need new furnace for 1200 sq. f.t. house
I've been checking out the site and decided this is a great place to get some expert advice on our looming "new furnace" decision!
We're finally at the point where we're ready to exchange our good ole 80+ year old monstrosity of a gravity-feed furnace! You know, the kind that looks like an octopus and takes up over half the basement?! It's definitely served its time, has been running pretty flawlessly for me for nearly 12 years, but the old soldier is running at lss than 50% efficiencyÂand I'd kind of like to have some basement space!
We're going with a local co. here in WA state that carries Lennox and is highly regarded with BBB, our power company, etc. My question is this: with relatively mild temps year-round, a fairly small 1.5 story 1921 home (1200 sq. ft.), insulated attic/basement ceiling/blown-in wall ins. and new vinyl, double-paned windows throughout the house, which would be the better furnace: the Lennox G71MPP-36B-070 furnace or the G71MPP-36C-090?
The rep has recommended the 70 over the 90, but with no way to heat the top story (no place to run ducts) we're concerned that the 70 wouldn't do as good a job as the 90. Right now we seal off the stairwell and use space heaters upstairs to warm up the bedrooms in cold weather.
We like the idea of a smaller, less-expensive furnace, but want to make sure it's going to meet our needs. We'll also have a vent for our unfinished basement, too, so we can eventually heat it when we convert it to a workshop space.
Any thoughts? Oh, and the furnace is gas-powered. Also, thermostat thoughts are most welcome!!
Thanks so much for any thoughts and recommendations!