To keep humidity levels in your home year-round at ideal levels system addons such as whole-home humidifiers and dehumidifiers are recommended. These systems work with your home's heating and cooling systems to add or remove moisture from the air. Utilize a humidifier in winter months when air is drier, and a dehumidifier in the summer when air has more moisture. Majority of all forced air heating systems should have a humidifier for humidity control.