Space for mounting (the dream!), From the air circulating with these 4 fans. One feels good that he has been thinking when designing. The build quality is good, the paint is superb. But alas, a star or two less for quality control had a weakness, the front filter is non-existent, it was forgotten during installation! It's like having a bagless vacuum cleaner, hello dust into the housing. In short, I feel the galley which begins: how to recover a filter before this case in California? Meanwhile, I'll put a kitchen host filter piece to the fan before! This is not top, but we have to filter dust!