The NRCB is the first and only combination boiler on the market that can simultaneously provide domestic and space heating for residential applications. These simultaneous capabilities are easy to control and especially beneficial for applications that do not store or deliver heat energy efficiently. A user can, for example, take a shower without worrying about experiencing a corresponding drop in room temperature.
Another industry first is the NRCB's use of 316L: Stainless steel primary and secondary heat exchangers, which have higher corrosion resistance than traditional heat exchangers for increased durability and lifespan. A third flat plate heat exchanger for domestic water heating is also made of: Stainless steel.
It also far exceeds the toughest emissions standards. The unit's fully modulating burner has a nitrogen-oxide emissions level of only 14 parts per million (ppm), far below the South Coast Air Quality Management District requirement of 20 ppm.
Standard Input- Gas consumption ranges: NRCB199: 18,000 BTUh to 199,900 BTUh
Heating Mode Input- Gas consumption ranges: NRCB199 : 18,000 BTUh to 120,000 BTUh
Turndown Ratio- 6.7 (NRCB199)
Capacity Range- Flow rates of 0.4 GPM up to 11.1GPM (NRCB199)
Compact Design- ANSI Z21.13/CSA 4.9 certified design that can be wall-mounted
Durable Steel Casing with Polyester Coating
Heat Exchanger- Manufactured with 316L: Stainless steel
Venting Options- For indoor installation only. Convertible to Single Vent (-SV) with
the use of conversion kit (#SV-CK-2)
Direct Electronic Ignition
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: 80°F to 180°F
Outdoor Reset Control- Built-in customizable programming for Energy Savings and
Comfort with Outdoor Temperature Sensor (included)
Power Cord Installation Kit- 6' power cord is included
Safety Devices- Flame Rod, High Limit Switch, Lightning Protection Device (ZNR),
Freezing Prevention Device, Fan Rotation Detector
Internal Pump- Heating Mode: used for primary closed loop. Domestic Mode: used
for pre-heating of internal plate heat exchanger
Energy Guide (NRCB199DV - LP)