A ceiling ducted heat pump is the most common ducted setup in NZ homes. The air handler sits in the roof cavity, and supply vents in each room's ceiling deliver conditioned air through flexible ductwork. The return air grille, where air is drawn back into the unit, is typically a hinged panel in the hallway ceiling.Because the equipment sits above the living space, NZ roof cavities regularly reach temperatures over 60°C in summer, and the ductwork and joins are exposed to that heat cycle year after year. This is one of the main reasons ceiling ducted systems need periodic professional inspection.