Noritz CB180DV 180,000 BTU Tankless Water Heater - HCNAC1007-NG
Noritz CB180 Combination Boiler is a year‐round, whole‐home solution that delivers hot water to both plumbing and hydronic heating applications. The unit performs at a 95 percent AFUE (Annual Fuel Utilization Efficiency); that is, 95 percent of the fuel consumed goes to heating the water to the preset temperature, as opposed to being lost through the flue.
This fuel‐saving performance meets "Energy Star Most Efficient" standards, meaning that, with the Combination Boiler, you will be able to qualify for various state energy rebates around the country and offset the initial cost. The CB180 has a maximum input Btuh of 180,000 for hot water and 100,000 Btuh for space heating.
Features
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Standard Input: Gas consumption range from 18,000 BTUh to 180,000 BTUh
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Heating Mode Input: Gas consumption ranges from 18,000 BTUh to 100,000 BTUh
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Turndown Ratio: 6.7 (CB199) and 5.6 (CB180)
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Capacity Range: Flow rates of 0.5 GPM up to 9.3 GPM (CB199) and 9.1 GPM (CB180)
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Compact Design: ANSI A21.13/CSA 4.9 certified design that can be wall‐mounted indoors
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Durable Steel Casing with Polyester Coating
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Heat Exchanger: Manufactured with STS 304 stainless steel
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Venting Options: For indoor installation only. Convertible to Single Vent (‐SV) with the use of conversion kit (#SV‐CK‐3)
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Direct Electronic Ignition
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AFUE‐ 0.95(NG) 0.95(LP)
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Temperature Controls: Includes remote thermostat that can precisely adjust the output temperature with the capability to display temperatures in °C; Domestic Mode: 90°F to 140°F, Heating Mode: 100°F to 180°F
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Outdoor Reset Control: Built‐in customizable programming for Energy Savings and Comfort with Outdoor Temperature Sensor (included)
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Power Cord Installation Kit: 6' power cord is included
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Safety Devices‐ Flame Sensor, Overheat Cut off Limit Switch, Gas Leak Detector Sensor, Water Leak Detector Sensor, Exhaust Temperature Sensor, Pressure Sensor, Heating Supply Temperature Sensor
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Internal Pump: Heating Mode: used for primary closed loop. Domestic Mode: used for pre‐heating of internal plate heat exchanger
Specifications
| Case |
Steel |
| Direct Electronic Ignition |
Yes |
| Energy Star |
Yes |
| Finish Family |
Black |
| Flow Rate @ 35 ºF Rise |
8.3 gpm |
| Flow Rate @ 45 ºF Rise |
7.2 gpm |
| Flow Rate @ 75 ºF Rise |
4 gpm |
| Flow Rate, Maximum |
9.2 gpm |
| Hard-Wired Remote |
Yes |
| Heat Exchanger Warranty |
10 Year year |
| Indoor/Outdoor |
Indoor |
| Labor Warranty |
1 Year |
| Lightning Protection |
Yes |
| Maximum Temperature |
140 ºF |
| Min. Installation Clearance, Front |
4 Inch |
| Min. Installation Clearance, Bottom |
12 Inch in |
| Min. Installation Clearance, Sides |
2 Inch in |
| Min. Installation Clearance, Top |
12 Inch in |
| Minimum Activation Rate |
0.5 gpm |
| Must ship freight |
Yes |
| Parts Warranty |
5 Year Limited Parts Warranty |
| Product Depth |
14.8 in |
| Product Height |
28.7 in |
| Product Shipping Weight |
90 lb |
| Product Width |
17.33 in |
| Recirculation compatible |
Yes |
| Shipping Cost |
200 |
| Shipping Time |
7 to 10 days |
| Unit Type (Selector) |
Standard |
| Warranty |
10 Year Limited Heat Exchange year |
| Water Connection Location |
Top |
| Water Connection Size |
3/4 Inch in |
| Water Pressure Range, Min-Max |
15-150 psig |
| Wattage |
180 W |
What Our Experts Think
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Efficient Heating Power: Delivers 180,000 BTUs, providing a reliable continuous hot water supply for medium to large households.
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Energy-Saving Combination: Features both space heating and domestic hot water in one compact unit, maximizing efficiency.
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Advanced Direct Vent Technology: Dual venting options enhance flexibility and ease of installation.
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Compact Design: Wall-mounted configuration saves space while delivering powerful performance.
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Durability and Reliability: High-quality components ensure long-lasting, low-maintenance operation.
Q&A
Q: What is the Noritz CB180DV Tankless Water Heater?
A: The Noritz CB180DV is a 180,000 BTU natural gas combination tankless water heater and boiler, designed to provide both domestic hot water and space heating.
Q: What is the maximum flow rate?
A: The CB180DV delivers a domestic hot water flow rate of up to 9.2 GPM, suitable for medium to large homes.
Q: What type of heating system is it compatible with?
A: It supports hydronic heating systems, including radiant floor heating and baseboard radiators.
Q: Is the CB180DV energy-efficient?
A: Yes, it boasts a 95% AFUE rating, maximizing energy efficiency and reducing heating costs.
Q: Does it include safety features?
A: Yes, it comes with freeze protection, overheat protection, and built-in temperature sensors for reliable and safe operation.
Q: Is professional installation required?
A: Yes, professional installation ensures proper configuration for both water heating and space heating systems.
Maintenance Tips
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Annual Descaling: Flush the heat exchanger to remove mineral deposits and prevent scale buildup.
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Clean Inlet Water Filter: Inspect and clean the cold-water inlet filter every 6–12 months to ensure proper water flow.
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Ventilation Check: Keep intake and exhaust vents clear of dust and debris for efficient airflow.
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Inspect Gas Connections: Regularly check gas lines for leaks and ensure fittings are secure.
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Monitor Error Codes: Pay attention to error codes and troubleshoot promptly using the user manual.
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Exterior Maintenance: Wipe down the outer casing with a soft, damp cloth to prevent dust accumulation.
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Annual Professional Service: Schedule a certified technician inspection to maintain performance, safety, and efficiency.
