works fine on 110, not at all well on 12v (but I guess none of them do) and not at all, currently, on propane
. It did until recently, and I have managed to fix it several times by messing with the flexible black exhaust tube, but finally I gave up and bought a new one. A knowledgeable person might be able to fix this one, or it could be used on 110v or used for parts. I am not willing to ship it or do any more trouble shooting, but if anyone wants it is is free for the taking. It is in Portland, OR. E-mail me and I will send my phone number.