Fast Shipping High Quality Best Pricing Johnsburg, Illinois Best Price Dri-Eaz Defend Air / HEPA 500 replacement filter (F321) Single Unit REPLACMENT HEPA FILTER FOR DEFENDAIR 500 MODEL #F284 HEPA filter (F321). The HEPA filter has an efficiency rating of 99.97% against 0.3 micron oily aerosol particles. The HEPA filtration standard was developed in the 1940s to control radioactive dust particles in U.S. nuclear laboratories. HEPA 500 filters combine filtration ability with filter capacity. To maximize HEPA filter life, be sure to change the prefilters regularly. All returns are subject to prior written approval by and are at the sole discretion of AmeriTemp Group. All return material requests must include one of the following: the original contract number or invoice number, the AmeriTemp Group sales order number. Return goods criteria are primarily based on the resale potential of the product as well as handling and repackaging costs. Standard items carry a restocking charge {25%}. Returns are only accepted 30 days from original purchase date. Non-stock items are normally not returnable. If the product manufacturer agrees to take the product return from AmeriTemp Group the return will be subject to the terms and conditions of that manufacturer. AmeriTemp Group will always attempt to represent the customers and manufacturer’s interests in an effort to pass these costs on to the responsible party. All returned material must be in NEW condition, in ORIGINAL packaging and is subject to quality control inspection prior to acceptance. All transportation costs to effect returns will be borne by the party requesting the return. Any damage occurring in transit is between the carrier and the party requesting the return. AmeriTemp Group will assist in the resolution of such claims if requested to do so by the requesting party. ??????? Returns ??????? Payment ??????? Shipping We accept payment by any of the following methods: We offer FREE shipping on all standard orders! (lower 48 states) Your order will be dispatched within 1 working day of receiving payment (Monday-Friday). All orders are shipped UPS Ground unless otherwise specified. In the very unlikely event that your item is lost or damaged during shipment, then WE are responsible and will issue either a full refund or replacement. ??????? The Ameritemp Equipment Services, Inc. offers the most complete and in-depth HVAC Mechanical services in the industry. Since 1995, Ameritemp has been devoted to providing excellence in customer service 24/7 365 days of the year. Our capabilities include sales, service, installation and Preventative Maintenance which makes Ameritemp your one-stop shop for all your Mechanical HVAC services. We have trained professionals ready to assist you to get the job done right “the first time” on time and on budget. Ameritemp Ltd. Rental division offers solutions for your Portable Air Conditioning Chillers, Temporary Heating, Dehumidifying and Generator Light Tower along with Power Distribution needs. Ameritemp also sells equipment through our website store, Amazon E Bay. With over four acres of all types of equipment, we are sure to have what it takes to fulfill our customers obligations. Prior to delivery to your job site or facility, our equipment goes through rigorous testing to ensure its reliability and quality that our customers deserve. Satisfaction is what built our reputation, determination is what keeps us growing! REPLACMENT HEPA FILTER FOR DEFENDAIR 500 MODEL #F284 HEPA filter (F321). The HEPA filter has an efficiency rating of 99.97% against 0.3 micron oily aerosol particles. The HEPA filtration standard was developed in the 1940s to control radioactive dust particles in U.S. nuclear laboratories. HEPA 500 filters combine filtration ability with filter capacity. To maximize HEPA filter life, be sure to change the prefilters regularly. Fast Shipping High Quality Best Pricing Johnsburg, Illinois Best Price Dri-Eaz Defend Air / HEPA 500 replacement filter (F321) Single Unit REPLACMENT HEPA FILTER FOR DEFENDAIR 500 MODEL #F284 HEPA filter (F321). The HEPA filter has an efficiency rating of 99.97% against 0.3 micron oily aerosol particles. The HEPA filtration standard was developed in the 1940s to control radioactive dust particles in U.S. nuclear laboratories. HEPA 500 filters combine filtration ability with filter capacity. To maximize HEPA filter life, be sure to change the prefilters regularly. We accept payment by any of the following methods: ??????? Payment ??????? Shipping We offer FREE shipping on all standard orders! (lower 48 states) Your order will be dispatched within 1 working day of receiving payment (Monday-Friday). All orders are shipped UPS Ground unless otherwise specified. In the very unlikely event that your item is lost or damaged during shipment, then WE are responsible and will issue either a full refund or replacement. Returns All returns are subject to prior written approval by and are at the sole discretion of AmeriTemp Group. All return material requests must include one of the following: the original contract number or invoice number, the AmeriTemp Group sales order number. Return goods criteria are primarily based on the resale potential of the product as well as handling and repackaging costs. Standard items carry a restocking charge {25%}. Returns are only accepted 30 days from original purchase date. Non-stock items are normally not returnable. If the product manufacturer agrees to take the product return from AmeriTemp Group the return will be subject to the terms and conditions of that manufacturer. AmeriTemp Group will always attempt to represent the customers and manufacturer’s interests in an effort to pass these costs on to the responsible party. All returned material must be in NEW condition, in ORIGINAL packaging and is subject to quality control inspection prior to acceptance. All transportation costs to effect returns will be borne by the party requesting the return. Any damage occurring in transit is between the carrier and the party requesting the return. AmeriTemp Group will assist in the resolution of such claims if requested to do so by the requesting party. ??????? ??????? The Ameritemp Equipment Services, Inc. offers the most complete and in-depth HVAC Mechanical services in the industry. Since 1995, Ameritemp has been devoted to providing excellence in customer service 24/7 365 days of the year. Our capabilities include sales, service, installation and Preventative Maintenance which makes Ameritemp your one-stop shop for all your Mechanical HVAC services. We have trained professionals ready to assist you to get the job done right “the first time” on time and on budget. Ameritemp Ltd. Rental division offers solutions for your Portable Air Conditioning Chillers, Temporary Heating, Dehumidifying and Generator Light Tower along with Power Distribution needs. Ameritemp also sells equipment through our website store, Amazon E Bay. With over four acres of all types of equipment, we are sure to have what it takes to fulfill our customers obligations. Prior to delivery to your job site or facility, our equipment goes through rigorous testing to ensure its reliability and quality that our customers deserve. Satisfaction is what built our reputation, determination is what keeps us growing! REPLACMENT HEPA FILTER FOR DEFENDAIR 500 MODEL #F284 HEPA filter (F321). The HEPA filter has an efficiency rating of 99.97% against 0.3 micron oily aerosol particles. The HEPA filtration standard was developed in the 1940s to control radioactive dust particles in U.S. nuclear laboratories. HEPA 500 filters combine filtration ability with filter capacity. To maximize HEPA filter life, be sure to change the prefilters regularly.