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Palram Greenhouse Automatic Vent Opener

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This automatic roof vent opener is designed to automatically control the temperature and moisture level in all Palram Canopia greenhouses.

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Product overview

This automatic roof vent opener is designed to automatically control the temperature and moisture level in all Palram Canopia greenhouses.

When the air inside your greenhouse warms, this vent will gradually open to allow the correct amount of airflow into the greenhouse, and will close when the optimal temperature is reached.

The vent arm was designed with a metal cylinder containing wax which expands when heated to push a piston, which raises the window, as the air gets warmer, then contracts as it cools, closing with the use of a spring and resetting the piston. All you need to do is to install it on your roof vent window and it automatically starts working.

The Automatic Vent Opener operates without the use of electricity and is compatible with all Palram Canopia greenhouses including our Mythos range.

Great for busy gardeners, this auto vent opener takes the hassle out of maintaining your greenhouse.

• Opens roof vent window automatically around 68°F for air circulation, closes when the temperature cools
• Automatically control the temperature and moisture level
• Durable metal design with natural wax
• Smart-lock connectors make installation quick and easy
• Works with Palram Canopia’s Mythos Greenhouses
• Great for busy gardeners

Start opening point: 12-15°C (53.6-59°F)
Length: 30cm
Max vent opening: 30cm
Max weight lifted: 6kg
Suitable for windows up to: 60cm
Weight: 0.39kg
Material: Cast aluminium
Requires a Philips head screwdriver

Carton size: W 40cm x D 7cm x H 5cm
Carton weight: 0.44kg

Palram Canopia

Can we help?

Our friendly and knowledgeable gurus are trained to answer all your questions as quickly as possible. So if there’s anything you need to know just give us a call during business hours, or send us an email any time.

0800 800 880

Questions and answers

0 votes
Will this work on a wintergardenz greenhouse?
We have not tested this
By Trade Tested on February 26 2024
0 votes
Will this work on a standard greenhouse vent? Thanks.
Yes it will
By Trade Tested on October 03 2022
0 votes
Are these ok to get wet?
Yes they are.
By Trade Tested on August 15 2022

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All reviews (15)

Read reviews that mention

Fantastic product.

It was a must for the new greenhouse as it takes all worry of ventilation away. It is my second one.

Bruce Northland

Had to adapt fittings slightly to install in my particular greenhouse but very pleased with the result. Openers work perfectly - start opening the roof windows (4) at 17.5 c and close as temperature drops.

Chris Manawatu
Auto vent opener.

Brought this opener for our glass house, had my doughts about its operation, but it perfect, easy to fit, opens and closes , keeping glass house at the optimum temperature. Its like magic. Would highly recommend to anyone with glass house.

Mells Canterbury
Supports disabling the unit in high wind

I bought this instead of the evergreen specific one as this unit has the a pin you can pull out to quickly disable it during high wind. It wasn't hard to make it work on my Evergreen green house. Well worth the extra Money

Drew Canterbury

This is a great product and it works so well. No need to worry about opening and closing the vent. Highly recommended

Bruce G Northland
Window opener

Great product works perfectly

G Bop
Automatic vent opener for greenhouse

Works really well, I am very pleased with it.

Phil Thames
Palram Greenhouse Automatic Vent Opener

Works well and easily modified to fit another greenhouse type

David Waikato
Good buy

The instructions are terrible and I'm not sure if I did it right but it opens and closes so I'm happy.

Ollie Canterbury
Palram Greenhouse Automatic Vent Opener

The Palram Greenhouse Automatic Vent Opener has changed my life, no more guessing when I should open or close the vent or having to go over to the greenhouse to do so, I’m thrilled with it Thankyou.

Cherries Hawke's Bay