Dave; Ditto. My forced air burners are made from junk I've accumulated = over the years. A simple i&1/2" "T" fitting with a hole drilled in a pipe = plug for the 1/4" id pipe to go through on one end of the "T" and a length of pipe on the other for the burner tube. The air is forced in the side = opening via an old mobile home furnace blower. Air flow can be regulated with a stiff piece of cardboard over the opening.=20