Multi Line Greenhouse Automatic Vent

This automatic vent opener for the  Multi Line Greenhouse will automatically open and close the vent when temperatures changes to help keep your greenhouse at the optimum temperature. Ingenious design enables the vent to be controlled by the temperature. When it goes into the 70's the arm heats up which causes it to open, thus pushing open the window. Also, the opener will close again when the temperature cools.

Free shipping when purchased with the Multi Line Greenhouse