When setting up a large desiccant dehumidifier outside a building, what type of pressure is normally created?

When setting up a large desiccant dehumidifier outside a building, neutral pressure is normally created. This type of pressure refers to a balanced state where the ambient air pressure outside is neither significantly higher nor lower than the pressure inside the building.

Desiccant dehumidifiers work by drawing in moist air, passing it over hygroscopic materials that absorb moisture, and then expelling drier air back into the environment. Since the unit is located outside, it is designed to maintain equilibrium with the surrounding atmospheric pressure as it modulates the air exchange. This ensures that the ends of the system do not create significant pressure differentials that could compromise the effectiveness of the drying process inside the building or lead to unwanted air movement.

In contrast to positive or negative pressure scenarios, which can lead to air being forced in or out of the structure, neutral pressure helps maintain a stable environment, allowing for efficient moisture removal without risking structural or air quality issues.