I just topped off my oil tank and it took 102 gal. My last fillup was end of April and I never touched the heat once, in fact, the thermostats were all turned off at that point,so the only thing the furnace was heating, was hot water. Now I know that oil in not an efficient way to heat hot water, and I'm considering going with an electric hot water heater. But I also want to figure out my breakeven point. Heating the HW with oil cost me .63 gal of oil per day. At $3.85/gal of oil, that's $2.43 a day to heat hot water. Is that bad? I'm curious if any one on here has done the math and knows what the breakdown is for heating HW with electricity. The tricky part is, that in the winter months, I'll be supplimenting my wood stove with oil heat. So, if the oil burner will be running anyway to heat the house at times, then I might as well also use it for the water as well. If not, I'll be running the oil burner for heat, and spending money on electricity to heat the water. What a dilemma. Any suggestions?