During the 1940s, the heat pump was popular due to its superior efficiency. The pumps efficiency was still useful in the 1970s when the Arab oil embargo sparked conservation awareness and made energy conservation intriguing even though the energy prices were cheap.
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When did residential heat pumps come out?
In fact, the fan blew so well it heated his entire home. In 1948, Robert C. Webber created the first electric heat pump by reusing the wasted boiling water from a deep cold freezer. The following year, Robert replaced the coal furnace in his home, and decades later heat pumps are found in most HVAC units in Tennessee.