The only way dust will not collect on these fins is if there is negative air pressure. The shape of these fins is wrong for that. They would need to be more a traditional "tear drop" air foil design and even then there would be some dust gathering. What they are doing here seems cool but if they are truly using "dead air" then this will suck as a cooler as the heat will not dissipate until the molecules gain enough movement to expand out past the positive pressure. Basically this thing will get SUPER HOT before passive air cools it......slightly in the dead space within the cooler.