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Effect of Courtyard Size on Natural Ventilation in Residential Buildings

Abstract

The study examines the effect of courtyard size on natural ventilation in residential buildings, with emphasis on how variations in courtyard dimensions influence the movement and distribution of air within residential spaces. Courtyards are important architectural features that can support passive ventilation by creating open spaces through which air can circulate and interact with adjoining rooms. Understanding the relationship between courtyard size and ventilation performance is therefore important for improving indoor environmental conditions and reducing dependence on mechanical cooling systems. The study will assess residential buildings with different courtyard sizes and examine selected characteristics such as courtyard area, width, length, proportion, building height, surrounding room arrangement, and openings connecting the courtyard to interior spaces. Natural ventilation performance will be assessed using indicators such as indoor air movement, air temperature, relative humidity, and occupants’ perception of airflow and thermal comfort. Standardized observation, measurement, and assessment procedures will be used to obtain relevant data from the selected residential buildings. A descriptive comparative research design will be adopted for the study. Selected residential buildings will be identified using an appropriate sampling technique based on the availability of courtyard spaces with varying dimensions. Data will be collected through physical measurements, environmental monitoring, photographic documentation, and structured questionnaires where necessary. The collected data will be analyzed using descriptive statistics such as frequency, percentage, mean, and standard deviation, while appropriate comparative or inferential techniques will be applied to examine differences in ventilation conditions associated with courtyard size. The study is expected to reveal variations in natural ventilation performance among residential buildings with different courtyard sizes. Courtyards with dimensions and proportions that provide adequate exposure to external air movement are expected to support improved airflow and more favourable indoor thermal conditions. Smaller, poorly proportioned, or excessively enclosed courtyards may restrict air movement and reduce ventilation effectiveness. However, the observed ventilation conditions may also be influenced by building orientation, window and door openings, surrounding structures, vegetation, prevailing wind conditions, and room arrangement. The findings will be useful to architects, building designers, urban planners, property developers, and other professionals involved in residential building design. The study will provide information on how courtyard dimensions can be considered during the planning and design of residential buildings to support passive ventilation and improve indoor environmental quality. It may also contribute to climate-responsive design approaches that encourage natural airflow and reduce reliance on mechanical ventilation and cooling. The study will conclude by establishing the relationship between courtyard size and natural ventilation performance in residential buildings. It is recommended that courtyard dimensions and proportions should be carefully considered alongside building orientation, opening arrangement, and surrounding spatial conditions during residential design. Further studies involving a wider range of residential building types and climatic conditions are also recommended to provide broader guidance on courtyard-based natural ventilation design.

Keywords: Courtyard size, natural ventilation, residential buildings, courtyard design, airflow, ventilation performance, indoor air movement, thermal comfort, indoor air temperature, relative humidity, passive ventilation, courtyard dimensions, building design, climate-responsive architecture, environmental performance.