Hi all,
I need to replace a 40 year old furnace in my 1100 sqft bungalow in Edmonton, Canada.
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 costwise.)
Lennox G61MPV-36B-70 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,
Zorrolf