An evaporative cooler arrangement (80). The arrangement (80) includes a fan module (30) and an evaporator module (60). The fan module (30) is mountable substantially to or adjacent an outer roof surface (82) of a building. The fan module (30) has at least one air outlet (46). The evaporator module (60) is mountable within a roof space of the building. The evaporator module (60) has at least one air inlet (66). The at least one air outlet (66) of the fan module (60) is in fluid communication with the at least one inlet (46) of the evaporator module (30).
