Specification AirFilterConstruction : Pleated Brand : Filterbuy BulletPoint1 : 21x21x5 replacement whole house air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 20.63" x 20.63" x 4.38") BulletPoint2 : MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from mold, pollen, and more while trapping 90% of dust particles without impacting air flow BulletPoint3 : High quality construction (made in the USA) features an electrostatically charged design with 8 pleats per foot that captures more harmful particles and lasts 3x longer than fiberglass models (replace every 90 days for best performance) BulletPoint4 : Easy installation beverage board (recyclable) frames with dual wire backings improve structural integrity and outperform standard cardboard designs by resisting extreme temperatures BulletPoint5 : Compatible Models: Rheem / Ruud Filter Part Number (PD540018), Protech (540012, 540018, PD540012), Housing Part Numbers (RXFH-E21AM10, RXFH-E21AM13) BulletPoint6 : (Depending on the model of the vent or usage conditions, the sign may not appear.) Color : Silver CommonApplications1 : Allergen Reduction CommonApplications2 : High Strength CompatibleDevices : Furnace CompatibleDevices1 : Air Conditioner CompatibleDevices2 : Furnace CompatibleDevices3 : Heat Pump CompatibleDevices4 : Air Cleaner CompatibleDevices5 : HVAC System CustomerPackageType : Standard Packaging ExternallyAssignedProductIdentifier : 4901987254201 ExternallyAssignedProductIdentifier1 : 717267213738 ExternallyAssignedProductIdentifier2 : 0717267213738 ExternallyAssignedProductIdentifier3 : 0354123765095 ExternallyAssignedProductIdentifier4 : 0696731964027 GpsrSafetyAttestation : 1 IncludedComponents : Air Filters ItemDisplayWeight : 7.5 pounds ItemName : Filterbuy 21x21x5 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement for Rheem, Ruud, and Protech (Actual Size: 20.63 x 20.63 x 4.38 Inches) ItemPackageDimensions_Height : 10 inches ItemPackageDimensions_Length : 21 inches ItemPackageDimensions_Width : 21 inches ItemPackageQuantity : 1 ItemTypeKeyword : replacement-household-furnace-filters Manufacturer : Filterbuy Material : Polyester Material1 : Plastic Material2 : Aluminum Material3 : Polypropylene MinimumEfficiencyReportingValue : 8 ModelName : RRF21x21x5M8pk2 ModelNumber : RRF21x21x5M8pk2 NumberOfItems : 1 PackageLevel : case PartNumber : RRF21x21x5M8pk2 Pattern : Electrostatic ProductDescription : The Filterbuy replacement whole house air filter 21x21x5 (actual size: 20.63" x 20.63" x 4.38") ensures that your furnace, air conditioner, heat pump, or HVAC system is circulating the cleanest air possible to help preserve your budget and healthy lifestyle. MERV 8 synthetic media (comparable with Clean Living Dust Defense MPR 600 & FPR 5) is recommended in most scenarios with its capability to trap 90% of dust particles while protecting your home or business from lint, pollen, mold, dander, and other forms of debris without impacting air flow. High quality construction features an electrostatically charged design with 8 pleats per foot that captures more harmful particles and prolongs the products lifespan by three times that of fiberglass models (replace every 90 days for best results). Plus, our industrial grade beverage board frames are paired with dual wire backings that significantly outperform traditional cardboard compositions by improving structural integrity with their ability to endure temperatures up to 200 degrees Fahrenheit and withstand exposure to moisture. Installation is also made simple with the addition of easy-to-understand arrows that help identify the direction of air flow and subsequently the way the filter needs to be placed. To top it off, all our components are 100% manufactured within the United States and designed with recyclable materials, providing an eco-friendly alternative to enhancing your air quality. ProductGrade : Replacement Parts ProductSiteLaunchDate : 2019-04-21T07:00:00.000Z RegulatoryComplianceCertification : R37912 Size : 20.6" x 20.6" x 4.4" Style : 21x21x5 SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 2 UnspscCode : 40161505 WarrantyDescription : Defective items and products that were shipped incorrectly are subject to a refund or replacement on a case by case basis. Please contact our customer support team for more information if you experience any issues. WebsiteShippingWeight : 7.5 pounds