Gazing at the Skyline of History: Contemplating the Crown of Old Buildings - 'Taizi Lou'

Taizi Lou is a classical yet efficient architectural ventilation design. Architecturally, it refers to an additional, independent mini double- or four-sided open-windowed small building (ventilation louvre) added to the top of the original roof. Its structure essentially utilizes the principles of 'chimney effect' and 'thermal convection' in physics to achieve excellent natural heat dissipation and ventilation effects. It is commonly found in traditional tin factories, Japanese architecture, and tobacco barns (also known as Yue Wuyun). 📌 Core Operating Principles • Heat Rises: Indoor air expands when heated, becoming less dense and naturally gathering at the top of the roof. • Negative Pressure Exhaust: The louvres or vents of the Taizi Lou at the top allow rising hot air to be quickly expelled outwards. • Cold Air Replacement: As hot air is expelled from the lower part of the interior, negative pressure is created, guiding cooler outdoor air from lower areas to flow in through the windows. ❓ Why are tobacco barns in Taiwan called Taizi Lou? Actually, before the tobacco barns, traditional architecture in Taiwan already had the term Taizi Lou, usually referring to the tallest building in a group of buildings or the second floor of the main building. The origin of the name Taizi Lou is difficult to ascertain, but it might be because the main building was considered the 'emperor' of the building complex, and the higher yet smaller structure above it was likened to a 'prince' (Taizi).