Subjects were exposed to three room air temperatures, nominally 20, 23 and 26 1C, at 0.6m height and three vertical air temperature gradients, nominally 1, 3 and 5 K/m, between 0.1 and 1.1m heights. During the experiment, air velocity in the space near the subjects was kept at below 0.2 m/s. RH at 0.6m height and outdoor air provision were maintained at 50% and 10 l/s/p, respectively.