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Tankless Water Heater Guide

Tankless water heaters produce more hot water using less energy than the most efficient tank heater. Tankless water heaters are an environmentally responsible water heating solution that saves energy, space and money.

tankless water heater on the wall of a laundry room

Tankless Water Heaters

A tankless or on-demand water heater only heats water when you need it. So you get an endless source of hot water, while also saving money on energy costs by not heating and reheating the same tank of water.

  1. When opening a hot-water tap, or starting the dishwasher, the tankless water heater recognizes the need for hot water and starts the heating process.
  2. The temperature of the incoming water is used to calculate how much heat the burners must produce to deliver water at the desired temperature.
  3. When the demand for hot water ceases, the unit shuts down and uses no energy, waiting until more hot water is needed.
  4. The end result — hot water that isn't limited to what’s available in your tank.

Shop for Tankless Water Heaters.

Benefits of a Tankless Water Heater

Endless Hot Water
You can turn any water source into hot water on demand. You aren't limited to the amount a storage tank heater can hold. Whether you're washing the dishes, washing your clothes or drawing a hot bath, tankless water heater technology will supply endless hot water to your lifestyle demands, even if you do them all at once.

Lower Energy Bills
Take advantage of up to 40% energy savings with a tankless water heater. Units are designed to be highly efficient and only heat water when it's needed.


Tankless water heaters typically last up to 20 years, twice as long as a tank-style unit.

Space Savings
Traditional water heaters can take up to 16 square feet of valuable floor space. Tankless water heaters are about the size of a carry-on suitcase and can be installed on virtually any wall inside or outside of your home.

Clean, Fresh Water
Traditional water heaters can build up rust and scale inside the tank, where the hot water you use for bathing and drinking is stored. With tankless water heaters, you'll always experience fresh, clean water that's heated on demand as it passes through the unit.