A central heating and air conditioning system features heating and cooling systems that supply conditioned air from a central location. Split systems use two units: indoor and outdoor units. Indoor units, often air handlers or furnaces, and outdoor units, the outdoor condenser. Central HVAC methods typically rely on a duct system to heat or cool a home or building. However, they can also refer to ductless systems, like a ductless mini split air conditioner or ductless mini split heat pump. MRCOOL's ProDirect series utilizes a central split system design that relies on ductwork to circulate conditioned air. For more information about central split system HVAC systems, check out our blog Split System vs. Package Air Conditioning Units.