In 2023, Princeton researchers tested radiative cooling with natural ventilation and thermal mass, keeping a building 3.9°C below outdoor air

• Image AI generatedIn 2023, researchers tested whether a building could be cooler than the air outside while still relying on natural ventilation.
• The experiment used two insulated boxes in California to study how radiative cooling, thermal mass and temperature-driven airflow could work together without fans or mechanical systems.
• The test box had an uninsulated aluminium roof covered with a radiative cooling material.