I'm following this with interest as it cost me slightly over 6000 for oil heat last year in Vermont. I have a 2 story old farmhouse about 2500 sq ft. This was my first year. With Steam condensing one pipe radiators. I also have a woodstove and blower in the living room now that we use as temps drop below freezing in the evening and early morning. thermostat at 71 when we get up and in the evening then at 68 for the rest of the time. Bedroom has the radiator off for cooler sleeping.
Here's some of my thoughts as I start the 2nd year. This (and taxes) is my biggest home bill and I want to lessen it as I get closer to retirement in 10-15 years hopefully.
I had an indirect hot water heater connected to the boiler that circulated with a pump ever so often dependant upon tank temperature. That first tyear I heard the boiler turning off and on throughout the night and day keeping water warm. Upon advice of the service tech, I turned the Aqua stat and boiler off for the summer, reconnected the heating elements in the hot water tank and used electricity through the summer. I didn't see a very large difference in the bill. Maybe 20 bucks a month.
The inlet line still runs through the boiler first. Now that I've turned it on, it preheats the water going ot that tank. I hope to see that bill come down some. It's too early to see yet as I only turned the system on 6OCT. If the system breaks down (it is old), then I am strongly thinking on switching to propane.
On another note. My wife opened a small salon and we had to put heat in it and went with propane. Come to find out, her "commercial" rate was quite a bit lower for propane per gallon than our residential rate she has at home for the cookstove only. from the same company with leased tanks.