The roof vents work using a thermal expansion mechanism. This means you don't need any electricity.
You can set your tolerable heat level and then leave it alone to work its magic.
Lift mechanism is attached to galvanized steel lid which is attached to the greenhouse using a hinge.
RETURN & REFUND POLICY
We do not accept returns or offer refunds for self-opening vents.
There is no charge for installation of extra vents at time of ordering MyOwnGreenhouse.
Vents ordered for existing MyOwnGreenhouse will be installed at your site at an extra charge, to be determined by location and accessibility to site.