Since They may be smaller sized, they also don’t have to have a pump for computerized drainage. As for other desiccant dehumidifiers, they don't need a reservoir tank or drain hose for that gathered moisture. Even so, industrial desiccant styles do have to be ducted outdoors or by various rooms https://dstdehumidifiers.co.uk/case-studies/desiccant-dehumidifiers-in-cold-stores/