I need to replace a 40 year old furnace in my 1100 sqft bungalow in
I have had several contractors come in to give me estimates and I am
down to 2 companies/furnaces. Both companies seem to have good
installers (as far as I can tell).
The two furnaces I am looking at are (both in the same ballpark
Trane XV90 - TUY100R9V4W (It was quoted as XV90 / 60000BTU)
And here are my questions:
- Are there good reasons to go with the one instead of the other?
- Apparently my chimney needs to be reduced since only the water heater
is going to be vented out there. Some contractors suggested a 4"
'chimney liner' where others suggested to use 4" B-vent. What are the
differences and advantages? And is B-Vent worth 322 CAD more?
- One contractor mentioned that the PVC pipe for combustion air and
exhaust need to be 2" where others suggested 3" pipe. Is it true that
if you have too many elbows you'll need the thicker pipe? And how
important is the sloping of the pipes?
- Right now I have a simple digital Thermostat "with 2 wires". Do you
think it makes sense to upgrade to a 2-stage-Thermostat?
Thank you very much for your advice in advance,