only Smell of diesel is for the quick second that you drop a burning pc of paper inside when lighting it. There is a small glass porthole on top and that’s where you light it from. Once it’s burning you smell nothing. My tent has no smell of fuel at all. I would not be able to stand it if smelt of diesel stink. I have the expedition model from their website 30,000 btu and have never turned it up past low. The 12000btu would work great I think.