How It Works: Tankless Water Heater
In this "How It Works" article, Rob Yagid explores the inside of a tankless heater and describes what happens at each step of the heating process.
Synopsis: Tankless water heaters, which produce hot water on demand rather than keeping a tankful of water constantly hot, are becoming increasingly popular as builders and homeowners realize how much energy they can save over a conventional tank-style heater. In this “How It Works” article, associate editor Rob Yagid explores the inside of a tankless heater and describes what happens at each step of the heating process.
Unlike tank-style water heaters that keep a barrel of hot water ready to go 24 hours a day, tankless water heaters can help you to save energy and money by heating only the amount of water you need, and only when you need it. Manufacturers say that by heating water on demand, tankless water heaters provide a 30% savings in water-heating costs and a 50% decrease in energy consumption.
Electrician Brian Walo and plumber Shannon Neff show how to install a gas fired Rinnai tankless water heater. However, several manufacturers, such as Bosch and Takagi, make tankless water heaters that work in similar ways. Regardless of the manufacturer, a tankless water heater is one of the smarter pieces of equipment that you can install in your home.
To explore our graphic on tankless hot water heaters, click the View PDF button below.