Tankless hot water heaters provide hot water on demand without the use of a storage tank. When a hot water tap is turned on, cold water travels through a pipe into the unit and a gas burner heats the water. As a result, tankless water heaters deliver a constant supply of hot water and it never runs out.
Efficiency: You won’t waste money heating water in a tank that’s sitting idle. Tankless systems provide the hot water on demand, instantaneously, so you don’t have to waste energy heating unused water. In fact, a tankless water heaters uses 30 to 50 percent less energy than units with tanks.
Longevity: While a typical tank water heater is supposed to last 10 to 12 years, tankless water heaters last up to 20 years.
Space: These space saving tankless heaters can even be installed on walls or under cabinets. They can even be placed outdoors with the addition of a anti-freeze kit.