[Realism]

Electric heat is 100% efficient, seems like a good place to start? Never looked in to it that closely.

Electricity (MWH) 3,412 BTUs/kilowatt hour

Fuel Oil (gal. 000’s) 138,700 BTUs/gallon

Nat. Gas (cu. feet 000’s) 1,031 BTUs/cubic foot

LPG/Propane (gal. 000’s) 95,500 BTU/gallon

Coal (short ton) 24,580,000 BTUs/short ton

Purchased Steam (BTUs) 1,000 BTUs/pound

[thackney]

Electric heat is 100% efficient, seems like a good place to start?

Keep in mind you pay for quite a few inefficiency in the process of generating and bringing the electricity to your house.

2007 data available by clicking picture.