Component for add moisture

Hello I have a question. Which component can add moisture? Because I can`t find it. Should this be done in Honey Bee Tools?
Thanks a lot.

What do you want to do?

I want to make the temperature of a school closer to comfortable condition in summer time by increasing humidity

Do identify the potential of humidity or evaporative cooling methods, you can use the psyhrometric chart. A good explantion is given here:

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