Why Your Upstairs Is Hot Even With Good AC

Send us Fan Mail Is your upstairs always hot even when your AC is running? You're not imagining it — and your AC probably isn't broken. In this video, Crawl Space Ninja founder Michael Church explains the five real reasons your second floor stays hot all summer long, and exactly what to do about each one. We cover attic heat and radiant heat transfer, air sealing and the stack effect, leaky ductwork running through hot attics, poor attic ventilation, and HVAC airflow imbalance in two-story h...