When a large desiccant dehumidifier draws in outside air and ducts it into a building, what is created?

When a large desiccant dehumidifier draws in outside air and ducts it into a building, positive pressure is created. This occurs because the dehumidifier is actively introducing air into the space, which increases the overall air volume inside the building. As this additional air is introduced, it pushes against and increases the pressure within the interior environment compared to the outside air pressure.

Creating positive pressure is beneficial in drying operations as it helps to prevent outside air—which may be humid or contaminated—from entering the structure. By maintaining positive pressure, the controlled conditions inside help optimize the drying process and enhance the removal of moisture from materials and the atmosphere within the space. This is especially crucial in water damage restoration, where maintaining a dry environment aids in faster and more effective drying outcomes.