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The ENERGY STAR rated NRC661, Noritz's ecoTOUGH Series of gas fired residential condensing tankless water heaters, is designed for smaller homes and multi-family dwellings. The indoor (the two-pipe, direct vent NRC661-DV) is a new wall mounted unit that has an energy factor (EF) of 0.91 for natural gas and 0.93 with liquid propane - approximately 30 points higher than a standard, stage tank-type, gas-fired water heater.
Noritz prides itself on being the best tankless water heater manufacturer to supply all of your commercial hot water needs. To determine which tankless water heater model is right for you, you first need to identify your peak hot water usage. The estimation chart shown can guide you to find the right sized commercial tankless hot water heater for your commercial building. Please note that this unit must be mounted indoors and has a twin pipe direct vent configuration.
Each showerhead illustrated above is about 2 GPM, which is roughly what a standard showerhead, bathroom sink, dishwasher, and washing machine would use. To meet all commercial hot water heater needs, these tankless hot water heaters can be linked together to provide on-demand hot water for every application. The number of showerheads next to each series shows the heater’s capacity of providing hot water simultaneously.
PLEASE NOTE: The chart is for ESTIMATION ONLY. Before installation, have a registered plumber size the application according to Noritz Specification Sheets to ensure the model can accommodate your hot water needs.
Approvals - CSA, UPC**, NSF, Low NOx Approved by SCAQMD [<14ng/J or 20ppm], This product complies with California AB 1953 Low Lead Law.
|Manufacturer Part Number||NRC611-DV-NG|
|Professional Installation Required||Yes|
|Dimensions (W x H x D)(inches)||13.8" (350mm) x 23.6" (600mm) x 6.7" (170mm)|
|Shipping Weight (LBS)||38 lbs.|
|Condensing or Non Condensing||Condensing|
|Temperature Control Included||Mounted on unit (Optional RC-7651M Remote Controller available separately)|
|Mounting Location||Indoor Wall Mounted|
|Residential or Commercial||Residential|
|Fuel Source (Factory Default)||Natural Gas|
|Gas Burn Rate Min/Max (BTU)||15,000 - 120,000|
|Thermal Efficiency||Fully condensing, 93% efficient for use with natural gas or propane|
|Hot Water Capacity Range Min/Max (GPM)||0.5 - 6.6 GPM (2 - 25.0 L/min.)|
|GPM @ 30° water temp rise(southern climates)||6.6|
|GPM @ 70° water temp rise(southern climates)||3.3|
|Factory Pre-set Temperature (°F)||120°F|
|Water Temperature Range (°F) (no remote/standard remote)||Built in display can preset the output temperature to either 120°F, 135°F, or 140°F|
|Direct Vent Only||The DV model can also be converted to a non-direct vent (SV) model with the use of a Conversion Kit (#SV-CK-3)|
|Vent Type Description||Direct Vent|
|Max Vent Distance||62' with 3" or 4" PVC or CPVC piping|
|Fuel Source Pipe Diameter Required||3/4" NPT|
|Fuel Source Connection Size||1/2" NPT|
|Min/Max Fuel Source Pressure (WC)||4" - 10.5" W.C.|
|Water Pressure Required (PSI)||15-150 psi|
|Cold Water Inlet Connection||3/4" NPT|
|Hot Water Outlet Connection||3/4" NPT|
|Electical Hookup||120 VAC (60Hz)|
|Anti Frost Protection||138W|
|Number of Heat Exchangers||2|
|Heat Exchanger Material||Manufactured with commercial grade copper, 25% thicker piping than standard models|
|Warranty Heat Exchanger (years)||12|
|Warranty Parts (years)||5|
|Included Accessories||Anchoring Screws|
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