frame 28 the heat from frame 28 flows to screen 30 fig7 is a schematic of an embodiment of screen 30 screen 30 includes a mesh formed from a plurality of conducting mediums such as conducting mediums 82 84 86 88 90 and 92 that are made of a metal such as aluminum steel or iron that conducts heat an example of a conducting medium includes a wire screen 30 includes a plurality of openings such as openings 94 96 and 98 formed between a plurality of conducting mediums of screen 30 it should be appreciated that screen 30 may also be considered as a filter for example opening 98 is formed between conducting mediums 82 84 86 and 88 examples of shapes of openings of screen 30 include square rectangular triangular or hexagonal when particles pass through screen 30 the particles are attached or absorbed to a conducting medium of screen 30 each opening of screen 30 is designed so that one of the particles having a maximum dimension such as a maximum length from a plurality of dimensions of the one of the particles is attracted by a conducting medium surrounding the opening as an example a range of the maximum dimension includes a range from and including about 1 micron to about 100 microns as another example the maximum dimension is about 20 microns each conducting medium of screen 30 has the same thickness as another conducting medium of screen 30 in an alternative embodiment a conducting medium of screen 30 has a different thickness than at least one other conducting medium of screen 30 an example of the thickness of a conducting medium includes.