About This WHOLE HOUSE REPLACEMENT: 21x21x5 air filters for your furnace, air conditioner, or heat pump enhance HVAC system efficiency and support a healthy lifestyle (actual size: 20.63" x 20.63" x 4.38") MERV 8 PERFORMANCE: Protect your home or business from pollen, lint, mold, and more with MERV 8 synthetic media (comparable with MPR 700 & FPR 5) that captures 90% of dust without restricting air flow LONG-LASTING FILTRATION: Electrostatically charged media (made in the USA) with 8 pleats per foot traps more microscopic particles and lasts 3x longer than fiberglass models (replace every 90 days for optimal performance) SUPERIOR CONSTRUCTION: Easy installation beverage board (recyclable) frames with dual wire backing outperform flimsy cardboard designs by improving durability, preventing warping, and resisting extreme temperatures COMPATIBLE MODELS: Rheem / Ruud Filter Part Number (PD540018), Protech (540012, 540018, PD540012), Housing Part Numbers (RXFH-E21AM10, RXFH-E21AM13) Overview Brand : Filterbuy Material : Aluminum, Plastic, Polypropylene Product Dimensions : 20.63"L x 20.63"W x 4.38"Th MERV Rating : 8 Compatible Devices : Air Cleaner, Air Conditioner, Furnace, HVAC System, Heat Pump EU Spare Part Availability Duration : 90 Days Item Weight : 15 Pounds Max Temperature : 200 Degrees Fahrenheit UPC : 717267215893 Air Filter Construction : Pleated
