Hopefully you guys can figure out my problem...
I built a new 2-story home last fall. I have an electric furnace coil which I use as my primary heating source for all 3 levels of the house. I also have an 84% efficient gas boiler which is used for my domestic hot water and for 4 radiant heat zones:
upper garage ~900 sq ft
lower garage ~900 sq ft
basement ~1600 sq ft
exercise room ~150 sq ft
I also have a gas fireplace, gas cooktop, and Aprilaire humidifier on the furnace air return with is tapped into the hot water.
My problem is that my gas bills this winter have been higher than what I was expecting. My first 2 gas bills were:
121 CCF from 10/13/04 to 12/14/04 (1.95 CCF/day)
176 CCF from 12/14/04 to 1/17/05 (5.18 CCF/day)
I have been using the electric furnace coil since we moved in so I wasn't expecting this kind of usage during the winter. I thought the in-floor heat would be fairly efficient/inexpensive but it doesn't appear so. The thermostats on all 4 radiant heat zones are set low enough so they only kick-in when the outside temps are below zero which has only been about 10 days this winter. We have been using the fireplace maybe about 10 hours a week and the gas range for maybe 5 hours a week.
The humidifer is hooked up to the hot water and it has
been running a lot this winter, but I wouldn't think that make the boiler kick-in too much for the hot water supply, would it?
I called the plumber who installed everything and he couldn't really think of anything except for possibly trying to hook the humidifier up to cold water.
Since the radiat heat hasn't been used much since its been a relitively normal winter I'm leaning towards the humidifier as being the source of the problem but I don't know, are there any boiler setting or other configurations I could try?
Thought it would include my location, but anyway, I live in Rochester, MN
[Edited by nixima on 02-01-2005 at 03:45 PM]