At a price of just $79, you can breathe easy. Better Homes & Gardens / Francesca Fasciglione Airborne contaminants can be a year-round nuisance for allergy sufferers. Dog and cat hair and the associated dander and dust particles can stack up in the corners of your home and pollute your indoor air quality. Then comes shedding and pollen season, leaving your sinuses no relief in sight. That is,...