The main reason for having a big, feck-off dehumidifier is that my airguns are kept in my workshop and that I have a lot of expensive tooling in there. All my guns are stored in soft cases and each case also has large silica bags in as well. With the dehumidifier set to 70% I doubt if it runs for more than a couple of hours a day and I replace and dry the bags each month plus use Ballistol on most surfaces when required. Having 2 big freezers in the workshop doesn't help matters either.