Call Us 0800 800 880

Evergreen Greenhouse Automatic Vent Opener

In Stock
or 4 payments of $17.25 on
Price GuaranteeSeen a lower price?Ask us to beat it

Evergreen Greenhouse / Glasshouse Auto-Opening Vent.

Read more
Shipping options to
Please select one
Quantity: 1
13 people have this in their cart
Add to Wishlist

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


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

11 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
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
1 vote
Will this work on the louver windows style the one that has 4 or so blades of glass?
Yes most likely.
By Trade Tested on February 02 2021
See more questions and answers (7)

Overall rating

  • 5 star
  • 4 star
  • 3 star
  • 2 star
  • 1 star
All reviews (57)

Read reviews that mention

Great Product

I must admit I was somewhat sceptical when I ordered this product. The openers however have proved me wrong. They work great. The only challenge I had was working out the correct way to install the openers, but once installed I've had no problems. The openers on the sunny side of the greenhouse open further than the other side, because presumably the wax is heating to a higher temperature. It is great to be able to go away on holiday knowing the vegetables in the greenhouse will not be fried. I'm looking forward to finding out the life expectancy of these openers.

Grant Otago
Automatic vent

Good feature plans need a better explanation as we had to use youtube to be able to fit them

Wowib Canterbury
Effective but installation not ideal

Very effective and low maintenance once it's installed. Instruction booklet is harder to decipher than the entire booklet for the greenhouse itself. That being said it's entirely worth it, just a little hassle to get installed.

Clare Masterton, NZ
Greenhouse automatic vent opener

We were amazed how well this product worked. It totally exceeded our expectations.

Beau Auckland

great product works perfectly

bob clarke Auckland