Aprilaire 310 Replacement Filter For Aprilaire Whole House Air, Pack Of 2 Are you bothered by the amount of dust and other particles in the air and on the furniture in your home? The AprilAire 310 Healthy Air 11 Filter is the perfect addition to your clean home tool kit. The 310 Filter traps airborne pollen, mold spores, bacteria, pet dander and dust particles as air circulates through the filter ? reducing your cleaning time and frequency, and allowing you to enjoy your clean home even more. Product Features BUY WITH CONFIDENCE This genuine AprilAire 310 replacement air filter was designed and manufactured in the USA by AprilAire ? the leader in indoor air quality solutions ? to optimize the performance of your AprilAire Air Purifier Model: 1310, 2310, 3310, or 4300 VACUUM AND DUST LESS OFTEN by preventing airborne particles from settling on your furniture and flooring. This AprilAire 310 replacement air filter removes airborne particles as they pass through the MERV 11 filter including dust, pollen, mold, spores, bacteria, and pet dander. BETTER PERFORMANCE thanks to the patented AprilAire Self-Seal Technology which minimizes the amount of air bypassing the filter EASY AS 1-2-3 TO INSTALL in the unique AprilAire Interlock Rail System. Unpack. Slide in. Close the door. Done. No assembly or cardboard or metal reinforcements needed. NOMINAL AIR FILTER SIZE of 20 x 20 x 4 inches (nominal size is an industry standard filter size system to help you easily identify the correct replacement filter and is not the actual size) PROUD PARTNER OF THE AMERICAN LUNG ASSOCIATION in support of its mission to save lives by improving lung health and preventing lung disease Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!