I have an oil fired hot water heater. Not hot water baseboard heat. This has its own burner and only sips oil. My oil tank gage barely moves at all during the non heating season. Last year we used less than 150 gallons for the year and that includes heat oil used to fire the forced hot air furnace to come on when the outside temps drop into the teens. It has been this way for years. Had to replace the water tank after 20 years. Cost me about 1300 for the tank alone.