The Gen-Turi works as advertised. A) Make sure your roof vents are closed. B) make sure if you need it, you get the extension tube. C) make sure that the attachment for the supports is adequate. We use a couple large Glass setting Suction cups. if not that, then install mechanical fasteners to connect the straps to.
I don't run it overnight, but then I've not stayed where the temps at night are so brutal as to need it. Not using the Gen-Turi can be the last mistake you will make. Before we had it were watching TV and running the genset to charge up, everyone started to get a bit drowsy and the alarm went off. we were close to a point by that time that it wouldn't have mattered! The wind had been blowing away from the rig, no problem, but it shifted and started drifting the exhaust underneath. One time was more than enough!!!