Aerostar 19 7/8 x 21 1/2 x 1 MERV 11 Pleated Air s (Actual Size: 19 7/8" x 21 1/2" x 3/4") - 6 Pa. MERV 11 s are parable to MPR 1000-1200 and FPR 7. Replaces Bryant/Carrier part # KFAFK0312LRG,Fits Bryant/Carrier/Payne: FV4,FK4,FC4,FB4,FA4,FH4,FA48NF048,FA4ANF042,FA4BNC042,FA4BNC048,FA4BNF042,FA4CNC042,FB4ANF048,FC4BNB054,FC4BNF042,FC4CNF048,FK4CNF003,FK4DNF005,FV4ANF003,FV4ANF005,FV4BNF003,FX4BNF042,FX4CNF042,FX4CNF048,FYANF042. Designed for superior filtrat efficiency,these s are made with electrostatiy chard synthetic material that ds and tures allerns between 0.3 - 1.0 microns,including lint,dust mites,spores,pollen,pet dander,fine dust,and smoke. Aerostar s are a simple and cost effective step towards a healthier home environment,of allerns and particles that can trigr various allergy and asthma symp. They also imp the efficiency of your HVAC unit and therefore maintenance and utility costs,by removing dirt and reducing strain on the motor. For results,chan the every 60 to 90 days but increase frequency to 30 days during peak summer and winter months when your unit is working the hardest. patible with furnaces and AC units. UNIVERSAL : Fits most standard residential and mercial HVAC systems with a standard 1-inch slot. Including Carrier,Bryant,Payne & eywell. Actual size 19.875 x 21.50 x 0.75 parable to MPR 1200 and eywell FPR 7 s. HIGH-EFFICIENCY MERV 11 (MPR 1200 / FPR 7) FILTRAT: Traps up to 95% of particles such as dust,pollen, spores,pet dander,and smoke to imp indoor air quality and allergy trigrs in your home or office. OPTIMIZED AIRFLOW DESIGN: Electrostatiy chard synthetic media tures fine particles without restricting air flow—helping maintain HVAC efficiency and extending system life. DURABLE,PLEATED CONSTRUCT: Sturdy bevera board fre with wire baing resists humidity and temperature chans. The pleated design offers more surface area for lonr-lasting filtrat and fewer replacements. PROUDLY MADE IN THE : Manufactured using high-quality materials in erican facilities to dependable performance,sustainable product,and cleaner indoor air you can trust..