Animal allergens, however, are nearly impossible to capture with a conventional vacuum. Conventional vacuums do pick up small irritants, but they blow them through the exhaust outlet right back into the air. Several companies make vacuum cleaners that are designed for allergy sufferers machines with ultra-fine filtration capacities that will contain even the smallest microscopic particles. You may also be able to turn your conventional vacuum cleaner into a cleaner air machine by using special disposable electrostatic bags. These are available for many upright and canister model vacuums.
Proper ventilation can also help to lower the concentration of pet allergens.
Poor air distribution throughout the home is a major factor contributing to the buildup of indoor airborne allergens, pet or musty odors, mildew, and the resulting health problems. EPA studies indicate that indoor air is often more polluted than outdoor air. The fine dust from traditional coarse-grained clay cat litter can aggravate allergies. Unscented litter is, by and large, less irritating than brands with strongly scented perfumes, deodorizers or other additives. Try various brands to find the one that produces the least dust.