Sizing a split system
A split system's capacity is measured in kilowatts. The right size depends on the room's floor area, ceiling height, insulation, windows and which way it faces: a west-facing living room with big windows needs more than a shaded bedroom of the same size. We size each room on site rather than from a chart, because an undersized unit struggles on hot days and an oversized one cycles on and off and wastes power.





