Air-Conditioning Has Absorbed the Asian City's Streets

Air-conditioning accounted for roughly 30 percent of Hong Kong's total electricity consumption in 2023, according to the city's Electrical and Mechanical Services Department. That single figure frames the core argument of an ArchDaily essay on how mechanical cooling has evolved from a room-scale technology into urban infrastructure — and how it now organizes the Asian city around escape from its own climate.

The essay, part of ArchDaily's monthly topic "The Lure of Escapism in Architecture and Alternative Worlds," describes a condition familiar to residents of Hong Kong: a commuter can leave an apartment tower, cross a podium mall, enter the Mass Transit Railway system, and arrive at another commercial complex through enclosed footbridges or underground passages while encountering remarkably little of the atmosphere outside. Heat, humidity, rain, and seasonal variation remain present, but a continuous network of conditioned interiors can bypass them.

The mall as circulation infrastructure

The contemporary Asian mega-mall differs sharply from the suburban shopping centre surrounded by parking. In Hong Kong, the mall functions as circulation infrastructure: one passes through it to reach a railway station, moves vertically through the city, collects groceries, eats, meets friends, and eventually reaches a residential or office tower above. What is technically a commercial interior performs many of the functions traditionally associated with streets and squares.

The Railway plus Property model has institutionalized this relationship between transport and development, producing districts where movement through the city is inseparable from movement through privately managed interiors.

Elsewhere in the region, the networks have become explicit planning tools. Singapore's Urban Redevelopment Authority supports covered, elevated, and underground pedestrian connections between developments and rapid-transit stations. In Bangkok, One Bangkok combines shaded outdoor routes with enclosed air-conditioned spaces as parallel responses to pedestrian comfort.

The essay refuses to dismiss these systems. They move dense populations efficiently, concentrate daily activity around public transport, and provide relief from climatic extremes. Their success lies precisely in their usefulness — the mall has not withdrawn from the city so much as absorbed substantial parts of it.

The scale of the heat

The environmental cost is measurable. By a rough order-of-magnitude exercise depending on assumptions about system efficiency and how electricity is ultimately dissipated, Hong Kong's cooling consumption can be thought of as producing a comparable quantity of waste heat over time. Averaged across the year, the essay estimates, that approaches the output of nearly 800,000 two-kilowatt electric heaters running continuously.

The architectural consequences extend beyond energy. As more daily activities migrate into conditioned interiors, investment follows them. The mall becomes cleaner, cooler, and more densely programmed, while the exterior street registers as the uncomfortable interval between controlled environments. The less comfortable that interval feels by comparison, the more attractive the interior becomes. Climatic escape reinforces the conditions that make further escape desirable.

This alters expectations across generations. For those who knew tropical Asian cities before widespread air-conditioning, entering a cooled interior was a conscious form of relief — one knew exactly what was being escaped. For younger generations, the conditioned environment forms the ordinary background of urban life. Moving from an air-conditioned home through a lift lobby, podium, railway, and into another mall "no longer necessarily feels like retreating from the city. It simply feels like the city." At their most extreme, mega-developments resemble urban-scale refrigerators, maintaining preferred atmospheric conditions while weather and season continue beyond their envelopes.

The middle territory

The essay's authors reject nostalgia for a city before mechanical cooling, noting that in increasingly hot and humid cities air-conditioning is essential to health. Singapore offers the counterpoint: alongside its underground and elevated networks, planning guidelines continue to require open-sided covered walkways, sheltered public routes, landscaping, and at-grade connections that protect without fully enclosing pedestrians.

Between the sealed mall and the exposed street lies a broad architectural territory — shaded public rooms, open-sided arcades, breezeways, semi-conditioned thresholds, and spaces that change with the weather. The objective, the essay argues, is not to remove air-conditioning but to prevent mechanical conditioning from becoming the only imaginable definition of comfort. As cities face hotter temperatures and greater climatic uncertainty, the question is less how successfully Asian cities can escape their climates than how architecture can allow people to remain within them — because if architecture makes it possible to live without encountering the climate, it may eventually become possible to forget how to design for it.