Thanks for the Spell Check. Secondly i also agree regarding that fine dust particles might pass this filter, but i got this idea from my old Corolla 2001 Model 1.6 GLi SE. It also have the same type of filter and till now i have never got any kind of service done, only one or two times just have filled some gas, changed the AC Filter and just cleaned the Aluminum Gauze Filter with water.
Lastly the gauze i have used is very very thin and it wont be easy for the dust to pass it soo much easily. I have used three layers of this gauze each in different direction which making a very tight matrix (a grid) for dust to cross soo easily and i am very very very much satisfied with the change in AC Performance that i got after doing all this.
Its very simple that i have got my car cabin heating coil closed. Its very simple what point you didn't got in that.