Bayliss Autovent Opener

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Description

This non-electric vent opener is simple to install and is completely automated. A threaded adjuster bolt can set the Bayliss to start opening the vent at temperatures between 55 F and 75 F. This vent opener uses a very simple principal - Special waxes have an expansion rate of about 18% when heated by the sun. As the air in the greenhouse heats up it also heats the powertube in the vent opener. As the wax expands it pushes out a stainless steel piston that slowly opens the vent up to 13 inches. The hotter the temperature the wider the opening. When the temperature cools the weight of the vent and a 6 1/2 pound stainless steel spring closes the vent and holds it closed. This allows the opener to be installed on the roof or a side wall.

Shipping

This product ships via Standard Ground Service.

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Customer Reviews (7)

Love it!!, Apr 16, 2012

By: Aggie (Big Bear, CA, United States)

The opener that came with my hobby greenhouse never worked very well. The Bayliss is probably more opener than I needed but I love it. I'm confident that it will always work properly. Greenhouse Megastore was great to purchase from. I will definitely buy from them again!

This really works, Jan 28, 2012

By: Greg Gentry (Perry, GA, United States)

I was skeptical when I bought this but it works great.

happy with the vent, Oct 10, 2011

By: Nancy (NM, United States)

Installation was quite easy. It doesn't open as much as the 12" advertised as possible, mine opens to about 8". Also wasn't sure if I needed more space below the opener - at what angle it would open. I had a rafter board that it was mounting above. But there doesn't seem to be an issue. Now I can leave town and at least one thing will take care of itself!

Automatic opener, Aug 26, 2011

By: James (Sparta, GA, United States)

This opener was easy to install and has worked flawlessly since being installed.

Must have if you own a large Greenhouse, Apr 28, 2011

By: Chuck (Brackettville, TX, United States)

I was in the habit of opening and closing my vents in AM & PM. I ordered the Bayless AVO & it worked like a charm. No power necessary and I can depend on it. So great! How great. Well, I ordered the second one for the other vent. Both are totally auto. now! Thanks Bayless