When entering a building, have you ever been met with a sudden blast of air as you mightily pull the door open? How about the reverse when air is being intensely sucked in and the door promptly closes faster than you can walk in? If you’ve experienced these symptoms before and wondered if that was normal, the answer is a resounding No. Often misunderstood, building pressure imbalance is caused by disproportionate amounts of outside air coming into the building versus going out. In this video, we’ll discuss the energy penalty associated with building pressure imbalance and recognizing the symptoms. As a bonus, we’ll also follow a building engineer on a service call as he troubleshoots and corrects a building pressure imbalance.