*Money Saving 3-Pack* When you order this product, you will save $4.50 off of the normal retail filter price. You will receive 3 genuine Carrier high quality replacement air filters. The replacement air filter has a rigid cardboard frame with a MERV 8 rating at 2.5 meters per second. To maintain optimum efficiency, the filters should be inspected quarterly and replaced at least every 12 months. The filters may require more frequent replacement if the filter appears dirty to the point of blocking air flow through the heating/cooling equipment. When replacing the filter be sure to pay attention to the air flow arrows and indicators on the filter. This high quality filter is manufactured by Carrier. Save $4.50 when you order this 3-Pack.