Noritz NRCB199DV-LP Condensing Gas Combi Boiler, 199,000 BTU, Propane

A Noritz wall-mounted residential condensing combination boiler for liquid propane that delivers domestic hot water and space heating at the same time. With input from 18,000 to 199,000 BTU/h and flow up to 11.1 GPM, it replaces a separate water heater and boiler in one compact cabinet.

Condensing combustion reaches 95% AFUE with a 6.7 turndown ratio, and the heat exchangers use 316L stainless steel for corrosion resistance and long life. Temperature control comes from a remote thermostat plus outdoor reset using an outdoor temperature sensor, and the temperature range is 90 to 140 F. An automatic water feeder tops up the hydronic loop to hold system pressure.

Protection includes flame sensing, overheat prevention, a safety lock-out, adjustment for high elevation, ZNR lightning protection and freeze protection down to 39 F, inside a steel casing with polyester coating. The cabinet measures 18.5 in. wide, 12.8 in. deep and 27 in. high, weighs 95 lb, and runs on 120 V at 0.3 A. It is for indoor installation only and converts to single vent with a kit.

Highlights

• Simultaneous domestic hot water and space heating

• 18,000 to 199,000 BTU/h input; 95% AFUE; 6.7 turndown

• Domestic flow from 0.4 to 11.1 GPM

• 316L stainless steel heat exchangers

• Remote thermostat and outdoor reset with outdoor sensor

• Automatic water feeder; freeze protection down to 39 F

Specifications

In the box

• Remote thermostat

• Outdoor temperature sensor

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.