Whats the difference between regular hot water tanks and tankless?
Besides the space needed for the unit, regular hot water tanks heat the water at all times, whether it is calling for heat or not. The tankless water heaters automatically adjust the burner to give you a constant outlet temperature depending on water flow. Initially they cost more but the life expectancy of a tankless water heater is 15-20 years where a regular hot water heater is 10-12 years.