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NCC1991 Condensing Commercial Tankless Water Heater

Noritz Tankless water heaters provide a continuous flow of hot water, so there’s no need to suffer through a cold shower if you’re the last one out of bed, and there will always be plenty of hot water instantly ready for other uses when you’re done. The hot water is always there when you need it with a tankless water heater, unlike with a conventional tank-type water heater, and with a tankless water heater, water is heated as it passes through the unit so you will always be using a fresh supply of perfectly heated water.

These NCC1991 tankless water heaters feature:

  • Recaptures the heat from the exhaust and uses it to preheat incoming water before passing it through the main copper heat exchanger, allowing this model to heat more water without using more fuel
  • Efficient use of waste heat to preheat incoming water also cools the exhaust gasses, allowing this unit to be used with PVC venting material
  • Designed to provide endless hot water for residential or commercial applications
  • Direct vent (DV) models draw air from the outdoors so they do not use any air from the indoor installation location, making them ideal for tight spaces or where indoor air is unsuitable for combustion
  • Adding a quick-connect cable allows the installer to quickly and easily connect 2 identical units to double the hot water flow rate
  • Also designed to work with a multi-unit system controller to connect up to 24 units to meet even greater hot water demands
  • Built-in neutralizing system for condensation means less wear and tear on heat exchanger
  • Direct ignition means no standby pilot light to waste energy
  • Commercial grade heat exchangers and fully modulated burner work together to provide increased efficiency, stabilize temperature fluctuations, and boost performance of the flow rate for long life under heavy use
  • Corrosion-free stainless steel casing protects the unit and allows for more efficient cleaning which reduces labor and maintenance costs
  • Self-diagnostic onboard computer system, combined with the included digital remote, provides ease of maintenance and temperature adjustment


Noritz NCC1991 Condensing Tankless Water Heater Specifications:

  • Thermal efficiency: 93%
  • Flow rate: 0.5-11.1GPM – click for flow rate chart
  • Temperature settings: 100-180°F (14 options)
  • Gas connections: 3/4″ NPT
  • Water connections: 3/4″ NPT
  • Water pressure min: 15psi, max 150psi
  • Gas input min: 11,000 BTU max: 199,900 BTU
  • Gas supply pressure: NG 4.0″ – 10.5″, LP 8″ – 14″
  • Weight: 73 lbs
  • Air supply/exhaust: Power vented
  • Actual electrical consumption in Watts:
  • DV Models: (NG)115W, (LP)120W, freeze protection 213W
  • OD Models: (NG)106W, (LP)109W, freeze protection 213W
  • Actual electrical draw is less than 4 Amps
  • Dimensions: 24.4″h x 18.4″w x 9.4″d
  • Exhaust meets low Nox emission requirements
  • 4″ stainless steel vent pipe recommended
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