The use of proportion varies in daylighting and natural ventilation strategies because they have different objectives and considerations.
In daylighting strategies, the proportion of glazing or openings is important to allow enough natural light to enter the building without causing glare or excessive heat gain or loss. The size and placement of windows, skylights, or other transparent surfaces should be carefully proportioned to control the amount and distribution of daylight. The angle and orientation of the building and shading devices also affect the proportion of light that enters the space. The goal is to optimize the daylighting performance while minimizing the energy consumption for artificial lighting and cooling or heating.
In natural ventilation strategies, the proportion of openings or ventilation devices is crucial to ensure adequate air exchange and thermal comfort. The size, location, and shape of openings, vents, or ducts determine how much fresh air penetrates the building and how effectively it circulates to reduce indoor pollutants or excess humidity. The proportion of openings also affects the natural stack or wind-driven ventilation potential, which depends on the difference in pressure and temperature between the indoor and outdoor environments. The goal is to optimize the natural ventilation performance while minimizing the reliance on mechanical systems for air conditioning or air purification.
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