ASHRAE Journal - August 2013 - 57

Technical FeaT
FeaTure

Materials Selection

potential source strength, but are limited in terms of
By BoB Magee
prediction of the true impact on indoor air levels of
The “solution to pollution is dilution” or “build tight vencontaminants of concern. More comprehensive evalutilate right” approaches can be ineffective/costly ways
ation is provided by emissions chamber testing of prodto achieve “healthy” indoor environments if other
ucts or through validated mass transfer-based modelfactors are ignored. A careful systematic approach to
ling of emissions. These approaches can lead to reasonthe design and operation of buildings is essential to
able prediction of indoor levels of a broad spectrum of
proactively avoid IAQ problems and minimize true
organic (and possibly particulate) contaminants resultoperational costs (including those related to occuing from the installation of a specific amount of a given
pant productivity). These concepts, while not new,
material indoors. The resulting ability to estimate acute
are increasingly threatened by resurgent pressures to exposures (critical to determination of risk for workers
build energy-efficient buildings.
involved in installation of new materials as well as for
Appropriate selection of building products, finishes
establishing safe re-occupancy times following renoand furnishings is a key aspect in the proactive control vation activities) may be equally important in certain
of indoor sources of health-relevant organic contamicases to the long-term, chronic exposure levels that are
nants given the fact that emissions (or “off-gassing”)
key to building occupants.
from products (including paints, adhesives, engineered
Harmonization of the methodologies used in the evaluwood materials, flooring, etc.) can easily vary by orders ation of product emissions, the estimation of indoor
of magnitude. Long-term durability is another key
levels based on emissions data, and on the identities
consideration (reducing the frequency of replacement and levels of concern for specific indoor contaminants
and associated higher emissions from new materials) as (including semi-volatile organic compounds, or SVOCs,
is selection of materials that can be cleaned using rela- such as phthalates, flame retardants; as well as reactive
tively inert (low emission) cleaning agents.
compounds such as isocyanates) are all key elements
So how does the building design/renovation/opera- under consideration in North America, Europe and globtion team make effective material selection choices?
ally. These challenging tasks will have enormous impact
Product labeling systems based on content of volaon the effective identification of low-emission materials
tile organic compounds (VOC), typically expressed
suitable for use in truly “sustainable” buildings.
Bob Magee works for National Research Council Canada.
as mass per unit volume, provide some indication of
re-ignite the “Disney-like” dream of the “bubble” building. Walter dreamed in 1960 that Epcot and Celebration
and Disneyland would all be under a bubble…a totally
environmentally controlled community for live, work,
and play. I believe that the totally enclosed, minimally
pressurized building is possible and practical through
the use of FAC for contaminant control. This eliminates
the dependency on the energy cost and availability of
clean and dry outdoor air for contaminant control by
dilution and provides increased cleanliness efficiencies
providing an indoor environment that will approach
clean-room conditions.
The trend for high capacity, high efficiency, and lower
pressure-drop FAC systems will continue through tactics
like mini-pleating, over-sizing, product development, and
combination particulate and gas phase control products.
The awareness of the impact of PM 2.5 particulates

on respiratory effects and the increasing knowledge
about the role of environmental toxins are hinting at the
exposure influence on health issues like arthritis, allergies, diabetes, heart disease, weak immunity, fatigue,
dementia, and even obesity. This indicates the need for
improved control of the particulate and chemical contaminant burden in the indoor environment and may
bode for regulatory coverage.
The importance of indoor contamination control will
drive energy, ventilation, and sustainability Standards,
like 62, 90, and 189 to more fully exploit the potential
of applied FAC technology. Likewise, building performance protocols, like LEED, will more strongly support
enhanced FAC tactics as being both cost effective and
energy effective.
The need for low energy usage, high performance,
and low maintenance requirements will drive the
Au g ust 2013

ashrae.org

ASHRAE JouRnAl

57



ASHRAE Journal - August 2013

Table of Contents for the Digital Edition of ASHRAE Journal - August 2013

Contents
Commentary
Industry News
Letters
Meetings and Shows
Feature Articles
Presidential Address: Shaping the Next
Technical vs. Process Commissioning: Owner’s Project Requirements
Energy Codes & Standards, Part 2
Shaping the Next: Indoor Air Quality
Cutting-Edge Renovation
System Efficiency for Natural Refrigerants
Standing Columns
Building Sciences
InfoCenter
Data Centers
Emerging Technologies
HVAC Applications
Energy Modeling
Refrigeration Applications
Product Showplace
People
Classified Advertising
Advertisers Index
ASHRAE Journal - August 2013 - Cover1
ASHRAE Journal - August 2013 - Cover2
ASHRAE Journal - August 2013 - 1
ASHRAE Journal - August 2013 - 2
ASHRAE Journal - August 2013 - Contents
ASHRAE Journal - August 2013 - Commentary
ASHRAE Journal - August 2013 - 5
ASHRAE Journal - August 2013 - Industry News
ASHRAE Journal - August 2013 - 7
ASHRAE Journal - August 2013 - 8
ASHRAE Journal - August 2013 - 9
ASHRAE Journal - August 2013 - 10
ASHRAE Journal - August 2013 - 11
ASHRAE Journal - August 2013 - 12
ASHRAE Journal - August 2013 - 13
ASHRAE Journal - August 2013 - Letters
ASHRAE Journal - August 2013 - 15
ASHRAE Journal - August 2013 - 16
ASHRAE Journal - August 2013 - 17
ASHRAE Journal - August 2013 - 18
ASHRAE Journal - August 2013 - 19
ASHRAE Journal - August 2013 - Meetings and Shows
ASHRAE Journal - August 2013 - 21
ASHRAE Journal - August 2013 - Presidential Address: Shaping the Next
ASHRAE Journal - August 2013 - 23
ASHRAE Journal - August 2013 - 24
ASHRAE Journal - August 2013 - 25
ASHRAE Journal - August 2013 - 26
ASHRAE Journal - August 2013 - 27
ASHRAE Journal - August 2013 - 28
ASHRAE Journal - August 2013 - 29
ASHRAE Journal - August 2013 - 30
ASHRAE Journal - August 2013 - 31
ASHRAE Journal - August 2013 - Technical vs. Process Commissioning: Owner’s Project Requirements
ASHRAE Journal - August 2013 - 33
ASHRAE Journal - August 2013 - 34
ASHRAE Journal - August 2013 - 35
ASHRAE Journal - August 2013 - 36
ASHRAE Journal - August 2013 - 37
ASHRAE Journal - August 2013 - 38
ASHRAE Journal - August 2013 - 39
ASHRAE Journal - August 2013 - Energy Codes & Standards, Part 2
ASHRAE Journal - August 2013 - 41
ASHRAE Journal - August 2013 - 42
ASHRAE Journal - August 2013 - 43
ASHRAE Journal - August 2013 - 44
ASHRAE Journal - August 2013 - 45
ASHRAE Journal - August 2013 - 46
ASHRAE Journal - August 2013 - 47
ASHRAE Journal - August 2013 - 48
ASHRAE Journal - August 2013 - 49
ASHRAE Journal - August 2013 - Shaping the Next: Indoor Air Quality
ASHRAE Journal - August 2013 - 51
ASHRAE Journal - August 2013 - 52
ASHRAE Journal - August 2013 - 53
ASHRAE Journal - August 2013 - 54
ASHRAE Journal - August 2013 - 55
ASHRAE Journal - August 2013 - 56
ASHRAE Journal - August 2013 - 57
ASHRAE Journal - August 2013 - 58
ASHRAE Journal - August 2013 - 59
ASHRAE Journal - August 2013 - Cutting-Edge Renovation
ASHRAE Journal - August 2013 - 61
ASHRAE Journal - August 2013 - 62
ASHRAE Journal - August 2013 - 63
ASHRAE Journal - August 2013 - 64
ASHRAE Journal - August 2013 - 65
ASHRAE Journal - August 2013 - System Efficiency for Natural Refrigerants
ASHRAE Journal - August 2013 - 67
ASHRAE Journal - August 2013 - 68
ASHRAE Journal - August 2013 - 69
ASHRAE Journal - August 2013 - 70
ASHRAE Journal - August 2013 - 71
ASHRAE Journal - August 2013 - Building Sciences
ASHRAE Journal - August 2013 - 73
ASHRAE Journal - August 2013 - 74
ASHRAE Journal - August 2013 - 75
ASHRAE Journal - August 2013 - 76
ASHRAE Journal - August 2013 - 77
ASHRAE Journal - August 2013 - 78
ASHRAE Journal - August 2013 - 79
ASHRAE Journal - August 2013 - 80
ASHRAE Journal - August 2013 - 81
ASHRAE Journal - August 2013 - InfoCenter
ASHRAE Journal - August 2013 - 83
ASHRAE Journal - August 2013 - 84
ASHRAE Journal - August 2013 - 85
ASHRAE Journal - August 2013 - 86
ASHRAE Journal - August 2013 - 87
ASHRAE Journal - August 2013 - Data Centers
ASHRAE Journal - August 2013 - 89
ASHRAE Journal - August 2013 - 90
ASHRAE Journal - August 2013 - 91
ASHRAE Journal - August 2013 - Emerging Technologies
ASHRAE Journal - August 2013 - 93
ASHRAE Journal - August 2013 - 94
ASHRAE Journal - August 2013 - 95
ASHRAE Journal - August 2013 - HVAC Applications
ASHRAE Journal - August 2013 - 97
ASHRAE Journal - August 2013 - Energy Modeling
ASHRAE Journal - August 2013 - Refrigeration Applications
ASHRAE Journal - August 2013 - Product Showplace
ASHRAE Journal - August 2013 - 101
ASHRAE Journal - August 2013 - People
ASHRAE Journal - August 2013 - Classified Advertising
ASHRAE Journal - August 2013 - Advertisers Index
ASHRAE Journal - August 2013 - Cover3
ASHRAE Journal - August 2013 - Cover4
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