Noritz NRC661OD 120,000 BTU Tankless Water Heater - HCNAC1020-NG

Noritz NRC661OD 120,000 BTU Tankless Water Heater - HCNAC1020-NG

The ENERGY STAR rated NRC661 DV, 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 DV 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

• C20

Specifications

Package Include

• NRC661 OD | Tankless Water Heater

• Energy Guide

• Installation Manual

• Owners Guide

• Parts List

• Technical Specification

What Our Experts Think

• Outdoor-Ready Performance: Built for exterior installation, saving indoor space while providing powerful hot water delivery.
• Energy Efficiency: With 120,000 BTUs and condensing technology, it reduces energy consumption and lowers utility costs.
• Compact and Lightweight: Space-saving design ideal for smaller homes or applications with limited installation options.
• Environmentally Friendly: Complies with ultra-low NOx emissions standards for reduced environmental impact.
• Durable Construction: Weather-resistant materials ensure reliable performance in outdoor conditions.

Q&A

Q: What is the Noritz NRC661OD Tankless Water Heater?
A: The Noritz NRC661OD is a 120,000 BTU natural gas outdoor tankless water heater designed for residential use, providing endless hot water with high efficiency.

Q: What is the maximum flow rate?
A: The NRC661OD delivers a maximum flow rate of up to 6.6 GPM, suitable for small to medium-sized homes.

Q: Is it energy-efficient?
A: Yes, it has a 0.91 UEF rating, ensuring reduced energy consumption and lower utility bills.

Q: Does the NRC661OD require venting?
A: No, as an outdoor unit, it vents directly to the outside, eliminating the need for additional venting components.

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

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

Maintenance Tips

• Descale Annually: Flush the heat exchanger with a descaling solution to prevent mineral buildup.
• Clean Inlet Filter: Check and clean the cold-water inlet filter every 6–12 months to maintain optimal flow.
• Ventilation Check: Ensure the outdoor exhaust vent is free from obstructions like leaves, dirt, or snow.
• Inspect Gas Lines: Regularly examine gas connections for leaks and secure fittings.
• Monitor Error Codes: Respond to error codes promptly using the troubleshooting guide in the manual.
• Exterior Cleaning: Wipe down the outer casing to prevent dust and debris accumulation.
• Professional Annual Inspection: Schedule a certified technician for a yearly check to ensure safety and peak performance.