The Noritz Residential Combination Boiler allows for simultaneous residential domestic hot water and space heating. The unit’s simultaneous capabilities are easy to control and especially beneficial for applications that do not efficiently store or deliver heat energy, Noritz states. Performing at a 95% AFUE, the unit is EPA Energy Star-certified. Its primary and secondary heat exchangers have high corrosion resistance, and the unit can adjust to either PP or CPVC venting without the installer needing to make any programming changes. The venting also can easily be reconfigured to use room air.