On Dec 21, 10:33*am, wrote:
All,

Last night, the temp here in Iowa dipped down to around -10 with a -35
degree windchill. *This morning I noticed the temp was about 4 degrees
off of where I had the thermostat set (It was set for 68, but the
heater was running continuously to keep it at 64). *Right now, the
temp has risen to about -5 and the heater is running continuously to
keep the house at about 66-67 degrees.

When you look at the windchill, I think this is probably one of the
coldest days since I moved in 2 years ago.. Does this sound normal, or
could there be an air flow problem? *The amount of hot air coming out
the vents seems to be normal compared to warmer days.

Thanks,
Dan

Now tell us when was the last time it was serviced, by anyone.