Figure:25 TAC §131.148(b)

TABLE 2
FILTER EFFICIENCIES FOR CENTRAL
VENTILATION AND AIR CONDITIONING SYSTEMS
Area Designation Number of Filter Beds Filter Bed No. 1 (Percent, MERV*) Filter Bed No. 2 (Percent, MERV*)
General procedure patient care areas, treatment, diagnostic, imaging, and those areas providing direct service or clean supplies such as sterile and clean processing, and related areas. 2 30, 8 90, 14
Laboratories 1 80, 13 ----
Administrative, bulk storage, soiled holding areas, and laundries

1 30, 8 ----

* MERV Minimum efficiency rating value (American Society of Heating Refrigeration and Air-Conditioning Engineers (ASHRAE) Standard 52.2, 1999 edition.

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 ASHRAE Standard 52.1, 1992 edition.