One of the prime markets for both air-to-water and geothermal water-to-water heat pumps is as a retrofit heat source to an existing hydronic system. Those systems often have heat emitters such as fin-tube baseboards or cast-iron radiators that were sized to operate at relatively high water temperatures such as 160-200 ºF. While such water temperatures are typically beyond the range of most current-generation hydronic heat pumps, there are ways to reduce those temperature requirements so that a heat pump can be successfully used as the system’s primary heat source. The February Modern Hydronics & Heat Pumps webinar will describe how water temperatures can be reduced through both building load reduction and modifying the existing hydronic distribution system.

Learning Objectives:
• Be able to calculate the effect of load reduction on supply water temperature requirements
• Understand how outdoor reset control can keep heat pumps operating at their maximum efficiency.
• Learn simplified ways to add heat emitters to an existing system.