Rheem GNU76-200 Low NOx Universal 76 Gallon Commercial 199900 BTU Water Heater – Wholesale Water Heater

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RHEEM GNU76-200 Universal Low NOx 76 Gallon Commercial 199,900 BTU Water Heater Natural Gas

  • Brand: Rheem
  • Availability: Drop Ship
  • SKU: GNU76-200



  • Description
  • Specifications
  • Comparable Brands

Commercial 76 Gallon Universal Low NOx 199,900BTU Natural Gas Water Heater; Brand: Rheem; Model #: GNU76-200; Series: Rheem Universal; Automatic Flue Damper; Direct Spark-to-Pilot Ignition System; 3-Year Limited Tank Warranty; Space Saver Design; Used in Motels, Hotels, Gyms, Schools, Restaurants, and Businesses.

BrandRheemWeight540 lbsHeight68-13/16"
ModelGNU76-200Gallons76 galDiameter26 1/4"
Warranty3 YearsBTU199,900 BTUVent Size6"
Fuel TypeNatural GasEfficiency80%Vent TypeStandard


A.O. SmithBTL-180180,00010082%27-3/4"65"
Bradford WhiteD-80T-199E-3N199,9998080%28-1/4"71-7/8"
StateCXN180 100180,00010080%27-3/4"72"
StateCLN180 100180,0009382%27-3/4"76"
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Specifications Manual Brochure Warranty

Universal Low NOx and Ultra Low NOx gas commercial water heaters are specifically designed to minimize the difficulty of replacing failed water heaters and are versatile for new installations. These products comply with our country’s air quality legislation.

SPACE SAVER DESIGN The short heights and narrow jacket diameters, plus the top, front and rear water inlets/outlets offer the ultimate in installation flexibility.

PATENTED MULTI-FLUE TANK DESIGN Patented multi-flue design, and two coats of high temperature porcelain enamel to maximize corrosion resistance result in a superior heat exchanger design.

LOW PROFILE AUTOMATIC FLUE DAMPER Low profile design minimizes overall product height. Heavy duty vent hood supports are designed to withstand rigors of installation.

DIRECT SPARK-TO-PILOT IGNITION SYSTEM Standard on all models. Energy saving ignition that ignites pilot only when there is a call for heat.



HAND-HOLE CLEANOUT For removal of lime/sediment deposits.

MANUAL RESET HIGH LIMIT All ASME models are factory equipped with a manual reset high limit to meet the code requirements of many states.

PATENTED ANODE RODS Anode design utilizes multiple magnesium rods to ensure corrosion resistance for a long tank life.

LOW NOX BURNER The power assist burner design incorporates stainless steel multi-port burner tubes for long term low NOx performance, less than 40 ng/J. A sight glass allows for burner observation. A blower guard provides protection against potential post-installation damage.

ULTRA LOW NOX BURNER The power assist burner design incorporates stainless steel multi-port burner tubes for long term ultra low NOx performance, less than 14 ng/J. A sight glass allows for burner observation. The entire design is removable and it is highly resistant to the effects of negative air pressure common in modern commercial buildings.

ULTRA LOW NOx BASE RAIL Provides for better handling when moving and positioning unit.

WARRANTY 3-year limited tank warranty.