ASHRAE Journal - March 2009 - 30

Air Motion Control By Gerald Cook, Member ASHRAE; and Dan Int-Hout, Fellow ASHRAE In the Hospital Operating Room A source of contamination bypasses HEPA installations with every surgical procedure performed in the operating room (OR). That source of contamination is the surgical staff themselves, and the previously settled particles stirred up by their movement. Since a HEPA filter cannot control this source, and bioaerosols given off by the surgical staff are exuded continually during the procedure, we must turn to air motion control to maximize air asepsis. The operating room environment is unique in that the procedures performed within its walls literally carry the effects of that environment into the patient’s body. Since air touches every 30 ASHRAE Journal that, in turn, contact the patient, or are not carried directly into the wound. Although air motion control is only one factor involved in controlling infection rates in the OR, controlling air motion is well within our grasp and should be considered in every design. In hospital ORs, using HEPA-filtered air and downward, unidirectional, lowinduction airflow (vertical laminar flow) are nearly de fa cto standards. However, many HVAC designers are unaware that these two methods alone may not adAbout the Authors Gerald Cook is engineering manager and Dan Int-Hout is chief engineer at Krueger in Richardson, Texas. surface in the space, failure to maintain air asepsis risks exposing the patient to post-operative infection. Proper air motion control helps ensure that contaminated particles are not carried to objects ashrae.org March 2009

ASHRAE Journal - March 2009

Table of Contents for the Digital Edition of ASHRAE Journal - March 2009

Contents
Commentary
Industry News
Letters
Meetings and Shows
Special Section
    2009 ASHRAE Technology Awards
Feature Articles
    Heat Recovery for Office Tower
   Air Motion Control in the Hospital Operating Room
   Anniversary Feature: Five Defrost Methods for Commercial Refrigeration
   Groundwater Issues: Commercial Open Loop Heat Pump Systems
   Used Filters and Indoor Air Quality
Building Sciences
Emerging Technologies
Washington Report
Products
Special Products
People
Classified Advertising
Advertising Index
ASHRAE Journal - March 2009 - Cover1
ASHRAE Journal - March 2009 - Cover2
ASHRAE Journal - March 2009 - 1
ASHRAE Journal - March 2009 - 2
ASHRAE Journal - March 2009 - Contents
ASHRAE Journal - March 2009 - 4
ASHRAE Journal - March 2009 - Commentary
ASHRAE Journal - March 2009 - Industry News
ASHRAE Journal - March 2009 - 7
ASHRAE Journal - March 2009 - 8
ASHRAE Journal - March 2009 - 9
ASHRAE Journal - March 2009 - Letters
ASHRAE Journal - March 2009 - 11
ASHRAE Journal - March 2009 - 12
ASHRAE Journal - March 2009 - 13
ASHRAE Journal - March 2009 - Meetings and Shows
ASHRAE Journal - March 2009 - 15
ASHRAE Journal - March 2009 -     2009 ASHRAE Technology Awards
ASHRAE Journal - March 2009 - 17
ASHRAE Journal - March 2009 - 18
ASHRAE Journal - March 2009 - 19
ASHRAE Journal - March 2009 - 20
ASHRAE Journal - March 2009 - 21
ASHRAE Journal - March 2009 -     Heat Recovery for Office Tower
ASHRAE Journal - March 2009 - 23
ASHRAE Journal - March 2009 - 24
ASHRAE Journal - March 2009 - 25
ASHRAE Journal - March 2009 - 26
ASHRAE Journal - March 2009 - 27
ASHRAE Journal - March 2009 - 28
ASHRAE Journal - March 2009 - 29
ASHRAE Journal - March 2009 -    Air Motion Control in the Hospital Operating Room
ASHRAE Journal - March 2009 - 31
ASHRAE Journal - March 2009 - 32
ASHRAE Journal - March 2009 - 32A
ASHRAE Journal - March 2009 - 32B
ASHRAE Journal - March 2009 - 32C
ASHRAE Journal - March 2009 - 32D
ASHRAE Journal - March 2009 - 32E
ASHRAE Journal - March 2009 - 32F
ASHRAE Journal - March 2009 - 33
ASHRAE Journal - March 2009 - 34
ASHRAE Journal - March 2009 - 35
ASHRAE Journal - March 2009 - 36
ASHRAE Journal - March 2009 - 37
ASHRAE Journal - March 2009 -    Anniversary Feature: Five Defrost Methods for Commercial Refrigeration
ASHRAE Journal - March 2009 - 39
ASHRAE Journal - March 2009 - 40
ASHRAE Journal - March 2009 - 41
ASHRAE Journal - March 2009 - 42
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ASHRAE Journal - March 2009 - 49
ASHRAE Journal - March 2009 - 49A
ASHRAE Journal - March 2009 - 49B
ASHRAE Journal - March 2009 - 50
ASHRAE Journal - March 2009 - 51
ASHRAE Journal - March 2009 -    Groundwater Issues: Commercial Open Loop Heat Pump Systems
ASHRAE Journal - March 2009 - 53
ASHRAE Journal - March 2009 - 54
ASHRAE Journal - March 2009 - 55
ASHRAE Journal - March 2009 - 56
ASHRAE Journal - March 2009 - 57
ASHRAE Journal - March 2009 - 58
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ASHRAE Journal - March 2009 - 60
ASHRAE Journal - March 2009 - 61
ASHRAE Journal - March 2009 - 62
ASHRAE Journal - March 2009 - 63
ASHRAE Journal - March 2009 -    Used Filters and Indoor Air Quality
ASHRAE Journal - March 2009 - 65
ASHRAE Journal - March 2009 - 66
ASHRAE Journal - March 2009 - 67
ASHRAE Journal - March 2009 - 68
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ASHRAE Journal - March 2009 - 70
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ASHRAE Journal - March 2009 - 73
ASHRAE Journal - March 2009 - 74
ASHRAE Journal - March 2009 - Building Sciences
ASHRAE Journal - March 2009 - 76
ASHRAE Journal - March 2009 - 77
ASHRAE Journal - March 2009 - 78
ASHRAE Journal - March 2009 - 79
ASHRAE Journal - March 2009 - Emerging Technologies
ASHRAE Journal - March 2009 - 81
ASHRAE Journal - March 2009 - 82
ASHRAE Journal - March 2009 - 83
ASHRAE Journal - March 2009 - 84
ASHRAE Journal - March 2009 - 85
ASHRAE Journal - March 2009 - 86
ASHRAE Journal - March 2009 - Washington Report
ASHRAE Journal - March 2009 - Products
ASHRAE Journal - March 2009 - 89
ASHRAE Journal - March 2009 - Special Products
ASHRAE Journal - March 2009 - 91
ASHRAE Journal - March 2009 - People
ASHRAE Journal - March 2009 - Classified Advertising
ASHRAE Journal - March 2009 - 94
ASHRAE Journal - March 2009 - 95
ASHRAE Journal - March 2009 - Advertising Index
ASHRAE Journal - March 2009 - Cover3
ASHRAE Journal - March 2009 - Cover4
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