Blue 42" x 23" . Proper HVAC maintenance can extend the life of your unit, reduce energy costs, improve air quality in your home and keep your system functioning optimally. It's a worthwhile choice for furnaces as well as central air units, especially those with hard-to-find and specialty filter sizes. The material is virtually effortless to cut with heavy shears or a razor knife so that you can create the dimensions to suit your specific needs, then just slide it into place.
