Home / Questions / Rinnai US has recently developed a new hydronic air handling unit AHU Series 37AHA to hea...
Rinnai US has recently developed a new hydronic air handling unit (AHU Series 37AHA) to heat air in residential buildings. It is expected that hot water from a tank less water heater will be pumped through a finned-tube heating coil installed in the main branch (20 in. × 18 in.) of a ductwork system. A homeowner has calculated that 96000 Btu/h will be needed to heat their home as desired. Air will enter the duct at approximately 70◦F and should leave at 150◦F. Water will enter the coil system at 180◦F. Design the hot water heating coil for this application.
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