Delaware Heat Wave: Garage Door Cooling Myth?

Delaware is currently grappling with a severe heat wave, the most prolonged and intense since 2011. As temperatures soar, residents are advised to take precautions like staying indoors and utilizing air conditioning. However, rising electricity costs have led many to explore alternative cooling strategies, such as partially opening garage doors.

Experts suggest this tactic may provide marginal benefits for cooling a garage space, particularly if air conditioning is unavailable. The strategy primarily improves ventilation when outdoor temperatures are lower. Conversely, for homes with functioning air conditioning, leaving a garage door open can be counterproductive.

This practice can allow hot air to infiltrate the home, forcing HVAC systems to work harder to maintain a cool interior. Additionally, prolonged periods with an open garage door increase the risk of pests and unwanted wildlife entering the premises, especially if food or trash is present.