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  2003 Department of Microbiology, University of Hong Kong

Features of the HKURCEID - Air Handling

The air in the facility passes through both pre-filters (Figure 1) and HEPA filters (Figure 2) contained in a filter housing above the work area (Figures 3 and 4).

The pressure differentials in the laboratory are measured using Magnehelic gauges (Figure 5) and the pressure is shown outside the laboratory on a panel (Figure 6).

The HEPA filters are tested at regular intervals (Figures 7 and 8).

The integrity of the whole facility was tested using a pressure decay test (AS/NZS 2243.3: 2002) (Figure 9). The variable speed fans that control the air supply are located in a plant room outside the secure facility. This makes access for servicing straight forward.

Click on the photos to view larger images

Pre Filter HEPA Filter Ladder to HEPA Filter HEPA Filter Canister Magnehelic Gauges
Figure 1
Figure 2
HEPA Filter
Figure 3
Ladder to HEPA filter
Figure 4
Filter Housing
Figure 5
Magnehelic gauges
External Display Panel Testing HEPA filter Testing HEPA Filters Pressure decay Testing  
Figure 6
External Pressure Display Panel
Figure 7
HEPA filter testing
Figure 8
HEPA filter testing
Figure 9
Pressure decay testing


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