Researchers at Loughborough University have identified blackout canopies as an effective method for reducing indoor temperatures during heatwaves. Through controlled testing, the team found that homes equipped with large black Dutch canopies installed outside windows experienced significant cooling effects compared to unshaded dwellings.
In recent experiments conducted during a heatwave, temperatures inside an unscreened test house exceeded 33 degrees Celsius (91 degrees Fahrenheit). Meanwhile, a neighboring identical home fitted with these blackout canopies maintained indoor temperatures around 29 degrees Celsius (84 degrees Fahrenheit), demonstrating a reduction of more than 4 degrees Celsius.
The findings suggest that external window shading could offer a practical and energy-efficient alternative to air conditioning systems, which are commonly used to manage heat but are often associated with high electricity consumption. Dr. Ben Roberts, an expert in indoor environments and building performance at Loughborough University, emphasized the importance of exploring passive cooling strategies. “We’re looking at how we can adapt our homes to stay cooler in hot weather, without relying on air conditioning,” he said.
By limiting the amount of solar radiation entering living spaces, blackout canopies reduce the heat load indoors and potentially contribute to lower energy use during periods of extreme temperature. As heatwaves become more frequent and intense in various regions, these findings could inform building design and renovation practices aimed at improving occupant comfort while reducing environmental impact.
Homeowners and building professionals are encouraged to consider the installation of external shading devices such as blackout canopies to enhance indoor thermal comfort. Further research may also explore the long-term benefits, cost-effectiveness, and adaptability of such solutions across different climatic conditions.