For our luxury line, we have the 931 series which can provide endless hot water for up to 4+ showers.  And with its Quick-Connect system, two units can be linked together to meet the high demand of today’s luxury homes.  To accommodate the higher flow rate demand, these units have a dual flame burner, a redesigned heat exchanger and 25% thicker copper piping.  No other tankless water heater in its class can beat its performance, dependability, and quality.  Built-in features include safety lock-out, freeze protection, and high elevation adjustment.  PVC CANNOT be used for venting.

Click here for installation photo.

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 11.1 GPM @ 35 degree temperature rise (9.3 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.

Fully modulating - Automatically adjusts burner level accordingly.

Commercial grade heat exchanger - 25% thicker piping than our competition.

*The US Department of Energy considers any water heater that is 200,000 BTU/h or greater to be a “commercial” water heater, and therefore does not allow such products to be rated with an Energy Factor, which is based on residential usage.

>> Available in Natural Gas (NG) and Propane (LP) models only.

>> Temperature Settings: 100-180^oF (14 options)

>> Thermal efficiency for all models: 84%

>> Self-diagnostic onboard computer system

>> Battery back-up compatible

>> Recirculation compatible

>> Digital remote included

>> WARNING!!!  PVC cannot be used for venting.  Use only Category III (4" stainless steel venting).

>> Accessories:

• Isolation valves (#IK-WV-8-TH or #IK-WV-8-SW)
• Outdoor vent cap (#VC-4-1) for N-0931M model only.
• Pipe cover (#PC-3S)
• Remote controller outdoor junction box (#RC-OJB)
• ScaleShield (#SS-HB-2)
• Quick-connect cable (#QC-1)
• Recess box (#RB-900) for N-0931M-OD model only.