I’m reconfiguring my printing closet (~6’x6’) for a new printer and thought about enclosing the printer in a moderate sized cabinet (~2’x3’x6’ - one “shelf” of the closet) for thermal control. Since there will be inevitable opening and closing, as well as just normal infiltration of the ambient air (usu ~65F between 40-75% RH) it would seem like a good application for a Peltier dehumidifier to keep the RH in the chamber low and reduce my need to re-dry filament which has been on the machine during (inevitable) multi-day or -week downtime between projects.
In Florida, I run a dehumidifier in my garage, and it pulls a couple gallons a day. It’ll get uncomfortably dry, if you let it. It’ll keep the relative humidity down around 25%, according to its display.
I’ve used those pellets before too. They get used up almost immediately, even in a vacuum sealed bag.
I have a smaller dehumidifier in my bedroom. I think it cost me around 30 bucks and it also keeps things super dry. Once I have a relatively sealed space for my filament I’ll probably put one in there too.