Automatic Vent Opener

Heat-Sensing Greenhouse Vent Opener Works Without Electricity

This device opens and closes your greenhouse vent panels for reliable climate control even when you’re away! No electrical power is required. Fluid-filled cylinders expand in warm temperatures. You can raise or lower the temperature setting with a simple twist of the cylinder.

Product Details

• Steel with paraffin in the vent opener cylinder
• Rated to lift up to 15 lbs.
• Depending upon installation, this vent opener will open a vent 12-18"
• The opening temperature can be adjusted from approx. 65° to 80° F
• 12" L; weighs 1/2 lb.

• Sorry, no shipments to AA,AE,AF,AK,AP,GU,HI,PR,VI