The study looked at how thermal mass and night ventilation can help prevent buildings from getting too hot in cold climates like Beijing, China. Thermal mass stores heat during the day and releases it at night, while night ventilation helps cool the building down. Shading devices also play a role in blocking out the sun's heat. The researchers found that using heavyweight thermal mass can reduce maximum temperatures by up to 20% compared to lightweight materials. This information can help create better building regulations to keep buildings cool without using too much electricity.