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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

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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Customer reviews

Customer reviews

Overall rating

4.8 out of 5 stars from 24 reviews
Mat Otago

Greenhouse window opener

10 days ago

2018-11-28 19:48:12

Great product, works perfectly. I bought 4 to use in my custom built glasshouse. I had to make a custom bracket to hold the opener, easy though, and works a treat

Keith W Bay of Plenty

Evergreen Greenhouse Automatic Vent Opener

18 days ago

2018-11-21 02:59:10

Won at ( Trademe ) auction for a good price, totally stoked with the installed product A+++

Vic Northland

Auto vent opener

4 months ago

2018-08-02 09:49:00

Working well.

Pat Taranaki

Automatic Vent Opener

7 months ago

2018-05-17 00:16:11

The instructions were a bit confusing but after fitting it as I felt it should be, the opener works superbly. Reccomended

Steve Otago

Automatic vent opener

8 months ago

2018-04-11 08:39:49

Good product but smell way to override with conventional handle would be good.

Rick Auckland

Great Product works well

9 months ago

2018-03-27 22:13:43

Great product, works very well.

Bob Waihi

Excellent product

about 1 year ago

2017-12-06 20:12:12

works exactly as I hoped. Fully closed at 20 degrees C and fully open over 30. A little bit fiddly to install. Don't use a high speed drill to drill out the rivets. A slower speed battery drill with a 4mm bit is much better. Use rivets to fit the adjustor to the window rather than the self tappers supplied as they are too long. The other end is easy just using the two captive bolts from the manual system. Adjustor screws in or out to adjust but I did have to screw in to the limit. Check at various temperatures and don't forget to remove the cotter pin.

Russell Otago

Greenhouse Vent Opener

about 1 year ago

2017-12-06 02:15:50

Great!!! A bit fiddly to install but so worth it. Wish we'd added them when we bought the greenhouse a few years back.

Peter Wellington

Auto window opener

about 1 year ago

2017-11-22 00:16:35

Cleaver little item that works well

Al southland

glasshouse automatic vent

about 1 year ago

2017-11-17 01:07:11

great product.

Thommo Renwick

auto vent openers

about 1 year ago

2017-11-04 19:28:23

the auto vent openers are great just fit them and walk away.

Bully Otago

excellent product

about 1 year ago

2017-11-03 23:18:42

This auto opener is sturdy and easy to install. Good value and a game changer for the green house.

Roly Hawkes Bay

Save your plants

about 1 year ago

2017-10-30 02:53:38

A great device, well worth the cost. Relatively simple to install. You never forget to open your vents again.

Elle Wellington

Well worth it!

about 1 year ago

2017-09-27 05:30:06

A simple and very easy to install device that works fantastically. Really nice to buy something that performs just as advertised.

Mama G Christchurch

Evergreen Greenhouse Auto vent opener

about 1 year ago

2017-06-13 03:17:19

Great product, highly recommend.

JonPierre Rangiora

Evergreen Greenhouse Automatic Vent Opener

about 1 year ago

2017-05-10 21:42:09

Working really well, saves having to remember to open and close. Would definitely recommend to a friend.

Mitch Christchurch

Does a great job!

over 2 years ago

2016-11-12 02:56:27

Fitted and working, no problems.

Chas Canterbury

Works great

over 2 years ago

2016-11-10 09:18:42

I would definitely buy one again

Paul Otago

Trouble free

over 2 years ago

2016-11-09 08:15:33

These are a great addition to my hot house, trouble free and reliable

Bill Wellington

inituitive design

over 2 years ago

2016-03-08 01:50:04

Excellent product that worked well on my new greenhouse.

AJ Canterbury

Must Have!

over 2 years ago

2016-03-05 00:20:08

These are simply the best you really need one for each window.

Farmer Otago

Work really well

over 3 years ago

2015-11-17 02:31:31

Had two operating for the last two seasons that was my reason for three more 

Wes Gisborne


over 3 years ago

2015-10-14 18:38:27

Installed auto vent when I built the greenhouse. The unit did not fit right out of the box I had to make some bits to mount it so it can close properly, but once on it works very well, well worth it

Mobychev Auckland

Simple and brilliant

over 3 years ago

2015-10-09 02:04:04

Best investment i have made, saves burning a lot of plants.Very reliable too.

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