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AV01 Residential Roof vent, suitable for a backyard greenhouse. Lifts up to 14kg.

Automatically openening and closing at certain temperatures, vent openers are a great way to control temperature in a greenhouse without the need for electricity. Each of our different vent openers open up when temperatures reach a minimum of between 17 and 24 degrees celcius (the range is adustable) using a temperature-sensitve wax mechanism. They stay open until the temperature cools down to below that 17-24 degree range. Depending on the window load that the vent is opening, our size range has you covered from the smallest residential roof vent opener, to side louvre openers, to large commercial roof vent openers that can withstand strong winds.

These vent openers are the perfect hassle-free, non-electric solution to temperature regulation and airflow for your greenhouse.

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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