Originally Posted By: Michael Barry
This post was automatically imported from our archived forum.
Home was built in 1986. Bi-level, no basement. Natural gas furnace and hot water heater located in garage. Furnace is upflow condensing gas, Whirlpool label but apparently made by Heil, Model NUGK050LF01. Exhaust is vented through a PVC pipe that exits through roof. There is no outside air intake pipe.
Contemplating replacing furnace with two-stage model.
2 contractors propose to install the same way present furnace is installed.
1 contractor proposes to install with 2 pvc pipes going through side of house for air intake (combustion?) and exhaust.
1 contractor proposes same but with pvc pipes going through roof.
It has also been said that the replacement furnace cannot sit on the floor like the present one but must be raised and set on blocks.
Altho’ we’ve lived for over 18 years with the furnace drawing air from the garage, it seems logical that an installation drawing outside air would be better (no brainer?).
Opinions, advice, comments deeply appreciated and will probably help me out of this quandry. Thanks.