Should be nice.....build on

What are those Filters? I have fine Screens but like this idea of filters.
I have to clean my screens once a week, how often would you need to change your filters?
Will filters in place what Temps to have and with no filters in place what are your Temps with the same Fan and Pump settings?
Would get a +1 From me if you had a MODS RIGS.

The filters restricted the airflow when I just put them in front of the stock fans. There was not enough room between the filter and the front door of the case which has sound deadening bitumen. You could hear the fans laboring earlier during a stress test run. After I cut the hole in the floor, the rad sits further back.  In a pull config, the fans are further back from the front of the case. Currently, my iphone sound meter says 35 dB at 1 meter from the side vent with the case on my desk.
 
Temps are 70 degress with intel burn test. 4.6 ghz 1.38v.
 
In terms of cleaning-I dont. I just buy a new air filter from home depot (the ones for whole house air conditioners 25x22in) strip off the metal screen and cut to size. My last pc would turn those gray in 6 months. The inside of a 6 year old Q6600 is still pristine.
 
The case itself has a lot of features that I have no use for-I think I would have been equally well off getting an Arc midi2 and adding sound deadenin material. The chimney on my case remains closed-the exhaust only warms up after a few hours of gaming. I think the big fan in the bottom really helps out keeping temps down.
 
I thought this was a mods rigs post? How do I 'get a mods rigs'?