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Want to make your day to day life with a Tunnel House easier? Well this is the add on you must purchase. 

Automatically opening and closing at certain temperatures, our Auto Vent openers are a great way to control temperature in your glasshouse without the need for electricity.

Automatic vent openers open up when temperatures reach a minimum of between 17 and 24 Degrees Celsius (the range is adjustable) using a temperature-sensitive wax mechanism. They stay open until the temperature cools down to below that 17-24 degree range. 

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

Suitable for our Urban Backyard glasshouses (not Tunnel Houses). Lifts up to 14kg.

Please Note:  When installing these auto vent openers, it is easiest if you remove the roof vent panel, affix the auto vent opener to the panel, then hook the roof vent panel back into the roof ridge and attach the auto vent opener to the L603-0585 (frame piece below the roof vent panel).  The roof vent can be removed by opening the hinge piece (L615-0612) wide enough until it unhooks from the roof ridge.  Then put it back in the same way.

Its best to add on this product at the time of ordering your Glasshouse, but if your ordering afterwards please contact us directly for your small item shipping charges on

We get it. Youve got alot of choice when it comes to online local suppliers & retailers. Heres why we think you should shop with Urban Backyards. 

- We have brought some of the best suppliers NZ has to offer together for you to get the best products for your Urban Backyard. 

- Easy, trusted flat rate shipping to make its less stressful for you.

- Price Match Gaurantee. We offer the best price online, gaurenteed. 

- 30 Day Easy Returns. No happy with your product, we'll take it back, no questions asked. 

- Great, local service. We pride ourselves on the best service, anywhere.

Shipping within our beautiful country of Aotearoa New Zealand is a simple flat rate of $249. 

We trust Mainfreight for our shipping and as our items are often very heavy, depending on the item you will be required to uplift your item from your nearest Mainfreight depot with a car & trailer.

If you'd like shipping direct to your door then please get in touch using our online contact form and we can get that shipping price to you asap.


Our returns are easy so you can shop with confidence. 

If your item is not what your wanting then get in touch with us within 7 days of receiving the item, please include photos if faulty, and we will be in touch with returning your order and refunds. No questions asked. 

Safe, Easy and Trusted for your peace of mind. 

Are you wanting a bigger size? Different door configuration? A few additional products that you not sure how they will all work together?

Get in touch with us now using the Contact Us page or flick us an email on and include your phone number so we can email or call you back and provide you with all the information you need straight away - no obligation. 

We pride ourselves on serving you and ensuring you get the best for your Urban Backyard.