Replacing Your Mini Split's Filter Is a Must in Mini split warehouse.

Knowing When and How to Change the Air Filter. The general rule of thumb is to check the filter once a month and change it at least every three months. This applies to basic fiberglass air filters. Electrostatic or HEPA filters typically last two to four months. Call us 877-770-3548. http://0s4.com/r/WKMGFB