Noritz NRC661DV 120,000 BTU Tankless Water Heater - HCNAC1019-NG

Noritz NRC661DV 120,000 BTU Tankless Water Heater - HCNAC1019-NG

The ENERGY STAR rated NRC661 OD, Noritz's newest efficient condensing model with a half inch gas line. Featuring the same energy‐saving condensing technology as the rest of the Noritz eco‐TOUGH™ Series of gas‐fired residential tankless water heaters, the NRC661 OD has an Energy Factor of 0.91 for natural gas and 0.93 for LP. These ratings are nearly 10 points higher than that of a comparably sized, conventional tankless unit, and approximately 30 points higher than a standard, tank‐type gas‐fired water heater.

With a maximum input of 120,000 BTU per hour (BTUh), using a half‐inch gas line up to 120 feet in length. A new, more accurate interpretation of the National Fuel Gas Code permits the use of the smaller‐diameter gas piping for inputs up to 174,000 BTUh, as long as the water column pressure at the inlet of the unit is a minimum eight inches.

Features

• Standard Input: Gas consumption ranges from 15,000 BTUh to 120,000 BTUh

• Capacity Range: Flow rates from 0.5 GPM up to 6.6 GPM

• Compact Design: ANSI Z21.10.3/CSA 4.3 certified design that can be wall‐mounted outdoors

• Durable Steel Casing with Polyester Coating

• Venting Options: Available as an Outdoor (requires no venting) or indoor Direct Vent (‐DV) model which includes special plastic flue adapters that are compatible with both 3" Schedule 40 and 80 PVC/CPVC pipe. The DV model can be converted to a non‐direct vent (SV) model with the use of a conversion Kit (#SV‐CK‐3)

• Direct Electronic Ignition

• Energy Factor: 0.91(NG) 0.93(LP)

• Thermal Efficiency: Fully condensing, 93% efficient for use with natural gas or propane

• Temperature Controls: Includes built in display that can preset the output temperature to either 120°F, 135°F, or 140°F

• Power Cord Installation Kit: 6' power cord is included with ‐DV models only

• Safety Devices: Flame Sensor, Overheat Prevention Device, Lighting Protection Device, Freeze Protection, Condensate Overfill, Fan Rotation Detector

• Additional Features: Temperature Lockout, High Elevation Adjustment, Built‐in display window

Specifications

Package Include

• NRC661 DV | Tankless Water Heater
• Energy Guide
• Installation Manual
• Owners Guide
• Parts List
• Technical Specification

What Our Experts Think

• Compact Efficiency: Delivers 120,000 BTUs, providing continuous hot water for smaller homes or low-demand applications.
• Energy-Saving Design: Condensing technology improves efficiency, reducing energy bills and environmental impact.
• Direct Venting: Designed for indoor installation with flexible venting options to simplify setup.
• Eco-Friendly Performance: Compliant with ultra-low NOx emissions standards for greener operation.
• Durable and Reliable: Premium materials ensure long-lasting performance with minimal maintenance.

Q&A

Q: What is the Noritz NRC661DV Tankless Water Heater?
A: The Noritz NRC661DV is a 120,000 BTU natural gas indoor tankless water heater designed for residential use, providing endless hot water with high efficiency.

Q: What is the maximum flow rate?
A: The NRC661DV delivers a maximum flow rate of up to 6.6 GPM, making it ideal for small to medium-sized homes.

Q: Is it energy-efficient?
A: Yes, it features a 0.91 UEF rating, helping reduce energy consumption and lower utility costs.

Q: Does it require venting?
A: Yes, the NRC661DV requires direct venting with a dual-pipe system for intake and exhaust, ensuring safe indoor operation.

Q: What safety features are included?
A: It includes built-in freeze protection, overheat protection, and flame failure detection for reliable and safe use.

Q: Is professional installation recommended?
A: Yes, professional installation ensures proper venting, compliance with safety codes, and optimal performance.

Maintenance Tips

• Descale Annually: Flush the heat exchanger with a descaling solution to prevent limescale buildup.
• Clean Inlet Water Filter: Inspect and clean the cold-water inlet filter every 6–12 months for smooth water flow.
• Check Ventilation: Keep intake and exhaust vents clear of dust, debris, or obstructions for proper airflow.
• Inspect Gas Lines: Regularly check for leaks or loose connections in the gas supply.
• Monitor Error Codes: Address any error codes immediately by referring to the user manual.
• Exterior Cleaning: Wipe down the casing with a damp cloth to prevent dust accumulation.
• Annual Professional Service: Schedule a certified technician inspection to ensure optimal performance and safety compliance.