humidity

Is there a way to lower the humidity in my dry room without a dehumidifier?

Air conditioner

besides air conditioner also

...better air exchange will help out alot. Get bigger inline fans...or more.

Yeah, bring in more air that is of a lower humidity and get that air out of there faster.

You can try heating night air(warm air holds more moisture) and then periodically exhaust all warm/moist air out. This will help keep nighttime humidity down