One of our customers gave us some data about their savings from converting to electric comfort heat by providing us with their utility bills amounts after converting their entire house to electric heat (every room, which they carefully control and only heat the rooms they are using, when they are using them.) The electric heat was installed in late October of 2009. They have an electric dryer, propane water heater and central air conditioning. They are a family of 5 with a ranch house in Michigan with less than 1,400 square feet on the main level and an unfinished basement which is unheated.
There were vast differences in the temperatures of the summers and winters of the years looked at and there were big swings in the price of propane:
Rate from 07/07 to 07/08: $1.92 per Gallon
Rate from 07/08 to 07/09: $2.07 per Gallon
Rate from 07/09 to 03/09: $2.57 per Gallon
Rate from 03/09 to 05/10: $1.75 per Gallon
The electricity rate in Michigan is almost 13 cents kwh.
The customer provided two different time periods of data. Here is the data (both from mid-year to mid-year and calendar year:)
In addition the customer has kept the house quite a bit warmer in the last year due to having a new baby.
The cost of the heaters was $780, which will paid for by the savings in this second year. They are also insured against another dramatic future increase in the cost of propane. The customer is also considering wind power, fuel cells and solar power to supply the house with free electricity to power the heaters, etc.