I just purchased a new DAKA wood furnace and a lot of supervent stainless class A flue at Menard's on sale last week. It's installed now in my shop and drafts and burns good, really heats up the shop, and a far cry from the last barrel stove I used in a garage years ago. I put the stove pipe to stainless adaptor direct on the back of the furnace and went right to the supervent 3' piece that runs horizontal through the thimble and out the wall into the 90 deg box with 5 more stainless sections up to the cap. Is it OK to go right into the stainless like this or do I need a short length of stove pipe out the back of the furnace into a 1' piece of supervent through the thimble and do I need the automatic damper they sell at Menard's? My clearances are all good I just really want to do this right.