Researchers discover roofing materials that radiate heat into space and offer natural cooling for homes, providing a sustainable alternative to air conditioning.
Researchers from McGill University, UCLA and Princeton have found in a new study the use of roof materials that radiate heat into the cold universe, even under direct sunlight, and how to combine them with temperature-driven ventilation could cool a home. The need for cool living environments is becoming more urgent. But air conditioning is a major contributor to global warming since units use potent greenhouse gases and lots of energy.
Remy Fortin, lead author and PhD candidate at the Peter Guo-hua Fu School of Architecture said, “We found we could maintain air temperatures several degrees below the prevailing ambient temperature, and several degrees more below a reference ‘gold standard’ for passive cooling. We did this without sacrificing healthy ventilation air changes.” This was a considerable challenge, considering air exchanges are a source of heating when the aim is to keep a room cooler than the exterior.
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