I recently got a Buck stove 26000 or 27000 not sure exactly which one. My question Is about installation, the manual says to install it into fireplace and seal with faceplate and use existing box and chimney for venting. I know this is an old stove and manual and am wondering if I need to install 8" SS piping up the existing chimney with an adapter, which is clay lined and has been inspected and is good. Any information about the proper way to install this stove would be great.