Evaluation of Thermal Comfort in a Warm-Humid Nigerian City Using a Thermal Index

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Author(s) Adewale Oluseyi Adunola
Pages 126-133
Volume 5
Issue 3
Date March, 2015
Keywords Climatic Context, Effective Temperature, Indoor Comfort, Residential Building, Thermal Index, Warm-Humid.


The general applicability of thermal comfort indices is in contention. It is necessary to determine their relevance to indoor thermal comfort at contextual levels. Indoor thermal comfort is evaluated in this paper in relation to the Effective Temperature (ET) index for Ile-Ife, a city in the warm-humid climatic zone in Nigeria. A purposive sampling was used to select seven residential estates within the city to obtain a regulated sample of similar contemporary buildings. 50 respondents each were randomly selected from the 500 residents in each of the 7 residential estates to assess the indoor thermal environment using a seven-point ASHRAE thermal comfort scale for different periods. The Effective Temperature was calculated for the different periods based on the climatic data for the study area. It was found that there was strong correlation between effective temperature and the thermal response. The comfort zone determined for the study area from this study was from 24.5oC ET to 26.1oC ET. It was concluded that climatic factors played a very significant role in defining the indoor thermal quality of the built environment in the study area. The thermal index of Effective Temperature was found relevant to indoor comfort assessment.

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