Noritz NC199DVC 199,000 BTU Concentric Vent Commercial Tankless Water Heater (NG)

With more power than any tankless water heater in its class, the NC199 series is ideal for mid-size homes with up to 4 showers. Built-in features include safety lock-out, freeze protection, and high elevation adjustment. PVC CANNOT be used for venting. These units offer several innovations: Safety lock out - Default max. 120 degrees (refer to owner's manual for higher temp) Dual flame burner - Noritz exclusive! Minimizes temperature fluctuations. Fully modulating - Automatically adjusts burner level accordingly. Turbo Flow - Up to 9.8 GPM @ 35 degree temperature rise (7.5 GPM @ 45 degree rise). Quick Connect - Doubles the output by connecting two identical heaters. Direct ignition - No standby pilot light. Thermal fuse - Automatic overheat protection system. Resin coated PC board - Increases durability and protection from elements. Automatic air regulator - Monitors internal temperature/maximizes burner efficiency. Commercial grade heat exchanger - 25% thicker piping than our competition.