Split-system central air conditioners and heat pumps

Split-system central air conditioner, a single-phase or three-phase central air conditioner that is a split-system and that has a cooling capacity of less than 19 kW (65,000 Btu/h). 
 Split-system heat pump, a single-phase or three-phase air-to-air heat pump that is a centrally ducted split-system and that has a cooling or heating capacity of less than 19 kW (65,000 Btu/h).

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