I am still trying to locate an outside air kit, literature for one, or even a photo of one for my old Trail Blazer stove. I can fabricate one , as it seems pretty obvious as to how it would function, but I'd like to be sure. After looking inside the stove the other day, I confirmed there is only one fan serving combustion, convection and exhaust. This means that with an OAK installed, it would not only be using outside air for combustion (good), but also for convection (seems bad). It seems that continuously trying to heat frigid outside air and push it into the room would not be very efficient. I have read that the main purpose of an OAK is to avoid negative pressure in the home, but in this case, wouldn't it cause positive pressure? Would I have to open windows to get any heat out of the stove?