Propane all the way here. I have a 500 gallon buried tank that is filled on a contract. They send me a quote in the summer for $1.99 this year per gallon and I bought 1000 gallons. If I don't use it they will send me a check or just keep it on the account for next year. The conversion btu is 96,000 btu per gallon of gas. A Water heater is 45,000 btu's or 1/2 gallon per hour. The furnace are usually 1 gal per hour. The 92% efficentcy units are vented through PVC pipe and will eliminate any chance of chimney fires in the future. You can also check into a wood stove shaped gas fire unit that burns 30,000 BTU per hour that is on a thermostat and does not need to be vented. If you need any other info call or P.M. me.
Art