Humidity control for dry room

I got a humidistat and a thermostat for my dry room. I have a heater, ac, and dehumidifier, I’m wondering what’s the best option for adding humidity to the room. I’ve been recommended a Swamp cooler But I’m worried about it affecting temperature too much. Is a humidifier a better choice? Can someone recommend one for a 11x7 room? Thanks in advance

I accually just read something about a bowl of water with a wash cloth on brim half in half out can add humidity to the tent but I am really new to this whole thing I’m on my first harvest myself so hopefully a get can help ya out more good luck

O didn’t see the size of room was hat might not help sorry

Soak a few blankets and leave them to dry in the room (with a fan on the blankets, not the plants). That'll do the trick.

If you've got a lot of product though and don't fancy winging it then you might as well chip in for a humidifier that you can just set and forget (apart from filling it with water every few hours!)