How much does tankless water heater installation cost? a tankless water heater will cost about two to two and a half times as much as a standard water heater to .HomeAdvisor’s Tankless Water Heater Cost Guide gives the average prices for electric and gas systems, installation, replacement, and maintenance as well as cost .Average cost to install a tankless water heater is about $, $, propane powered tankless system and removal of the old system . Find here de.ed .Typi.y a gallon natural gas water heater installation costs between $ and $,. Before you for a water heater installation or a tankless .
Although the initial cost of a tankless water heater installation is greater than installation of a water heater tank, lower operating and energy costs are likely to offset the higher purchase price. ENERGY STAR estimates that a typical family can save $ or more per year with an ENERGY STAR qualified tankless water .