A: if you don't open the package and you keep it in a cool dry place (I think that's the ideal condition?)
B:Already opened and in the housing but not being used
If anyone can give me some ideas that would be great. I think prefilters will last about 6 months?
B:Already opened and in the housing but not being used
If anyone can give me some ideas that would be great. I think prefilters will last about 6 months?