Chiang Mai weather identification affecting acceptable thermal comfort to passive building design


  • ยุทธนา ทองท้วม คณะสถาปัตยกรรมศาสตร์ มหาวิทยาลัยเชียงใหม่


climate, thermal comfort, passive design, Chiang Mai


Weather is a building design index in the choice of passive techniques. This study aims to understand the weather identification, Chiang Mai, which is evaluated by Bioclimatic Chart, the potential of the passive design with acceptable conditions of comfort by using ASHRAE 55 analyze the conditions, building mass and wind speed. The study of weather identification found that most weather patterns are characterized by high temperatures and comfortable relative humidity of 29.50%. In some parts, the temperature is right but very high humidity is 23.97% with a comfortable 21.01%. The study on the potential of passive design, found that during daytime at 10.00-17.00, it was relatively less acceptable due to the influence of air temperature, especially in summer and rainy seasons. In the low mass buildings, the comfort is close to outdoor. In the medium mass buildings, the comfort is due to heat accumulation. In the case of high mass buildings, the ability to retain heat appears much longer than the first two, thus more comfortable.


Boonyatikarn, S. (1999). Technique karn oakbab ban prayad phalangngan phuea khunnaphab chiwit tee dee kwa. (In Thai) [Home energy-saving design techniques to better quality of life]. Bangkok: Chulalongkorn University Press.

Center for the Built Environment. (2017). CBE thermal comfort tool. (In English) [Thermal comfort tool] Retrieved April 13, 2018, from

Chanthima, U., Hengrasmee, S., Chansomsak, S. & Yiemwattana, S. (2017). Karn oakbab phananglae plueak arkan phuea prayad phalangngan samrab arkan anekprasong Mahawitthayalai Naresuan. (In Thai) [Wall and Building envelope design to save energy for Nasesuan University Multipuepose Building]. Journal of Environmental Design, 4 (2), 20-49.

Olgyay, V. (1992). Design with climate: bioclimatic approach to architectural regionalism, New York: Van Nostrand Reinhoold.

The Thai Meteorological Department. (2018, January 10). Hourly recording report. Sub Division of Thai Meteorological Department of Thailand, Chiang Mai.

The Thai Meteorological Department. (2018, January 10). Monthly recording report. Sub Division of Thai Meteorological Department of Thailand, Chiang Mai.

Tongtuam, Y. (2004). Prohgraem kompiwter phuea pramual phon lae pramuen kha datchani karn prayad phalangngan khong arkan nai phumi akat ron chuen. (In Thai) [Computer program to process and evaluate energy conservation index for buildings in a hot-humid climate] (Master’s thesis). Bangkok: Chulalongkorn University.