Here are a few tips for easing fall allergy symptoms: Stay indoors with the doors and windows closed when pollen is at its peak (10 am to 3 pm). To keep track of the pollen count in your area, visit the American Academy of Allergy, Asthma, and Immunology web site. Before you turn your heat on for the first time, have your heating ducts cleaned. Particles of mold and other allergens can become trapped in the vents over the summer and will fill the air as soon as you crank up the furnace. Use a high efficiency particulate air (HEPA) filter in your heating system to remove pollen, mold, and other particles from the air. Use a humidifier to keep your air at between 35% and 50% humidity. Wear a mask when you rake leaves, to avoid inhaling mold spores. Take a shower after spending time outside. Don’t hang sheets and clothing outside to dry.