Basic Documentation

Room Pressurization Control Application Guide
Table 1. Room Static Pressurization Applications.
Recommended
Static
Pressurization
Level
Application
Inches Pascals
Relationship
to Adjacent
Area(s)
Comments
Hospital - Infectious
Isolation Room
0.01 2.5 Negative
inches w.c. for these rooms; however,
most designs incorporate higher
pressurization levels. The most effective
isolation room arrangement incorporates a
lower pressurized anteroom as a buffer
zone between the isolation room and
corridor.
Hospital Surgical Suite
Delivery
Nursery
Cystoscopy
Trauma
0.01
to
0.02
2.5
to
5
Positive Surgical suites include gowning, hand
washing, etc. All areas of the surgical
suite should be positively pressurized
using dual or multi-staged pressurization
levels to keep the surgical room the most
positive area.
Clean Room:
Pharmaceutical Mfg.
0.05
to
0.10
12.5
to
25
Positive Pharmaceutical processing rooms should
be 0.05 inches positive with respect to
rooms leading into the processing room.
Such rooms should be at least 0.02
inches positive with respect to each other
and non-classified areas.
Clean Room:
Micro-Electronic Mfg.
Data Storage Mfg.
Optics Mfg.
0.05
to
0.20
12.5
to
50
Positive Clean spaces used for highly critical
processes should be at least 0.05
inches positive to any connecting
space and so on. An anteroom having
0.02 inches less positive
pressurization should separate
adjoining spaces that are of the same
classification but used for different
purposes.
10 Siemens Building Technologies, Inc.