3.Your HVAC
A dirty filter on your heating and air conditioning unit can keep air from flowing the way it should and lead to mold growth if it gets damp. Change it at least every 3 months and make sure it fits well. If you have asthma or allergies — or you have pets or a large family — you might want to check it once a month. It’s also a good idea for a professional to inspect the unit once a year.
4.Bathrooms
If there’s mold in your house, the tiny spores can float into your nose and even your lungs. That can lead to allergy symptoms, like coughing or sneezing, or other breathing issues. The fungus loves damp areas, so keep bathrooms dry. Turn on a fan or open a window to help move air after you shower, and hang up wet towels and washcloths. If you see mold in the tub or other areas, you may need to clean more often to help keep it at bay.