring an adjustable opening point starting around 55°F, a heavy-duty stainless steel piston, and a 6.5 lb closing spring, it delivers reliable, automated climate control without any wiring or electricity.