I have a central vacuum in my place and I periodically have to change
the foam air filter because it rots out.
I live in South Florida think it might be the salt air and high
humidity causing the filter to rot out faster than normal.
Today I replace the foam air filter with a K&N High Flow Air Filter.
So far it seems to be working well.
Here are the specifications for those who are interested:
Manufacturer: M & S Systems
Make: AIR VAC
Foam Filter Sizes
Outside Diameter: 5 5/8" (145mm)
Inside (Flange) Diameter: 2" (50mm)
Length: 6 1/4" (160mm)
K&N High Flow Air Filter
Note: I drilled a small hole (15/64" or 1/4") in the rubber end of the
K&N Air Filter to accommodate the bolt which is used to secure the
filter to the central vacuum. I used the round metal plate which
normally holds the foam filter in place to hold the K&N filter in