Noritz has expanded its line of combination boilers with the new Noritz Residential Combination Boiler (NRCB), which the company says allows for simultaneous residential domestic hot water and space heating and performs at a 95% AFUE.
Its fuel-saving performance allows the NRCB to meet “Energy Star Most Efficient” standards, which represent the U.S. Environmental Protection Agency’s highest efficiency rating. This, combined with an Air-Conditioning, Heating and Refrigeration Institute (AHRI) certification, qualifies for various state energy rebates.
The NRCB is available in two models. The NRCB180DV has a maximum gas input Btuh of 180,000 for hot water and 100,000 Btuh for space heating. Its maximum flow rate is 9.8 gpm. The NRCB199DV has a maximum gas input Btuh of 199,000 for hot water and 120,000 Btuh for space heating. Its maximum flow rate is 11.1 gpm.
On the space heating side, the NRCB has a temperature range of 80°F to 180°F. On the domestic hot water side the range is 90°F to 140°F. According to officials, a flow control valve ensures a consistent temperature for domestic hot water demand regardless of incoming water temperature.