A Tankless water heater by Noritz provides endless hot water for tankless hot water heater applications whether commercial or residential. Noritz's advanced tankless water heater technology allows for 80 to 85 percent efficiency in our products. Noritz tankless gas water heaters provide endless hot water on demand; only heating the hot water that is needed. A Noritz tankless water heater can cut water heating costs up to 50 percent.