2003 Volume 32 Issue 2 Pages 107-110
Thermally comfortable zones in Vietnamese were investigated during winter in Hanoi. The subjects were 21 males (age: 19.7 ± 0.4 yrs; height: 165 ± 1.5 cm; body mass: 55.1 ± 1.1 kg) and 19 females (age: 19.7 ± 0.4 yrs; height; 155.6 1.7 cm; body mass: 45.6 ± 1.3 kg). Each participant entered singly the climatic chamber controlled at 22 °c and 40%RH. After 20 min rest, the participant was requested to indicate on a 7-point scale (Table 1) how he or she felt to the room temperature given. Then, the room temperature increased by 1 °c over 10 min every 20 min. Just before the rise of the room temperature, the participant judged his or her thermal sensation. More than 90% of the participants felt 24-29 °c of the room temperature as "slightly cool", "neutral" and "slightly warm" (Table 2). We defined these sensations as "thermally comfort". These thermally comfortable zones were quite higher than those (20-24 °c) recommended by ISO-7730 (1994). We discussed these discrepancies in terms of higher establishment of thermoregulatory set-point in the Vietnamese.
