Lower humidity can cause your heating system to work harder in the winter months. There must be a balance of humidity in your home to make it a comfortable place and preserve your interior as well as you heating and air conditioning systems. During summer months, homes should have between 30 and 45 percent humidity. During the winter, humidity levels should be kept between 45 and 55 percent humidity. How can I regulate my home humidity? The following are some ideas on how you can help to balance your home’s humidity: Install an inside weather station that measures humidity in your home.