John Siegenthaler addressed an overflow audience of contractors from all across the Northeast on the benefits of Noritz America NH Boiler Series, according to Yoshi Asano, Noritz America Senior Marketing Manager. The event, which was held at Noritz's New York branch showroom on November 5, introduced Noritz's ASME certified tankless hydronic boilers,NH-1501-DV and NH-2001-DV, for both residential and commercial use.