I can't find any info on this stove insert. Such as year built? Owner has all paperwork which is nice because I don't know what I'm doing. But I will. This is a deal I don't want to pass up if you guys say this is a good stove. Sorry all I have are these 4 pics. It's huge 47x34x14. Goes into fireplace 25" deep. Is this one an adjustable air ratio. Or is it fixed? Does anyone know the wattage of the fans? BTU's? I'm going to go over there tomorrow and check it out, but just wanted some expert advice before doing so. Thanks!