New Furnace

[jazz4cash]

Schedule 40 PVC pipe? It's very cheap and all that these furnaces need/require. But installers do like to vent them through the nearest wall.

I wondered where that came from as well. I thought it might be due to using concentric pipe that combines the intake and exhaust air. We recently switched HWH from electric to high efficiency gas which works on similar principle as the furnaces. It was tough to convince installer NOT to run through the nearest wall which was 10 ft away. Finally agreed to run it 30ft and had to hammer drill through a concrete wall. They never raised the install price and left behind 2 -12 foot sections of 4 in PVC that I will re-purpose for another project.