I'm in a bind! gah
I recently have a goodman 3 ton, 75k btu furnace installed into one of my rental properties. It heats an area thats about 1200sq foot with 8ft ceilings.
I figured the math using what information i could find and the furnace should be plenty large.
Anyway, after the install was done, it started getting really cold up here in michigan. My tenants have been calling me saying the furnace is not keeping up with the cold! Its getting as cold as 68 degrees inside. The house has new efficent windows but is not insulated well.
I went to the basment to see if anything obviouse was wrong that might be a quick fix. This is the first time I examined the work. Everything looked nice and good, but he only used 8" round duct work and quite a bit of it is flex Duct work.
The runs are fairly log, probably 15-18ft. I just don't think that duct work has enough area and is restricting the heat flowing to the house. On top of that the temp rise is only about 30 degrees! The heat going out is about 85-90.
The heat bill is out f'ing standing.
My primary house has a probably 20 year old 80% furnace and it blows 110 degree heat. It heats up the house (which is larger) fast and my heat bill is $300 less a month. I have poor windows with storms but they are very drafty. It is insulated though.
My contractor says its an insulation problem, i disagree and say its a duct work problem.
I'd get a 2nd opion, but we have but one contractor I've found willing to crawl in this space. Half the basement is a crawl space. Most contractors wanted me to do my own duct work and they will hook it up and check it. I guess in a small town you get to pick and choose your jobs.
Thanks in advace for your help!