I use one of these in my extraction room, it pulls a lot of water from the air (at least 10l per day in my room) wich helps prevent honey adsorbing moisture from the air when extracting.
https://www.meacodehumidifiers.co.u... Litres - FREE 3 Year Warranty *5060216550114
It also has the bonus of throwing out a lot of heat, so heats and drys my extraction room.
My moisture contents were on average about 2% lower this year after using the dehumidifier. So I will keep using when extracting and see how it goes.
I planned to use a big box with dehumidifier and fan if I had any honey that was too moist, but all was ok this year.