Cold July mornings can expose every weakness in a home’s heating. A ducted system is not simply a larger heat pump hidden in the roof space. “Christchurch winters make good heating design essential,” said a spokesperson for FAS Energy. “A ducted system needs to be matched to the home, not guessed from a floorplan. About FAS EnergyFAS Energy is a ducted heating specialist in Christchurch designs and installs heating, cooling, and ventilation systems for homes and light-commercial spaces across New Zealand.