When a desiccant dehumidifier is drawing outside air, it can create __________ pressure in the building.

When a desiccant dehumidifier draws outside air into a building, it can create positive pressure. This occurs because the dehumidifier introduces air that has been conditioned and dried, leading to an increase in air pressure relative to the outside environment.

Positive pressure is important in certain drying scenarios as it helps to prevent the infiltration of moist outside air. Maintaining positive pressure can also help in controlling air quality inside the building and reduce the risk of further moisture damage from external sources.

In contrast, achieving negative pressure would mean that the inside air is being exhausted and more air is being pulled in from outside, which can introduce moisture and compromise the drying process. Neutral pressure would indicate that the air pressure inside the building is equal to that outside, which is not typically the situation created by a desiccant dehumidifier, as it actively moves and conditions the air. Lastly, static pressure relates to the pressure exerted by the air in a non-moving state, which is different from the dynamic effect caused by the dehumidifier in this context. Thus, the creation of positive pressure is aligned with the function of a desiccant dehumidifier when operating under the conditions described.