Just as an aside for all H-series uses...
I took down my H100 Push/pull (intake) for a clean the other day and the rad was caked in dust. Ive only had it for 6 months.
Conventional fan filters can be hard to obtain or fit, so I grabbed a pair of my wifes old black stocking
socks and placed those over the intake fans... works a treat. And the temps went down with out all that dust on the rad.
Even now, after a few days, there is a fine covering of dust on the 'filters'.
Pic of my setup prior to popping the stockings over the fans.
I'd really recommend this tip for all H series owners using an intake configuration
If anyone is interested, I can take a pic of the 'filters' in action when I get home tonight.