19 7/8 x 21 1/2 x 1 Carrier Replacement Filter by Aerostar - MERV 8 Box of 6 Replaces Bryant/Carrier part # KFAFK0312LRG 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 Pleated MERV 8 Media Comparable to MPR 600 and FPR 5Designed for Superior Filtration Efficiency Made with electrostatically charged synthetic material that draws and captures allergens between 3 - 10 microns including lint dust mites mold spores pollen pet dander and dust Improve Efficiency and Reduce Cost An Aerostar furnace air filter helps keep your HVAC unit working efficiently by removing dirt and reducing strain on the motor When your unit runs properly it consumes less energy requires less maintenance and will have a longer life These factors will have an impact on your utility bill and maintenance costs It is recommended that you change the filter every 60 to 90 days during normal times of year but increase frequency to 30 days during peak summer and winter months when your unit is working the hardest About Aerostar Furnace Air Filters Aerostar filters are manufactured in the USA by Filtration Group a world-leading manufacturer and supplier of filtration solutions for residential commercial and industrial applications The Aerostar brand is known for constantly innovating and improving their technology to help make filtration more efficient effective every day What's in the Box of six Aerostar MERV 8 Pleated Furnace Air Filters MERV 8 filters are comparable to MPR 600 and FPR 5 ratings