A HVAC Make Up Air System is a type of ventilation system that helps to ensure a balanced air pressure within a building. This system is used to replace air that is lost due to exhaust fans, open doors, and other sources of air loss. It works by introducing fresh air into the building, which helps to maintain the desired temperature and humidity levels. This type of system is especially important in commercial and industrial buildings, where air quality is of the utmost importance. The Make Up Air System helps to ensure that the air inside the building is free of pollutants and allergens, while also helping to maintain a comfortable temperature. Additionally, this system helps to reduce energy costs by providing a more efficient way to heat and cool the building. The Make Up Air System is an essential part of any HVAC system, and it is important to ensure that it is properly installed and maintained in order to maximize its efficiency.