| 摘要 |
A high efficiency ventilation system for removing contaminants from an area. The system includes a fan unit and filter unit. The filter unit has two filters, a prefilter and a HEPA filter, each of which has its static pressure monitored by a separate gauge. The static pressure of the fan used in the fan unit is monitored by a third gauge. Thus, it is possible to determine which of two filters needs replacement and troubleshooting can be performed much faster and more efficiently.
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