Noritz NRCB199DV-NG Condensing Gas Combi Boiler, 199,900 BTU, Natural Gas

A Noritz natural gas condensing combination boiler with a 199,900 BTU/hr maximum input in hot water mode. It runs space heating and domestic hot water at once without temperature drops, making it a single wall-hung replacement for a separate boiler and water heater.

Gas input modulates from 18,000 to 199,900 BTU/hr on a 6.7:1 turndown, with heating mode spanning 18,000 to 120,000 BTU/hr and 95% AFUE. Domestic flow ranges from 0.4 to 11.1 GPM. The primary and secondary hydronic exchangers and the flat-plate domestic exchanger are all 316L stainless steel. Domestic water sets from 90 to 140 F and heating water from 80 to 180 F.

Built-in outdoor reset logic works with the supplied outdoor sensor to adjust loop temperature to the weather, and an automatic water feeder keeps the closed heating loop at operating pressure. The 95 lb indoor unit is direct vent and converts to single vent with kit SV-CK-2. Safety devices include a flame rod, high-limit switch, ZNR lightning protection, freeze prevention and fan rotation detection.

Highlights

• Simultaneous space heating and domestic hot water

• Up to 199,900 BTU/hr in hot water mode; 18,000-120,000 BTU/hr heating

• 95% AFUE with 6.7:1 turndown

• Domestic flow from 0.4 to 11.1 GPM

• 316L stainless primary, secondary and flat-plate exchangers

• Remote thermostat, outdoor sensor, automatic water feeder and 6 ft cord kit included

Specifications

In the box

• Remote thermostat

• Outdoor temperature sensor

• 6 ft power cord installation kit

• Automatic water feeder

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.