You will never take another cold shower or bath! A tankless gas water heater can provide an endless supply of hot water for your shower or bath. Noritz tankless gas water heaters are designed and manu-factured for high efficiency -something Noritz takes very seriously. Using advanced technology allows for 83-93% efficiency in their products. Noritz tankless gas water heaters provide an endless supply of hot water on demand; only heating the hot water that is needed. This performance can cut water heat-ing costs up to half.Compact in design, about the size of a carry on suitcase for our residential units, the Noritz tankless water heater allows for installation virtually anywhere, indoors or outdoors. The ex-cellent craftsmanship of Noritz's dedicated employees also makes it possible to deliver water heaters of the utmost quality to our valued customers throughout the world. ALWAYS HOT! - Noritz is the #1 manufacturer of tankless water heaters in the world.