DIYbanter - View Single Post

wrote:
replace the furnace and hot water tank with the direct vent 90+ types.

this will elminate the need for the chimney and save lots of energy

remember the existing fornace and hot water tank flues exhaust heated
air from your home 24 / 7

How much they will save depends entirely on what they have now. To
replace an existing 80% furnace and hot water heater that have a lot of
life left to try to save money usually isn't going to be cost
effective. And going from 80 to 90 hardly qualifies as lots in my
book. Sure, if they need a new furnace, then I would go with the 90,
but if they just want to remove a chimney for asthetics, this is all
gettting very expensive.