| 摘要 |
An air filtration system is disclosed which uses a filter pack 170 which incorporates a dual-layer 190, 198, electret filter having bypass openings 200 in each layer 190, 198, for allowing a small portion of the air flowing through the filter to pass through the filter layer unfiltered. The system allows for the use of a smaller fan motor and a higher throughput of air while maintaining a laminar air flow and low back pressure resulting in an efficient and substantially quieter air filtration unit. <IMAGE> |
