It starts with reading through our short but complete owner’s manual. If you don’t have a copy, you can download the latest version here. Our 3-steps to maximize filter life document, found here is also recommended. The owner's manual will get you familiar with your specific Filtrabox model, filter location and provide instructions on how to check a few things.
What isn’t noted in the owner's manual is that the Filtrabox air-flow range and filter life remaining feature operates on a scale of 1-100%. If your air-flow setting is set to 40% and if you do a filter check test, you’ll get roughly 60% life remaining, even with brand new filters installed. If the air-flow is set to 60%, filter life remaining will be approximately 40%, even with new filters installed.
The filter check feature is very useful in gauging how much life you have remaining in your filters before replacements are required.