Figure: 25 TAC §133.169(d)

TABLE 4
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*)
Orthopedic and organ transplant
operating rooms		 2 25, 7 99.97, 17
Protective environment rooms 2 25, 7 99.97, 17
IV preparation and chemo-hood
rooms		 2 25, 7 99.97, 17
General procedure operating rooms,
delivery rooms, nurseries, critical
care units, patient care areas and
treatment, diagnostic and related
areas		 2 25, 7 90, 14
Laboratories and sterile storage 1 80, 13 ----
Administrative, bulk storage, soiled
holding areas, food preparation areas,
and laundries		 1 30, 7 ----

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

NOTES: