Figure: 25 TAC 134.131(d)

TABLE (4)

FILTER EFFICIENCIES FOR CENTRAL VENTILATION AND AIR CONDITIONING SYSTEMS

Area Designation

Number of Filter Beds

Filter Efficiencies (%)

 

 

Filter Bed
No. 1

Filter Bed
No. 2

Patient care and treatment, diagnostic and related areas

2

25

90

Laboratories and sterile storage

1

80

 

Administrative, bulk storage, soiled holding areas, food preparation areas, and laundries

1

30

 

NOTES: Additional roughing or prefilters should be considered to reduce maintenance required for filters with efficiency higher than 75%. The filtration efficiency ratings are based on American Society of Heating Refrigeration and Air-conditioning Engineers, Standard 52-92, 1992 edition.