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HUMIDITY CONTROL


The challenge of industrial humidity


Simon Marshall of Humidity Solutions asks why industrial warehouses or facilities suff er from humidity and how it is controlled.


Simon Marshall


The production area of an industrial plant facility. A


pplications such as large warehouses, food production and packaging facilities are notorious for humidity issues. These types of open spaces often contain


multiple areas that have diff erent humidity loads. As a solution, most warehouses use a standard industrial humidity control system to provide uniform control in the space. However, this may not be the best solution, as a one-


size-fi ts-all installation is unable to meet the varying demands, resulting in increased energy bills and reduced product quality. One way to counteract this is known as ‘humidity zoning’. In


Diagram showing the diff erent zones of a printing facility. 24 March 2025 • www.acr-news.com


large industrial applications, separate areas of buildings often serve diff erent purposes. For example, production, packaging, and storage areas may require diff erent humidity levels to keep processes operating smoothly. By using humidity zoning, areas that have diff erent requirements can be adjusted, giving facility managers accurate control over the environment. Many factors can aff ect the internal climate of large facilities, like equipment, air temperature, multiple entry points, ventilation systems, and external air humidity levels. So how do we control this? First, we need to look at the space to identify the problem zones and to illustrate; we will be using a printing warehouse as an example with two distinct areas: ■The printing zone ■A storage zone We can see from the fl oorplan, that the printing zone needs a higher level of humidity in comparison to the storage area. Other factors aff ecting the humidity include printing machinery releasing excess steam into the air and the doorway allowing outside air to fl ow inside. Why do we need to consider the air from outside? During winter, the air temperature can often be much lower, with


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