Me too. My slider is for the most part closed except during minus* weather. The thermo flap not only works real well maintaining a consistent house temp, but I've found that on my very rare puff backs/ gas booms, my back flap takes the brunt of the situation. I would very STRONGLY not recommend doing this. Hitzer has spent yrs making a fool proof system that tried & true, works incredibly well. SCT, get a hobby & let the stove builders do what they do best. Do you need me to send you an operators manuel??? Granted, there are always productive improvements on any stove, but I think this idea may fall into the "what not to do safety issue wise" Hell dude, anybody can do a 24 hr run (minimum) on one of these Hitzers, running them as suggested by the Hitzer people.