Examines the difficulties of ensuring occupant comfort in challenging climates and less developed areas of the world such as the Galapagos. Temperatures can reach 30 deg C, but rarely go lower than 18 deg C, so no heating is needed. Describes the offices of the Galapagos National Park Service, built largely with low thermal mass and no insulation. Air conditioning and air movement depend on a filter-down effect from a single office. Occupant behaviour works against air conditioning energy efficiency, since windows are habitually left open and there is no necessity to use well-fitting doors in a climate which doesn't experience cold draughts.