The heat pump is back to stay and this course will explore air source and geothermal heat pumps. This study will include why heat pumps are a good alternative energy source. Students will spend time analyzing control systems, refrigeration components and the air requirements of heat pump systems. Time will be spent investigating how the refrigerant circuit differs from an air conditioner. The student will explore and wire different systems that employ back-up heat systems, dual-fuel systems and off-peak options. The heat pump will be examined from both the installation and service technician's perspective. Due to the importance of energy efficiency, systems will also be analyzed and adjusted to ensure design performance efficiencies. Prerequisites: REFG 101, REFG 102, REFG 121, REFG 123 or equivalents. (F)