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Building Science, Rinnai Tankless Water Heaters

Rinnai Tankless Water Heaters, Building Science


The Rinnai company was founded in Japan in 1920. In 1974, the company came to the United States and focused predominately on the propane heating business. In 2001, they introduced Rinnai tankless water heaters to U.S. consumers. Today, much of the world relies only on tankless water heaters. With such worldwide success, there has also been a substantial shift in US consumers towards the tankless option to conserve energy and cut costs.

The tankless water heater is an ‘on demand’ water heater for commercial and residential use. It relies on a modulating heat exchanger to quickly and efficiently heat water to a specific desired temperature as it is pumped up from the ground into the home or business. By doing away with a continuously heated tank, the Rinnai water heater saves approximately 40 percent on energy costs. Each of the tankless water heaters uses less electricity than a 60 watt light bulb. Its tankless water heater also does not use much natural gas to heat the water because the unit’s heat exchangers only turn on when it needs to heat water quickly.

Rinnai tankless water heaters come in free-standing, and wall mount designs. Multiple units can also be installed together in groups of up to 25 for large commercial consumers such as restaurants and hotels. The small size of the tankless water heater makes it ideal for areas where a large traditional water tank heater would not suffice. The space-saving areas created by installing a tankless water heater can then be used for other purposes.

All Rinnai tankless water heaters can be customized at the factory to meet each client’s unique requirements. Rinnai will work one-on-one with developers, consumers, or contractors to meet each application needs.

Contact to learn more about the many benefits of a Rinnai tankless water heater.