For the first time Noritz is offering true commercial grade components and materials inside and out.  A re-engineered heat exchanger and industry first dual flame burner boost the heater's power, while lowering minimum flow requirements.  To help ensure the longevity of its performance, we have enclosed the heater’s commercial grade components with a corrosion-free stainless steel exterior casing, giving the look and feel of other professional grade equipment.  The 931 series offers direct vent (DV) units that are ideal for commercial businesses such as restaurants and hair salons that have contaminants in the air.  The N-0931M ASME is for indoor/outdoor use.  The N-0931M-DV ASME is for indoor use only.

Safety Lock Out - Default max. 120 degrees (refer to owner's manual for higher temp)

Dual Flame Burner - Noritz exclusive!  Increases performance and efficiency.

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

*Energy Factor (EF) is a measurement of relative energy efficiency for a water heater; the higher the EF, the more energy efficient the water heater.