Yes, air purifiers can help with cat litter dust. In fact, they can be very effective at reducing the amount of dust in the air and making your home more comfortable for everyone. There are a few things to keep in mind when using an air purifier for this purpose, though. First, make sure that the unit is powerful enough to handle the amount of dust in your home. Second, change the filter regularly to ensure that it continues to work effectively. Finally, consider using an air purifier with a HEPA filter. These filters are designed to capture small particles like dust, pollen, and dander, making them ideal for homes with pets or allergies.