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Evergreen Greenhouse Automatic Vent Opener

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Evergreen Greenhouse / Glasshouse Auto-Opening Vent.

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Product overview

Evergreen Greenhouse / Glasshouse Auto-Opening Vent.

Top quality product backed by our 12 month warranty. Thermostat mechanism, automatically opens and closes the vent at a set temperature.

Its automatic operation adjusts the ventilation as temperature changes, allowing for optimal air flow in your greenhouse. No more worrying about your flowers and plants, even when you're away.

There's no need for troublesome cables or regular battery replacements.

- Starts to open at 18-25°C
- Fully open at 35°C and above
- Maximum extension of 45cm
- Maximum open weight 7kg

Similar models from other suppliers come in at $130+

Weight: 1kg
Packed carton size: 8.5cm x 5cm x 28.5cm

Average thickness of aluminium profiles: at least 1.5mm


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0800 800 880

Questions and answers

12 votes
What powers the automatic vent opener?
It acts like a thermostat, the piston contains a mineral wax that expands when heated, opening the window. As the temperature drops this contracts and, with the help of the spring, closes the window.
By Trade Tested on April 01 2019
0 votes
Can we use this for a vertical window instead of a horizontal one?
Yes, this would work with a vertical window too.
By Trade Tested on April 05 2022
0 votes
Will auto opener work on tunnel house with push up roof vent
It will work on most green houses.
By Trade Tested on July 19 2021
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All reviews (67)

Read reviews that mention

  • opener work
Works well

Nicely finished compact product that is performing very well and looks very tidy.

Nick Dunedin
Very clever device

The opener works well, is easy to install, and operated as described.

A L Whanganui
Evergreen auto opener

A kitty tricky to follow instructions and several adjustments mode to greenhouse frame otherwise good

Kirk spragg 27 Murphy lane Taupiri
Evergreen Greenhouse Automatic Vent Opener

Thanks this works better than expected

Bronie Blenheim
Automatic Vent Opener is great

Love this product, I keep forgetting to take the piston out in winter so I end up having to replace it for summer.

Becks Bay of Plenty