I think the heat-exchanger on my 45 yr old Forced Hot Air furnace is beginning to go - we've had two CO alarms in the last month. I live in New England and am going to replace it.
1) the guy who i want to have do the work likes American Standard - should I? If not, what are the good brands?
2) Current furnace is 140KBTU in, 80% efficient. Maintains temperature fine, but can take about 1-2 hrs per degree to raise temp. Should i get something a little bigger?
3) I'm offered 85% or 90% efficient models (latter is a few hundred more) - I assume I should go for the 90%. I value reliability, so I don't think I want to bother paying up for a few extra percent.
4) My drum humidifier works fine (it's on the return), I maintain it. It is 18 yrs old though. Should I replace it (has the technology improved?) or re-use it?
5) I don't -have- to go direct-vent, but I would assume I want to (or don't I have to with a 90% efficient furnace?)
6) By the way - my old system was a coleman "high-velocity' system with 4" ducts. I assume if i get an oversized (or A/C-sized) fan I should be ok. (I have a separate A/C system in the attic)
THANKS SO MUCH -
[Edited by jeffw_00 on 01-03-2006 at 10:23 AM]