Greenhouse vents and ventilation. The two aluminum shutters are dwarfed by the 12 foot long polycarbonate vent



A turbine was one of our first tries for venting the greenhouse, vented both winter and summer, didn't move enough air, and was UGLY
Our first tries with the solar vents were the small cheap ones

Then we found these solar vents.


Our second try on solar vents were the solar aluminum shutters

So then I tried the aluminum shutters, they work.



Then we found the big ones, (gigavents) a thousand + dollars later we had some VENTS!

Then we found the big solar vents that can lift maybe 100 pounds, no more hot house! Two large vents are better than two small vents or one large vent.


The higher you can get the 'out' vent the better it will work, unless you have regular wind, then it needs to go high on the leeward end. Top vent in a polycarbonate greenhouse. The polycarbonate vent from the inside, you make frame, add vent and polycarbonate Poly greenhouses are a little trickier, you have to frame the vents The end of a small polyethylene greenhouse. Tried a combination of passive and an aluminum shutter greenhouse The wall opens at 80 degrees, notice the counter bungee cord pulling against the weight of the wall

If you live in a mild west coast area, little frost, cool summers, then a passive vent made out of shade cloth might be enough.


To see more how to build stuff go to our How to build garden stuff
or
How to build a cheap and easy greenhouse
How to build a simple poly greenhouse.

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Last edited on 2012-04-16 13:08:02.

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