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Automatic Vent Opener image
 
(based on 5 ratings)
Located in: Gardening, Greenhouses, Accessories
This device opens and closes your greenhouse vent panels for reliable climate control even when you’re away! No electrical power is required. Fluid-filled cylinders expand in warm temperatures. You can raise or lower the temperature setting with a simple twist of the cylinder.
Review Snapshot®
Avg. Customer Rating:
 
4.4 stars
(based on 5 reviews)
100% of respondents would recommend this to a friend.

Customers most agreed on the following attributes:

Pros:
Extends season(4), Solid construction(4)
Describe Yourself:
Do-it-yourself(3)
 
Exactly what I needed
By Andy the EggmanVerified Purchaser from Bfranford, CT on 5/16/2011
Pros:
Extends Season, Solid Construction
Describe Yourself:
Do-It-Yourself
Bottom Line:
Yes, I would recommend this to a friend

Comments about Automatic Vent Opener:

I bought a greenhouse from GS ten years ago and have needed replacement window openers for several years. This is a perfect replacement. I now just need to buy the thermo-piston parts for my other windows.

 
Great, but read the SMALL print!
By Sally from Ellensburg, Wa on 4/28/2011
Pros:
It works, Mindless temp regulation, Solid Construction
Cons:
Cylinder ruined by freeze
Best Uses:
Chicken coops, Greenhouse windows
Describe Yourself:
Do-It-Yourself
Bottom Line:
Yes, I would recommend this to a friend

Comments about Automatic Vent Opener:

The cylinder must be removed in areas with cold winters, or it becomes inoperable. Unfortunately I neglected to do this, all the cylinders failed, and now I'm looking to replace them. Otherwise these are very handy on the greenhouse to regulate the temp without having to be around.

 
wow, it really works
By little girlVerified Reviewer from Indpls., IN on 3/24/2010
Pros:
Extends Season, Solid Construction, Weather Resistant
Best Uses:
Protect Garden
Describe Yourself:
Do-It-Yourself
Bottom Line:
Yes, I would recommend this to a friend

Comments about Automatic Vent Opener:

I couldn't believe that it really works. I don't know how it actually opens the lid of the cold frame but it does. The lid is a little heavy also, so I was really surprised.It's easy to use and set up.

[2 of 2 customers found this review helpful]

 
Great item
By Bob J.Verified Purchaser from Rochester, NY on 4/13/2009
Pros:
Extends Season, Weather Resistant
Describe Yourself:
Handyman
Bottom Line:
Yes, I would recommend this to a friend

Comments about Automatic Vent Opener:

We use the lifter on a home made cold frame and it works great.

[3 of 3 customers found this review helpful]

 
Amazing!
By Silver FoxVerified Purchaser from Springfield, Missouri on 11/8/2008
Pros:
Extends Season, Solid Construction
Describe Yourself:
Novice
Bottom Line:
Yes, I would recommend this to a friend

Comments about Automatic Vent Opener:

I don't understand how it works, but IT WORKS!!
I'm new to hobby greenhousing but the automatic vent opener gives me a good sense of security that I won't cook my plants.

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