I bought a 1983 model Hearthstone wood burning stove with a glass window with a screen over the glass,stove was used 3 times total,very nice peice,it has the thermostat wire dampneron the back,also has a damper on the top left hand corner,,and also has a vent on the right side of the stove thats connected to a long pipe with holes in it that runs thru the stove,what is the purpost of all these? Just installed it in my log cabin in Golconda IL,,I will post pictures of it after christmas,i will be spending time there along with my new stove,did a lot of stone work for looks,be sure to check out the pictures when i return..Thanks Guys,been learning on your site,you guys are great....