COMFORT LIMITS FOR ASYMMETRIC THERMAL-RADIATION

Groups of 32 and 16 subjects of both sexes were exposed in an environmental chamber to radiant asymmetry caused by a cool wall, a warm wall, and a cool ceiling. For cool walls, warm walls, and cool ceilings curves have been established showing the percentage of dissatisfied subjects as a function of the radiant asymmetry. Radiant asymmetry at a warm wall caused less discomfort than at a cool wall. A cool ceiling caused less discomfort than a warm ceiling. A radiant temperature asymmetry of 10 degree C is allowable at a cool wall, 23 degree C at a warm wall, and 14 degree C under a cool ceiling. Radiant asymmetry had no significant impact on the operative temperatures preferred by the subjects.