What is the cheapest way to heat a home furnace with today's energy cost... electric, propane, heating oil?

I am in need of a new furnace and was curious if I should stick with using heating oil or convert to electric or propane?





(just FYI i am aware wood and coal alternatives are cheap, but i am looking for something less maintained)What is the cheapest way to heat a home furnace with today's energy cost... electric, propane, heating oil?
I'm a fuel salesperson in Ontario Canada. Right now for every dollar you spend heating with electricity, you would spend $1.18 to heat with oil, $0.84 to heat with propane, and $0.54 to heat with natural gas. These numbers are for this region of Canada, but I would think the ratios, if not the actual numbers would be pretty close for much of North America.





Edit: Oil and propane prices have dropped in recent days considerably! So much so that I will revise my numbers above to the following. Oil $1.07 Propane $0.77. I don't think we are going to see heating prices as high as last winter. I'm telling my customers to just buy fuel at market price and not to lock in this year. I think they will be better off. My customers that were getting locked in pricing of $0.72 cents per litre 10-14 days ago would now be spending only $0.61 per litre...I think I'll be giving out some credits! :^)What is the cheapest way to heat a home furnace with today's energy cost... electric, propane, heating oil?
natural gas is the lowest price per btu if heat. then propane,oil and last electricity. but you didnt mention solar heat... just open the shades when the sun is shinning.. of course this only works during the day.
if you don';t have natural gas,then propane would be cheaper.