Model # 701338

Internet #202075434

Palram 2-3/4 in. x 15-3/4 in. Automatic Vent Opener


2-3/4 in. x 15-3/4 in. Automatic Vent Opener

$52.42 /each

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Product Overview

The Automatic Vent Opener was designed to automatically control the temperature, humidity and provide additional ventilation when needed, making gardening easier. As the air inside the greenhouse warms, the vent gradually opens to allow the correct amount of air flow into the greenhouse and closes 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 works with all our Greenhouse models only.

  • Assembled dimension: 15.75 in. W x 2.75 in. D x 2 in. H
  • Opens roof vent automatically as temperature warms for air circulation and heat relief, Closes when temperature cools
  • Solar powered, heat activated - start opening point: 54-59 F degrees
  • Mechanic system - no electricity is needed
  • Suitable for all Palram greenhouses and easy to install




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Customer Questions & Answers

1 Question2 Answers

Customer Questions & Answers

2-3/4 in. x 15-3/4 in. Automatic Vent Opener
2-3/4 in. x 15-3/4 in. Automatic Vent Opener

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2 answers

how is vent opener installed

This question is from 2-3/4 in. x 15-3/4 in. Automatic Vent Opener
Asked by
carmel n.y.
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February 8, 2016
How would I install vent. before motors opened vents. Would one vent open vent 12 ft long?
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Answers (2)

Asked by
Aurora Or.
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September 20, 2016
It's designed to open one vent on the greenhouse, 24". I don't think it will open 12ft of vent.
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February 10, 2016
Hi slips,
The Automatic Vent Opener is compatible with Palram & Rion greenhouses only.
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Customer Reviews

Rated 4.6 out of 5 by 18 reviewers.
Rated 5.0 out of 5.0 by Works as advertised! Installed easily and works just as advertised! May buy another for my other vent. September 20, 2016
Rated 3.0 out of 5.0 by The instructions are lacking detail I made a custom bracket to mount two of these in a Greenhouse from Harbor Freight. I could not find a photo of one of these mounted with the vent closed. The two I purchase worked per the instructions, but with the units at the halfway point on the adjustment and at 60 degrees the ends that are mounted to the frame and the vent are about 8 inches apart. I was not able to mount them without making the bracket. See the photo attached. Pay attention to the initial preparation where the unit is placed in the fridge for a while. This allows the rod to free up from its initial stuck postion. May 20, 2015
Rated 4.0 out of 5.0 by does the job Hard to assemble.instruction not very clear,however works well April 26, 2016
Rated 5.0 out of 5.0 by Just what I wanted! Wanted a hobby greenhouse to keep the rodents from eating all my veggies. If you take the time to sort all the parts so you can find them before you begin, the greenhouse goes up quite easily, although it takes a good 8 hours with 2 people for this particular kit. It is very substantial when together and I just love it. Stays quite warm inside even on chilly nights. The shed is great for all my tools. Couldn't be happier. May 7, 2014
Rated 5.0 out of 5.0 by Simple but effective The Palram automatic vent opener is very simple and borders on genius. I am very impressed with the engineering and design of Palram products and this is no exception. Installation is fairly simple but requires some mechanical skill. December 29, 2015
Rated 5.0 out of 5.0 by makes life easy and saves your plants Pretty straightforward installation and it comes with parts to fit most Palram greenhouses (I think there's only one model it doesn't fit). Although opening and closing the roof vent is easy, remembering to do it is hard. Lost a lot of good plants last year just because they were cooked in a closed greenhouse. Now I don't have to worry about when to open and close the vent, and it has made things so much easier - not to mention that the plants are a lot happier now. June 8, 2015
Rated 5.0 out of 5.0 by What a time saver! We purchased 2 of these hinges for our new greenhouse. Installing them was easy, and when put in place, they actually open up on their own. Amazing invention. This will save us some headaches, as we won't have to worry about our roof vents in the greenhouse not getting opened. I am happy we purchased this item, even though I thought they were a bit expensive. But if this invention saves my plants from burning up, then it was worth every penny we spent on them. July 28, 2014
Rated 5.0 out of 5.0 by Works great Easy to install and works great. One thing I have just noticed is that if you put a heater in the greenhouse the vent arm will open if it gets above 65 inside. We'll see if 30 degrees outside what happens. So it is really responsive to temperatures. November 11, 2014
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