We purchased a used Arrow 1800 from friends who removed it from a mobile where the stove was installed using the homes forced air duct for its air inlet.. I cant find any reference to this installation technique in the owners manual or here?? Is this efficiant??Pros/Cons?? Aslo my ideal location woud be centered in front of two vinyl windows. The windows are 6 inches apart so there would obviously be a strip of bare wall between the windows and the ledges are wood composite(?) does this strip of wall and the wall below the windows need brick or some heat barrier and is the vinyl of the windows safe that close to the stove..Instruction manual only states a hearth pad is required, not one for the wall so I gues im mostly concerned with the vinyl windows and how the heat may affect them?? Any advice is much appreciated!!