Depends on how often the desiccant needs to be replaced and its cost. If it's once a year and costs as much as the filters do, and saves 20% power, then it's a

Depends on how often the desiccant needs to be replaced and its cost. If it's once a year and costs as much as the filters do, and saves 20% power, then it's a no-brainer. If it's once a month and cost 1k each, saves 5% energy, then it's pointless. We don't know the numbers, so can't say for sure.