The installation cost for a gas water heater can range from $500 to $2,500. ... The installation of a 40-gallon hot water heater typically takes two to three hours for an experienced professional.

Using a natural gas rate of $10.86 per 1,000 cubic feet, we calculated that the payback time for converting from a storage tank gas water heater to a gas tankless ranges from 22½ years to 27½ years.

Enjoy Significant Energy Savings With Tankless Water Heaters. For endless hot water when you need it, and energy savings, consider a tankless water heater installation from a top-rated company on ...

Shopping for a water heater? Read about features, types, and other must-know topics in our water heater buying guide to make an informed choice.

Gas hot water systems. There are two types of gas hot water system. Storage tank gas hot water systems store the hot water in a tank, and reheat the tank as needed.. Instantaneous (or continuous flow) ...