Heat Activated Roof Ventilation 

Excellent explaination in 1 min. Wow

I'm with you!!! Manufacturer or location for purchase please? Cheers

Where is it sold?

yo where can we purchase this?

I bet it leaks when it rains. Also, I would imagine that the volume of air flowing through it will be fairly low.

Hello, what is the manufacturer and name of the vent? So that I can get one

No where online can I find a heat activated vent that is not a arm for a greenhouse, go figure.

is there water leak risk when it rains?

You are fucking insane! Good idea worth, about $500 max and you are selling it for almost $4,000!

Big Dave "has all the right safety gear on" but it doesn't do him any good because he's NOT tied off! Secondly, that was a horrible installation. The uphill side of the base flange spans over the corrugations so water will pour right in, unless he is going to install an umbrella flashing over it with the high end tucked under the high-eave trim, and use some foam closures and caulking on the low end and the sides.

Total crap