Furnace service call I ran into a couple of years ago. Furnace was vented into the metal chimney. Needless to day it was easy to sell them on some new venting. I even went as far as talking to the local supply house that sold the unit to the "contractor" and showed them the picture. Gives them something to think about, when they sell to anybody that walks through the door.
Name:  ImageUploadedByTapatalk1353794774.151008.jpg
Views: 958
Size:  45.0 KB