Noritz Water Heater

NC1991 OD Outdoor Tankless Water Heater

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.


Product Features

Technical Specifications

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 burner

– 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.

Outdoor Unit Dimensions

- 23.6” (H) x 13.8” (W) x 9.4” (D)


- 54 lbs

Gas Consumption

- Min: 16,000 btuh

- Max: 199,900 btuh

(NG & LP)

- Natural Gas/Propane

Energy Factor

- LP: .88 NG:.82

Temperature Settings

- 100-150° F (in 5° F Intervals) 160° F 170° F 185° F