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Gigavent Auto Vent Opener
Bayliss MK7 Triple Spring Auto Vent Opener
Price: $65 - $70
Grow More Univent Automatic Vent Opener
Univent Replacement Power Tube
The Univent allows solar powered control of top and side mounted window vents thanks to its dual springs. Univent window openers have an adjustable opening temperature of 60° F to 75° F and an 18" maximum opening which would be reached at approximately 20° to 30°F above opening temperature. Univent openers are made from corrosion resistant materials including aluminum and stainless steel. Univents also feature a unique quick disconnect feature on the bottom of the unit which is useful when using the opener with a cold frame. This model is recommended for use with Grow More, Solar Harvest, & most other greenhouse vents. Order more than one and save!
How does a Greenhouse Autovent work?A strong metal tube contains a mineral wax which expands with heat. This pushes a piston which opens the auto vent via a balanced linkage. As the temperature drops, the wax shrinks and a strong spring closes the vent and resets the piston.
Univent Opener Instruction ManualUnivent Opener Installation Video
Have used these 2 years. Completely satisfied. Intended for roof vents, but I install them horizontally to open doors on my hoop house. One got damaged accidentally by a neighbor so I replaced it. ACF Greenhouses gave quick service. Thank you.
We attached a Univent to a new cold frame and it is working perfectly. Thank you for a great product and fast delivery!
We love this product. Acf shipped fast. We will be ordering again.
I have used the uninvent for opening the ceiling vents on my green house for about 5 years I think. First order was through ACF Greenhouses. The vent is made in Denmark and is a high quality vent. Unfortunately the T-clutch broke on one vent so I ordered two more vents from ACF to have spares. Fast delivery. I do wish ACF would carry more parts for the vents. All I needed was the T-clutch which I ordered from the Company in Denmark to repair the one that broke. Actually that was all I needed. Still I do have the two new spares if I have an emergency repair to make.
These units work well - though some parts wear out after 9 years. They're worth replacing when needed!