Hi there folks,
My contractor wanted to put in a Carrier base model 45k btu furnace. I asked him to upgrade to a variable speed and he told me that in order to get variable speed in a Carrier, I would need to have a 70k btu furnace because that is all Carrier makes. My contractor seemed to think going up in size wasn't a big deal, but it seems to me that it is. I'm concerned about cfm, amount of fuel used, and long-term system wear.
Are a 70kbtu furnace and 2ton heat pump compatible?
Am I better off with the single speed properly sized unit, or the over-sized variable speed?
Some important info:
I live in N. Florida and planning on adding a heatpump to this system in the future and using the gas as backup. My house is ~800 sq. ft. The future heat pump will be a 2ton unit.
Thanks a lot everybody for giving me your opinion.