Collecting listings has surprises
Description If the temperature Lower again (the cylinder cools down), the spring pushes the air rod back into the cylinder (the window closes).
Working principle of greenhouse vent automatic opener: If the temperature of the greenhouse rises, the gas in the gas field will become hot, and the will push it out due to the increase in pressure.
. (window opens)
Features
-Color:Black
-Material:Stainless steel
- Size: 32.00X1.50X1.50cm/12.58X0.59X0.59in
-Automatically to maintain the optimal growth temperature and prevent the greenhouse from overheating.
-Durable and rust-proof in humid environments, with long service life.
-Easy to install, convenient and practical.