thanks for the replies, I went ahead and took my left over high heat ducting for my heater output. and put it over the existing wrap. excluding muffler(it was too big to fit in) and it does not get all that warm anyways. did a test run on it and looks like it will work good gets warm but not hot and can hold onto it for as long as i want. shouldn't be any concern with it now. thanks for the info and the tip Will-C