Singapore is testing alternative cooling systems across public and private buildings to curb high energy consumption and carbon emissions as rising temperatures increase cooling demands nationwide.
Singapore Tests Active Chilled Beams and Passive Cooling to Curb High Energy Use
Approximately 99 percent of private residences in the city-state are equipped with cooling units as Singapore maintains the highest per-capita air conditioner ownership rate in Southeast Asia. Daytime temperatures routinely hover between 31C and 33C year-round, driving heavy reliance on mechanical cooling as shoppers encounter blasts of cool air spilling onto thoroughfares like Orchard Road when doors open.
The local building sector accounts for one-fifth of the nation’s emissions, with cooling operations consuming 40 to 60 percent of a building’s total energy. Traditional systems rely on vapor compression and refrigerants, while their outdoor compressor units discharge heat directly into the environment.
Paya Lebar Green and Tuas Harbor Pilot Alternative Technologies
The eight-story Paya Lebar Green building in eastern Singapore utilizes active chilled beams, which are perforated ceiling-mounted panels equipped with cooling coils. A top-floor chiller plant cools water to 9C and pumps it through the coils, while internal nozzles blast air to create a low-pressure zone that draws and cools warm room air before recirculating it.
Renuga Shekar, a 30-year-old HR professional who moved into the office space last November, noted they initially mistook the exposed ceiling pipes and panels for a warehouse kind of look.
Workers inside the building experienced the system without friction. We didn’t really think much about it. No one really commented about it,
she said.
We didn’t even realise how different the air cooling system is because it was very seamless, and in terms of the temperature, ideal for everybody in the office.
Renuga Shekar, HR professional
The active chilled beam setup cut energy use by more than 30 percent compared to conventional air conditioning, according to the building’s designers, DP Architects. Meanwhile, the ports authority maintenance building at Tuas harbor in western Singapore employs passive displacement cooling, using ceiling coils to chill air that sinks and naturally rises back as it warms, minimizing reliance on mechanical fans.
Government Targets and Economic Pressure Shape Future Cooling Strategies
A 2024 government study identified these systems as a key strategy capable of saving the city up to 48 percent in energy. Building authorities reported that at least 33 public and 14 private buildings had adopted alternative cooling technologies by mid-2026, supporting Singapore’s goal of achieving net-zero carbon emissions by 2050.
One study estimates that heat could cost Singapore S$2.22 billion a year in economic output by 2035.
Alternative systems carry higher installation costs than conventional units, and public acceptance remains a challenge. The most popular alternative method remains hybrid cooling, which pairs fans with air conditioning set to higher temperatures between 25.5C and 27C.
Everybody’s more used to having air-conditioned office spaces, so for them to suddenly accept 26 degrees, I think the mindset shift has not reached a threshold where it’s generally accepted yet.
Chua Zi Jun, director at DP Architects
The technologies are a step in the right direction and should eventually incorporate more sophisticated controls, including predictive systems that adjust temperatures before rooms become too hot or cold,
said Wan Man Pun, a cooling technology expert at Nanyang Technological University. However, Wan added that researchers still haven’t found any alternative cooling methods that have a higher coefficient of performance, or efficiency, than vapour compression.