It depends on the level of humidity control you need.
- If you live in a northern climate and have forced-air heat, you probably don't need to run it year around.
- If you live in a southern climate with the air conditioner running continuously, you probably don't need a dehumidifier at all.
- If you have a damp cellar or basement--or an area of the house where you want little or no humidity--you may have to run the unit year around.
