Air Vent

A temperature-controlled roof vent that opens itself when the greenhouse warms past 62-77 F and closes again as it cools, so your plants never cook while you are away.

Opens automatically between 62 and 77 F (17-25 C), no power or batteries
Opens up to 17 inches for real airflow
Lifts up to 15 lbs, works on any greenhouse size or material
Galvanized finish for years of outdoor use

$95

Choose Option: Manual

Free US shippingQuality guaranteed30-day returns

How it works

A bimetallic strip inside the opener expands as the air warms and contracts as it cools. That movement pushes the vent open and pulls it shut, all day, every day, with nothing to plug in. You can still open and close the vent by hand when you want to.

Why ventilation matters

Keeps daytime temperatures in the range plants actually grow in
Lets humid air out, which cuts mould and fungal disease
Moves fresh air (and CO2) across the leaves for stronger growth

Specifications

Opening range: up to 17 inches
Lift capacity: 15 lbs
Trigger range: 62-77 F (17-25 C)
Material: galvanized steel frame, temperature-driven opener

Shipping

Free shipping in the US. Accessories leave our warehouse in 3-7 business days. Standard delivery takes 12-16 business days; Priority FedEx with tracking 8-12 business days.

Ordering it with a greenhouse? It ships together with the greenhouse, at no extra cost.