Allergy sufferers and asthmatics can thank air conditioning for providing them with clean, filtered air indoors. The first step to help yourself is change the filters on your HVAC system. Regular filter changes can really help reduce the spread of airborne allergens. We recommend changing your 1″ filters monthly and 4″ filters every 4-6 months. If you want more protection, today’s air conditioning systems can be fitted with special allergy filters and UV lights that can actually clean the air in your home helping to reduce allergens.