Heil product which is located in a basement. The numbers on the side of the unit are: H9MPD100J14A2 L022488510
This unit has two 3" PVC pipes running up vertically (for 3 feet), then run horizontally for about 17 feet before joining together into a single pipe. The single pipe then runs outside. One pipe is the fresh combustion air; the other is the flue.
At the unit, a substantial amount of condensate drips from both pipes.
What can yall tell me about this unit?