OK, Montana used to use an inner and an outter filter on the compacts. Every machine had both but about 2 years ago when we started to PDI some machines we found only the outter filter. I contacted Montana and asked where the other filter was and was told that LG/LS had sent out a memo that an inner was no not necessary. They never had a problem and removing the inner gave better performance with .
I have this product notice here in front of me.
The product notice I got on this was dated May 22nd 2006 and for all the previous models incl, 2740, 3040, 3840, 4540,4340 and 4340C ,4940 and 4940C and 5740 and 5740C.
I think although we now have the new models like the 4344 etc. that the bulleting is still applicable. I will check and let you all know but I am 99.5% confident no inner air filter anymore.
Maka