Residents in Australian apartments are experiencing significant overheating, with indoor temperatures recently exceeding 40 degrees Celsius in some properties. Llewellyn McGarry and her mother Marie reported such conditions in their Canberra apartment, which was purchased for its energy efficiency and accessibility.
A lack of adequate cooling mechanisms contrasts with the apartments' performance in winter, where double-glazed windows effectively retained warmth.
Apartment Overheating Study
Experts indicate that addressing living conditions for apartment dwellers is critical as climate change leads to hotter summers and more frequent heatwaves. Researchers are conducting the largest study of its kind in Australia, tracking indoor temperatures, air quality, and the use of windows and air conditioning in 450 apartments across Sydney, Melbourne, and Queensland over two years.
During a recent heatwave, a survey conducted by senior research scientist Pippa Soccio revealed that 25 percent of participants found their apartments warm or too hot. The primary issue identified was a lack of air movement.
Design Challenges and Glazing Issues
Other factors contributing to uncomfortable indoor temperatures included insufficient shading and ineffective or unused air conditioning systems. Building scientist Peter Lyons explained that large glazed areas, especially those facing west without adequate shading, absorb substantial solar heat, becoming a liability in summer despite potential winter benefits.
Many apartment designs prioritize extensive glass for light and views, which can inadvertently increase radiant heat and raise indoor temperatures, according to Dr. Lyons. Dr. Soccio suggested glazing should frame a view rather than encompass the entire view.
Resident Solutions and Impacts
Ms. McGarry installed programmed internal blinds and reflective accordion-style blinds in an attempt to mitigate the heat. While these measures provided some improvement, her apartment still reached 30 degrees Celsius. Her energy bills increased to $300 per month, which she described as a medical necessity due to a disability affecting her temperature regulation.
The experiences of residents highlight concerns regarding future apartment developments featuring extensive glass facades.