Auto Open/Closed.The greenhouse window opener does not consume any power, no batteries or electrical power needed
Ideal for your greenhouse window, wall and hobby vents in higher wind situations. Suitable for Harmony, Hybrid, Mythos, Octave, Balance, Essence, Americana, Victory, Glory, Bella & Lean To Grow House 8x4 Silver Line, Inter Line, Multi Line Greenhouses with pre-assembled Roof Vent
Starts opening between 59 - 77°F, Replaces manual vent arm
Screw directly into polycarbonate panels, wood, or metal frames.
