[Fulltiming]

I doubt it would melt but technically, it is only rated for 430 degrees F per UL 2158A “Clothes Dryer Transition Duct” Standard. For a coach without a Diesel Particle Filter, at idle, that should be close to the exhaust gas temperature but but within the limits. A diesel running a DPF has significantly hotter gas, frequently exceeding 750 degrees F at the exhaust. http://www.fs.fed.us/eng/pubs/pdf/08511816.pdf