A central, whole house, gas tankless water heater can cost $ $, or more, without installation. Because tankless systems typi.y require the addition of a V V outlet and or larger diameter gas pipes than found in an average home, installation can bring the total cost to $, $, or more..Whether you are replacing an old water heater or installing and new system, you may be concerned about the price. There are a number of factors that play a part in the cost of installing a new water heater. Tank vs. Tankless. Average cost with installation Tank $. gallon tank Tankless $,..Heating water amounts to nearly of a home’s energy costs. If you’re installing a new water heater or replacing one that no longer works, The Home Depot . and ENERGY STAR certified water heaters provide water to your home less water heater has lower operating costs, Water Heater Installation .
Tank vs. Tankless. Average cost with installation Tank $. gallon tank Tankless $, .