Reds:
What would you say your cost savings are annually?
The numbers are all over the map, but here they are along with temps and price per gallon of propane - For Jan+Feb+Mar- which are my expensive months for heating. Nothing has changed as to area heated or equipment. Switch to cold water was in the fall of 2009. And propane prices went up dramatically (20%)from 2007 to 2008
2008: $7600 - 2.50/Gal - Mean temps. Jan 28-Feb 24-Mar 32
2009: $2600 - 2.30/Gal - Mean temps. Jan 17-Feb 26-Mar 36
2010: $3100 - 2.55/Gal - Mean temps. Jan 23-Feb 24-Mar 40
2011: $5700 - 2.80/Gal - Mean temps. Jan 20-Feb 25-Mar 31
You can see the variation in all the numbers. I got my weather history from Weatherunderground.com and my prices from EIA website. This is just my experience and the weather has a tremendous impact on amount of fuel used. Even if the mean temp is not as cold as the prior year the wind could be blowing hard non stop and run the usage up - I have a constant north wind blowing at the entry side of my wash all winter long. Propane prices on the bill are also adjusted for temperature due to the physics of propane, which in my opinion opens the
door for some chicanery. But no matter how you cut the cake my heating expense is down.