What is Makeup Air, and Why Is It Important?

All sealed indoor buildings create an air pressure imbalance. From the smallest household kitchen to the largest industrial warehouse, the indoor air pressure tends to be lower than the outside. This is usually caused by household appliances that push or pull air, or it can be due to the building’s layout. 

Whatever the case, the net effect is that outside air tends to get sucked into the building, which can result in detrimental effects for occupants and the building structure alike. This is where makeup air comes in.