Replacement Ac Furnace Air Filters By Nordic Pure, 20X20X5, Merv 12, 2 Pack. Product Details Important Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air filter. It's best if you measure your air filter for the EXACT size and compare it to our "Actual Size". With the 4" and 5" air filters there is a wider variance depending on the manufacturer. Nordic Pure Honeywell Replacement MERV 12 rated air filters are traditional 5? filter at an actual 4 3/8?. You should always measure your current filter or the housing to make sure the actual size correlates with the filter you are ordering. Nordic Pure pleated air filters are manufactured using a heavy-duty, moisture resistant beverage board frame. There is a metal mesh grid bonded to the pleats for extra support. Our AC filter media prevents the growth of bacteria or mold, resulting in a much healthier living environment. MERV 12 furnace air filters are comparable to HVAC filters with the rating of MPR 1500-1900. This high-performance HVAC replacement filter will help keep your air conditioning and heating systems running efficiently, saving money on utilities and costly maintenance. The effective life of your AC air filter depends on both the inside and outside conditions in which you live. It is important to regularly change your furnace air filters especially during any home improvements for fresh, clean air in your home or office. We recommend that you change your air filter every 3-6 months to maintain maximum efficiency and economy. Nominal Size: 20 x 20 x 5 H, Actual Size: 19 5/8 x 19 7/8 x 4 3/8 (19.63 x 19.88 x 4.38) Measure your air filter for the exact size and compare it to our actual size to ensure proper fit. Replaces Honeywell 20x20x4 and filters with an MPR rating with an actual depth of 4 3/8 and ideal for high efficiency air filtration and those with moderate allergies Nordic Pure MERV 12 is equivalent to MPR 1500-1900 Made in the USA Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.