The Filterbuy replacement air filter 20x24x4 (actual measurements: 19.38″ x 23.38″ x 3.63″) 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 residential or commercial settings due to its capability to trap 90% of airborne particles， protecting your home or business from debris， lint， pollen， mold， dander， and other forms of dust without impacting air flow. Our electrostatically charged design features 12 pleats per foot that increases surface area to capture more harmful particles and prolong the filter’s lifespan. Industrial-grade beverage board frames paired with dual wire backings outperform standard cardboard designs by improving structural integrity with their ability to endure heat up to 200° F while also withstanding exposure to moisture. Plus， installation is 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. Filterbuy: Breathe Freely!

• 20x24x4 air filters for your furnace， air conditioner， heat pump， or HVAC system
• Actual size (exact dimensions): 19.38 x 23.38 x 3.63 inches (4-Pack)
• MERV 8 electrostatic media (MPR 600， FPR 5) protects against 90% of particles
• Pleated design traps more airborne particles and lasts 3x longer than fiberglass
• All industrial-grade components are made in the USA and designed to be recycled