DIY Homemade Fan Filter Machine using USD 6 in 5 Minutes
The above figure shows the state of the filter after six 6 days of use compared to the new unused filter. Imagine all these dust in your lungs.
Filter To Be Used In An Enclosed Air Conditioned Room
I have done some research.
There is a 3M Filtrete Four pieces of 19cm x 30cm: At RM53 or about USD12; can be fitted to a table fan. Two pieces are needed at RM28 OR USD 6. 3M Filtrete filters come in various sizes.
For reviews on the 3M Filtrete, visit:
http://www.amazon.com/Filtrete-Conditioner-15-Inch-24-Inch-9808-12/dp/B000BO96IW
This idea is very similar to this NUS idea that was featured in the Star in 2014.
http://www.thestar.com.my/News/Regional/2014/05/27/New-way-to-beat-the-haze-Researchers-create-fan-filter-that-reduces-toxic-particles-in-air/
Try it.

Cut the Filtrate filter into in a RECTANGULAR shape to be fitted into the fan’s metal casing. The white colour stripes are the double-sided tapes. The filter appearing on top on the left is the one after 7 days’ used.

Re-attached the metal casing with the Filtrate inside. There should be ‘over-lapping’ parts at the edge of the metal casing as indicated to help you fasten the filter properly.

This is how the filter look like after 3 days’ of use. Notice the parts by the side and in the middle are of lighter colour.

The result (on top) after 7 days as compared to the fresh one below. The Filtrete filter on the right, I bought them from HomePro while I was in Bangkok.
Note: I will not recommend to fit it to the air conditioners. It did not work too well for mine.
love your website.