Price comparison Auto Greenhouse Vent Arm
Vent arm to open vent automatically when temperatures raise. Cleverly engineered specifically to replace the manual vent arm. Opens vent at warm temperatures, closes when temperature cools - perfect for when you are not able to tend to your greenhouse when the weather changes. Frame is made from aluminium with a supporting arm to keep the vent open. To fit the Silverline, Greenline and Multiline range. Does not fit the Snap-n-Grow Greenhouse. Easy to install and supplied with all the fittings.