Indoor air quality is a major concern in today's society. EPA studies shows that air inside your home can be 5X more polluted than air outside your home. Purolator provides quality air filtration products for use in residential heating and air conditioning systems to improve the quality of air you breathe. Purolator air filter products range from the classic fiberglass air filter to the rugged 10-year electrostatic adjustable air filter. Find Purolator products in retail stores, hardware wholesalers, food and drug companies, and more.