Sorry for the amature question!
I need to replace my furnace soon. It'll probably last another couple years but I want to have options for installation rather than be subjected to an emergency install in the middle of the winter.
The furnace sales people I've spoken with say that a new high efficiency furnace must vent out out the side of my house. I have a very old house (115 years old) an most of the basement is at ground level (most areas do not extend above the ground line). It's also a rowhouse, so I'm attached on both sides.
The front of my house is above-grade, but aesthetically and functionally it doesn't seem to make sense - there's a huge window that opens, a gas meter and an old metal awning overhanging the entire front of the house. There's also the concrete porch which forms part of the basement entrance, so my clearance on the front of the house is very small and limited as to where the vents can go, if they can legally be placed there at all.
So I started researching whether I can use the existing chimney where the current furnace is vented through. I understand the physics involved (hot air rises, HE furnace exhaust isn't hot enough to rise reliably to exhaust all the fumes), but I'm wondering if there are alternatives for people in my situation. Is there a power venter that can assist the gasses and blow them out the top rather than relying on hot air rising? I can't seem to find a clear "yes it's possible" or "no, it's impossible" answer.
Many thanks for any suggestions or reality checks!
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