Heat pumps are critical units in many home’s heating, ventilation, and air-conditioning (HVAC) system. The HVAC units we refer to as heat pumps move temperatures in both direction, providing both heating and cooling capacities. Heat pumps came into wide use in the late 1970s when natural gas shortages caused the price of that fuel to spike according to Mark Huffman, a reporter for Consumer Affairs since 2004. The early heat pumps were highly inefficient. Today, however, heat pumps are efficient and do a much better job and both heating and cooling your home. But, just like any other major appliance, a heat pump will wear out and need replacing.
http://www.advancedapplianceserviceinc.net/info-articles/winston-salem-nc-heating-air-old-heat-pumps-replaced-new/
