Noritz NC1991-DVC-NG Tankless Water Heaters

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 lockout – 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.