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1255 High and Low Returns - Air Conditioning - Duct System
 
1255 High and Low Returns - Air Conditioning - Duct System -

Image Text: Cross section > Summer (cooling mode) > typical room > return > warm air > upper return grill > return register (closed) > air flow > window > cool air > supply register > supply > Winter (heating mode) > typical room > return > upper return grill blocked by open lower register > air flow > cool air > return register (fully open) > window > hot air > supply register > supply

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AIR CONDITIONING and HEAT PUMPS, Air Conditioning Capacity, Compressor, Condenser Coil (Outdoor Coil), Evaporator Coil (Indoor Coil), Condensate System, Refrigerant, Condenser Fan (Outdoor Fan), Evaporator Fan (Indoor Fan), Duct System, Thermostats, Life Expectancy, Evaporative Coolers, Whole House Fans, Heat Pumps, Heat Pumps in Theory, Heat Pumps in Practice

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