The NCC1991 condensing tankless water heater from Noritz America delivers a thermal efficiency of 95%, using natural gas, with an input range of 16,000 to 199,900 Btu. The company says this enables the unit to meet the hot water needs of larger residential applications as well as a wide variety of commercial projects. The NCC1991 is the low NOx version of Noritz’s NCC199 condensing tankless unit.
When campers arrive for the first time next summer at Camp Southern Ground there will be plenty of hot water thanks to a donation of a commercial-grade Rinnai Tankless Rack System (TRS) with three tankless water heaters.
During the first two days of May 2010, a nearly 14-in. downpour fell on “Music City USA” and the Cumberland River burst its banks, causing the worst flood in Nashville’s history. Among the many businesses that suffered terrible losses during the flood was Schermerhorn Symphony Center, completed just four years earlier and home of the Nashville Symphony.
A series of successful installations has made construction manager Cliff Holden a big believer in tankless water heating systems for the school-building projects he oversees. Since 2007, the 15-unit Burleson (Texas) Independent School District (BISD) has erected six new educational facilities under Holden’s direction, and the latest three have all featured multiple-unit, tankless solutions — in no small part because he wholeheartedly championed the idea.
Leaning on experience and data from various K-12 cities and projects, the author pursues some less conventional design approaches. They may revolve around radiant heating and/or cooling, but depending on school size and other factors, the smart use of heat recovery, DOAS, and improved central plants could also put a project on the HVAC honor roll.