Easy Grow  & Nature's Greenhouse Automatic Vent Opener Control Air Flow with Ease.  Ships Free 

• Automatic Vent Openers Puts Ventilation Control at your Finger Tips. 
• No Step Stool Needed
• Easiest Way to Control Greenhouse Air Flow
• Greenhouse Auto Vent Opener Ships Free to 48 contiguous United States.  For rates outside the contiguous US, please contact us prior to purchase 

Greenhouse Auto Vent Opener Features:

• The universal auto opener allows control of top mounted roof vents. 
• Will respond to temperatures of 60° F to 75° F and an 18" maximum opening which would be reached at approximately 90° F.
• Auto Vent Opener will lift vents weighing up to 15 lbs.
• Made from corrosion resistant materials including aluminum and stainless steel.
• This model is recommended for use with Juliana, EasyGrow, Natures & other greenhouses with vents.
• Ships Free to 48 contiguous United States.  Please contact us prior to purchaing for rates to other destinations