The action movie hero is trapped in the building. He dashes out onto the roof, hoping to find a fire escape, but the bad guy is too close behind. The hero hides behind a rooftop HVAC unit. But why is it there? Why do commercial buildings have their HVAC units on their rooftops? It’s not just to make great movie sets. There are good reasons! We’ll explain. If you’d like to know more about rooftop units in Covington, LA, we’d love to chat with you.