This monograph presents the findings ofASHRAE research project RP-702; a field investigation of indoor climates and occupant comfort in 12 air-conditioned office buildings in Townsville, located in Australia's tropical north. The project replicates an earlier ASHRAE investigation in San Francisco (RP-462), with the primary aim being to examine the effects of a hot-humid climatic context on human thermal response to the indoor climates of air-conditioned buildings.