Assessing Thermal Performance in Two Classroom Building Types in Warm Humid Climate Imo State, Nigeria

  • Charles Munonye Chukwuemeka Odumegwu Ojukwu University, Uli Campus, Nigeria
  • Kelechi Ezeji Chukwuemeka Odumegwu Ojukwu University
  • Chukwunonso Umeora Chukwuemeka Odumegwu Ojukwu University
  • Chijioke Onwuzuligbo Chukwuemeka Odumegwu Ojukwu University
Keywords: Building envelope, classroom type, enclosed wall, short wall, thermal comfort, thermal performance


Achieving energy efficiency in educational buildings in countries located in the tropical regions is a big challenge because of very high temperatures and humidity. The problem is further complicated by designs that encourage the use of mechanical ventilating systems to provide  thermal comfort. This paper presents the report of fieldwork carried out in primary schools in  Imo State, Nigeria. It involved two naturally ventilated classroom building types categorized  as short wall and enclosed wall classrooms. The aim was to determine and compare their  thermal performance so as to provide information for use in design of sustainable school  buildings in warm and humid environments like Nigeria. The data (environmental parameters  and physical measurements) of these classrooms were collected during the rainy season and  dry season. Results of the correlation analysis of the retrieved data showed that the two  classroom types were in thermal compliance with the requirements of ASHRAE Standard 55.  However, the relationship between the outdoor temperature and the indoor temperature in the  short wall classroom-type was stronger (r2= .856), than the relationship found in the enclosed  wall classroom-type (r2= .722). Furthermore, the prevailing daily mean indoor temperatures  were higher in the enclosed wall classroom type. The difference in thermal performance in  these two building-types is likely as a result of the difference in their building envelopes. It was  concluded that the short wall classroom-type has a greater potential to contribute to reduced  energy use in buildings. It was recommended that the short wall concept in the design of  classroom blocks be adopted in the warm and humid climate, in Nigeria.

How to Cite
Munonye, C., Ezeji, K., Umeora, C., & Onwuzuligbo, C. (2021). Assessing Thermal Performance in Two Classroom Building Types in Warm Humid Climate Imo State, Nigeria. Coou African Journal of Environmental Research, 3(1), 78-94. Retrieved from