Noritz NRCB180DV-NG Condensing Gas Combi Boiler, 180,000 BTU, Natural Gas

A Noritz residential condensing combination boiler for natural gas that provides space heating and domestic hot water simultaneously from one wall-mounted cabinet. Input modulates from 18,000 to 180,000 BTU/h, and since both loads are served together, hot water use does not cause a drop in room temperature.

The primary and secondary heat exchangers are 316L stainless steel for corrosion resistance and longevity, and the flat-plate domestic exchanger is stainless too. The modulating burner reaches 14 ppm NOx, well below the 20 ppm South Coast Air Quality Management District limit. Heating mode spans 18,000 to 100,000 BTU/h with a 5.6 turndown, domestic flow is 0.4 to 9.8 GPM, and AFUE is 95%.

Install it indoors only; it can be converted to single vent with kit SV-CK-2. The included remote thermostat adjusts domestic water from 90 to 140 F and heating water from 80 to 180 F, with an outdoor temperature sensor and 6 ft power cord kit also supplied. An internal pump handles the primary loop, and protections cover flame sensing, high limit, ZNR lightning surge, freezing and fan rotation.

Highlights

• Simultaneous space heating and domestic hot water

• Input 18,000 to 180,000 BTU/h; 95% AFUE; 5.6 turndown

• Domestic flow from 0.4 to 9.8 GPM

• 316L stainless primary and secondary heat exchangers

• 14 ppm NOx, under the 20 ppm SCAQMD limit

• Remote thermostat, outdoor sensor and 6 ft power cord kit included

Specifications

In the box

• Remote thermostat

• Outdoor temperature sensor

• 6 ft power cord installation kit

Good to know

• Gas-fired appliance: it must be installed, vented and commissioned by a qualified installer in line with local codes and the manufacturer's installation manual.