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Heat Pumps Guaranteed Solutions
Heat Pumps Guaranteed Solutions 
Reversing valve: An air-to-air heat pump has many components similar to those in an air conditioning 
system. The major difference is that a heat pump includes a reversing valve. 
Difference between demand defrost and timed defrost: Demand defrost occurs only when needed, 
whereas timed defrost operates based on a timer/temperature schedule. 
Outdoor ambient thermostat: This thermostat controls the auxiliary electric heat according to the 
outdoor temperature....