quote:
Originally posted by TheLoneRanger:
I now place my filter stock in a plastic bag (grocery store type), and tie the top. This keeps them in an (almost) airtight environment, free of excess humidity and dust. I have used them 1-2 years later, and they still look like new.
I have also simply placed boxed filters on the garage shelf, and noticed that they tended to rust on the mounting base after a time.
Keep them in an airtight container and in a cool place, and they should be good for several years.