Vent Liner / Cover to Improve Dust Problem?

[kage65]

Do vent liners or covers such as this

http://www.natlallergy.com/prod/1140...r-filters.html

help remove dust and improve allergies?

[ComfortService]

They are not pleated so they will not catch at least 70% of the particulate passing through them.

I have seen customers that run them. They have to clean them about every 2 months so im assuming they catch "some" of the particulate in the air over a period of time.

Being highly porous, I don't believe they would raise the static pressure too much as long as they are kept clean.

[mark beiser]

If the air filter setup for the equipment performs so poorly that there is anything for those vent filters to catch, you REALLY need to fix the filter situation on the equipment, and/or the air leaks after the filter that are allowing stuff in.