 on the tank, maybe a 10-year warranty on the tank. But I found that oil-fired water heaters last 20 to 25 years on a regular basis. So the fact that it failed at 13 is just plain bad luck. I have nothing against the idea of you putting in an electric water heater and saving some money there as long as you are using it with a timer. It won't last probably as long as what I would have thought your oil water heater would have lasted, but it will save you some money. I presume your house also has oil heat. Is that correct?