ASHRAE Technical Committee
1.12 - Moisture Management in Buildings
18, 2012) ASHRAE's Media Relations Manager, decided to feature our
subject area as the focus for the Dallas Meeting
Is Moisture An Unwanted
Occupant In Your Building?
Dec 18, 2012
ASHRAE Seminar Shares how to Remove It
No designer wants to see the unwelcome guests of mold and mildew show
up in their building. Guidance on how to prevent moisture that causes
their appearance is offered in several sessions at ASHRAE’s 2013 Winter
Conference in Dallas.
(December 1, 2012) NIOSH
Building Dampess Alert 2012
December 2012, NIOSH released a formal "Alert" that advises
building owners and occupants of what the Centers for Disease Control
currently currently knows about health-related effects of damp
buildings, and what they recommend to avoid those potential problems.
several of our ASHRAE committees' publications are referenced by the
NIOSH Alert, this new document may be something you might like to have
for your reference library on the subject of mold and dampness.
NIOSH Division of the U. S. Centers for Disease Control has been
investigating health issues in damp buildings for many years. That
process is called a "Health Hazard Evaluation", and the
results are sometimes published by NIOSH after the investigation in
complete. If you go to the CDC's site and search the Health Hazard
Evaluations database using the term "mold", you'll find 178
(April 15, 2010) ASHRAE
Guideline Addresses Interactions Affecting Indoor Environmental Quality
A proposed guideline,
currently out for public comment, would provide guidance on achieving
good indoor environments by considering the interactions of air
quality and thermal conditions as well as lighting and acoustics.
ASHRAE Guideline 10P, Interactions
Affecting the Achievement of Acceptable Indoor Environments,
calls attention to many interactions that designers might not have
previously recognized or understood. The guideline opened for
public comment on April 9 and remains open until May 24.
guideline summarizes what research and experience have taught us
about the complex interplay of the wide range of factors that
determine occupants’ reactions to the buildings they inhabit,” Hal
Levin, chair of the committee writing the guideline, said. Levin
explains that the guideline is intended to help users understand and
use existing documents that deal with indoor environments, including
the ASHRAE standards related to ventilation and indoor air quality
and thermal conditions with a more complete understanding of the
impacts of the indoor environmental on occupants. "It can
provide assistance to building design professionals and building
operators by making them aware of the major interactions that have
the potential to impact the indoor environment,” he said. “We believe
the guideline will help draw attention to the narrowly-defined scopes
of the widely-used standards and the significance of interactive
effects in determining the acceptability of an indoor environment.”
draft of Guideline 10P is available for comment only during its
public review period. To read the guideline or to comment, visit www.ashrae.org/publicreviews.
(January 15, 2010) New
Guidance on Clearing the Indoor Air through Improved IAQ
Ensuring good indoor air
quality (IAQ) means everyone breathes a little easier: occupants who
experience improved health, comfort and productivity, and owners who
see increased building value and reduced risk. New guidance for
achieving enhanced IAQ is available from five leading building
industry associations and the U.S. Environmental Protection Agency.
The book and CD provide strategies needed to achieve good IAQ using
proven technologies and without significantly increasing costs.
health and comfort of buildings occupants is too important to leave
IAQ as an after-thought in design, construction and operation,” said
Andrew Persily, Ph.D., chair of the committee that wrote the new guidance.
“There is plenty of experience out there to help avoid IAQ problems
in buildings, allowing all of us to breathe a little easier."
Indoor Air Quality Guide: Best Practices for Design, Construction and
Commissioning is a collaboration between ASHRAE, the American
Institute of Architects, the Building Owners and Managers Association
International, U.S. Environmental Protection Agency, the Sheet Metal
and Air Conditioning Contractors’ National Association and the U.S.
Green Building Council.
book describes 40 strategies for achieving critical IAQ objectives
related to moisture management, ventilation, filtration and air
cleaning and source control. It also highlights how design and
construction teams can work together to ensure good IAQ strategies
are incorporated from initial design through project completion. A
seminar on the new book is part of the technical program at ASHRAE’s
2010 Winter Conference. To learn more, go to Indoor
Air Quality Guide.
a few tips from the guide on improving IAQ in buildings:
- Bring IAQ into the
very earliest design discussions. Don't get stuck retrofitting
the design for IAQ at the end of the process
- Strictly limit liquid
water penetration and condensation in the envelope, and control
- Where outdoor air
quality is poor, use enhanced filtration and air cleaning to
provide high quality ventilation air. Locate outdoor air
intakes away from contaminant sources and provide the means to
measure and control minimum outdoor airflows.
- Select building
materials and furnishings that have low contaminant emissions
and don't require use of high-emitting cleaning products.
- Exhaust contaminants
from indoor activities as close to their source as possible.
- Recognize that
O&M is essential to long term IAQ, and provide the access,
training and documentation needed to facilitate O&M.
- Commission from
design through occupancy to ensure that IAQ objectives are met.
A summary document of the
Indoor Air Quality Guide, ideal for a general understanding of the
importance of major IAQ issues, can be downloaded for free at Indoor
Air Quality: Position Document. The full publication complete
with a CD that contains detailed guidance essential for practioners
to design and achieve good IAQ is available in hard copy or
electronically for $29. To order, visit the online bookstore at Indoor
Air Quality Guide.
(May 14, 2009) New ASHRAE
Standard Guides Designers in Moisture Control Measures
Moisture and mold don’t
make the headlines the way they once did, but they are still problems
in some structures.
Guidance on how to best design
buildings with adequate moisture control features is contained in a
new standard from ASHRAE. ANSI/ASHRAE Standard 160, Criteria for Moisture
Design Analysis in Buildings, formulates design assumptions for
moisture design analysis and criteria for acceptable performance.
the designer elects to perform a design moisture analysis, the
standard requires he or she to think about the interior conditions
that will be maintained in the building and the effect that may have
on building envelopes,” Anton TenWolde, chair of the committee that
wrote the standard, said. “The standard provides a methodology
for the first time to make consistent design recommendations, such as
the need, type and placement of vapor barriers in any climate.’
standard introduces criteria to handle rain, wind and other exterior
moisture weather loads.
The cost of Standard 160-2009 is $39
($33, ASHRAE members). To order, visit the online bookstore at www.ashrae.org.
(October 7, 2008) ASHRAE
Publishes Residential IAQ Guideline
A new residential
ventilation and indoor air quality (IAQ) guideline is now available
ASHRAE Guideline 24-2008, Ventilation
and Indoor Air Quality in Low-Rise Residential Buildings,
is the companion guideline to ANSI/ASHRAE Standard 62.2-2007, Ventilation and Acceptable
Indoor Air Quality in Low-Rise Residential Buildings, the
only nationally recognized ventilation and IAQ standard developed
solely for residences. Guideline 24 provides information on
achieving good IAQ that goes beyond the requirements contained in
Standard 62.2 by providing explanatory and educational material not
included in the code-intended standard.
The guideline, which was written by the committee responsible for
maintaining Standard 62.2, includes information on envelope and
system design, material selection, commissioning and installation,
and operation and maintenance.
Committee chair Steven Emmerich said, “While Standard 62.2 contains
the essential minimum requirements that all low-rise residential
buildings should meet to achieve acceptable IAQ, Guideline 24 is an
essential resource for designers, builders and others looking for
reliable information on topics not covered in the standard or seeking
to go beyond minimum for high performance construction. Topics
covered range from fundamentals of building airflow to humidity
control to verification of equipment performance.”
The cost of Guideline 24-2008 is $54 ($43 for ASHRAE members). To
order, visit the online bookstore at www.ashrae.org.
(January 16, 2008) ASHRAE
Publishes Book on Hot, Humid Climate Building Design Guidance
Building operators and
designers around the world face common issues related to thermal
comfort, ventilation and energy. But these measures take on greater
concern for buildings in hot and humid climates. In addition, areas
with these climates, such as South Asia
, are experiencing rapid construction growth.
guidance on critical issues for achieving excellence and long-term
sustainability in these climates is contained in a new book from
ASHRAE. The ASHRAE Guide for Buildings in Hot and Humid Climates
identifies and explains key issues for owners, architects, HVAC
designers, contractors and building owners as they plan, build and
operate air-conditioned buildings – in a sustainable way – in hot and
humid climates. “All countries want to achieve high standards of energy
efficiency,” author Lew Harriman said. “But recent history warns that
mold and mildew problems in hot and humid climates can overshadow any
gains made through energy reduction. On the other hand, the practical
experience of ASHRAE’s members shows that by focusing on several
critical building enclosure design details and by keeping the indoor
air dry, owners and designers can avoid mold problems and have high
indoor air quality, while their buildings use much less energy than
covered in the book include improving thermal comfort, managing
ventilation air, reducing energy consumption and avoiding bugs, mold
and rot. The book explains ASHRAE’s standards in these areas. It
also highlights common problems seen in hot and humid climates, along
with practical alternatives for avoiding such problems.
guide was created in part because of requests from designers and owners
in North America , but also because
of requests from government agencies in developing countries that are
working to establish robust building codes to guide energy use and
indoor environmental quality,” Harriman said. “When balancing the
equally important concerns of low energy consumption, high thermal
comfort and healthy indoor air, ASHRAE’s experience and
internally-informed consensus standards can be very helpful.”
second edition is planned for January 2009 that will add more
information arranged into sections aimed at each different member of
the construction and delivery team. The cost of The ASHRAE Guide for
Buildings in Hot and Humid Climates is $59 ($49 for ASHRAE
members). To order, visit the online bookstore at www.ashrae.org.
(October 9, 2007) ASHRAE
Provides Guidance on Achieving Good IAQ
Providing design guidance
on how to achieve good indoor air quality is the aim of a proposed
guideline from ASHRAE now open for public comment. Guideline 24P, Ventilation and Indoor Air
Quality in Low-Rise Residential Buildings, is the
companion guideline to ASHRAE Standard 62.2, Ventilation and Acceptable
Indoor Air Quality in Low-Rise Residential Buildings. The
guideline is open for public comment until Oct. 29, 2007.
proposed guideline would provide information on envelope and system
design, material selection, commissioning and installation, and
operation and maintenance. The guideline goes beyond the requirements
contained in Standard 62.2 by providing explanatory and educational
material that would be inappropriate in the code-intended standard.
Topics addressed in the guideline but not covered in the standard
include carbon monoxide alarms, air distribution, better air
filtration and unvented combustion appliances.
both Standard 62.2 and Guideline 24P seek to provide acceptable
indoor air quality, the guideline goes beyond by providing additional
information for achieving good indoor air quality,” Steve Emmerich,
chair of the committee writing the guideline, said. “The guideline
also provides information on topics such as verification of
ventilation equipment performance and operations and maintenance,
which, though important, are not easily addressed in a code-intended
(June 7, 2007) ASHRAE
Publishes 2007 Residential IAQ Standard
The 2007 version of the
ASHRAE residential indoor air quality standard is now available.
ANSI/ASHRAE Standard 62.2-2007, Ventilation
and Acceptable Indoor Air Quality in Low-Rise Residential Buildings,
is the only nationally recognized indoor air quality standard
developed solely for residences. It defines the roles of and
minimum requirements for mechanical and natural ventilation systems
and the building envelope intended to provide acceptable indoor air
quality in low-rise residential buildings.
to the standard from the 2004 version include application of
exceptions based on climate map zones vs. degree-day based, making it
easier to apply the standard; inclusion of a new technology of
condensing dryers that do not have an exhaust flow like traditional
dryers; and a change in requirements for testing and rating
cost of Standard 62.2-2007 is $39 ($32 to ASHRAE members). To order,
visit the online bookstore at www.ashrae.org.
(May 31, 2007) International
Code Council Adopts 62.1 Ventilation Rate Procedure
Approval of ASHRAE’s
Standard 62.1 ventilation rate calculation procedure for the
International Mechanical Code (IMC) marks a milestone for the
high-profile mandatory-language standard after years of development
aimed at code adoption. This week, the International Code Council
approved an ASHRAE proposal to incorporate the prescriptive
ventilation rate procedure from ANSI/ASHRAE Standard 62.1-2004, Ventilation for Acceptable
Indoor Air Quality, in the IMC. The code establishes
minimum regulations adopted and implemented by federal, state and
local government agencies for mechanical systems in new buildings.
adoption of the new ventilation rates into building codes, we can
expect to see reduced air intake flow in many previously
over-ventilated buildings,” Dennis Stanke, chair of the 62.1
committee. “With adoption of the new calculation procedures, we can
expect to see improved indoor air quality in many previously
under-ventilated multiple-zone systems. Ventilation systems with
lower outdoor rates compared to the current code reduce both first
costs and energy costs, while system designs that account properly
for air distribution within buildings result in better indoor air
quality than designs based on over-simplified air distribution
current ventilation criteria in the IMC are based on ASHRAE Standard
62-1989. Based on 20 years of IAQ research and experience with
ventilation system design, ASHRAE introduced an improved version of
the standard in 2004 to include the new rates and calculation
procedures. This code change makes both the IMC and the 2006 Uniform
Mechanical Code consistent with the ASHRAE standard.
new ventilation rate procedure requires designers to account for
pollutant sources from both the building and its occupants, and to
account for the efficiency of different ventilation systems when
delivering outdoor air to the breathing zone,” Stanke said.
new requirements will be included in the 2007 IMC Supplement.
(May 30, 2007) Organizations
Collaborate to Provide IAQ Guidance
organizations related to the built environment are collaborating to
provide advanced indoor air quality (IAQ) design guidance for the
industry. The collaboration will develop a book and professional
development course that will describe an integrated process for
achieving improved IAQ in all elements of a building.
organizations are the American Society of Heating, Refrigerating and
Air-Conditioning Engineers (ASHRAE), the American Institute of
Architects (AIA), the Building Owners and Managers Association
(BOMA), the U.S. Environmental Protection Agency (EPA), the Sheet
Metal and Air Conditioning Contractors’ National Association
(SMACNA), and the U.S. Green Building Council (USGBC). The groups
recently formalized the collaboration through a memorandum of
book and course will give guidance to designers and builders so that
buildings may be constructed, operated and maintained to improve IAQ
without constraining the building function or the comfort and
productivity of the occupants,” said Andrew Persily, chair of the
steering committee overseeing the project.
year, ASHRAE was awarded a $510,000 three-year cooperative agreement
with the EPA to develop the Advanced Indoor Air Quality (IAQ) Design
Guide for Non-Residential Buildings. The book will assist building
professionals in implementing high-performance designs and improving
building IAQ performance in a broad range of buildings. The book is
expected to be published in April 2009 and followed later in the year
by the course.
(May 22, 2007) ASHRAE
Publishes New Standard 62.1
ASHRAE’s new 2007
ventilation standard contains key changes impacting ventilation system
designers and their designs. ANSI/ASHRAE Standard 62.1-2007, Ventilation for Acceptable
Indoor Air Quality, sets minimum ventilation rates and
other requirements for commercial and institutional buildings.
new standard includes requirements for the separation of areas with
environmental tobacco smoke (ETS) from areas without ETS in the same
building. Although some local building and health codes prohibit
smoking indoors in many buildings and locations, other codes allow
smoking in designated areas. In buildings that allow smoking in
designated areas, effective separation of ETS areas ensures “ETS-free”
areas contain little or no ETS-related contaminants. The new separation
requirements help designers ensure effective separation, according to
Dennis Stanke, committee chair.
change clarifies of how designers must analyze mechanical cooling
systems to help limit space relative humidity. Many buildings suffer
from air quality problems related to dampness, including mold and other
microbial growth. In the past, the standard required a design analysis
at specified load conditions, in an effort to demonstrate that a given
design approach in a given climate could successfully limit space RH to
65 percent or less.
load conditions could be confusing and difficult to establish,” Stanke
said. “The new requirements include a specific easy-to-establish load
condition. Each system must be analyzed to check its dehumidification
performance at this challenging condition to help designers make system
configuration and control choices that reduce the likelihood of high-humidity
problems in buildings.”
- Additions to Table 6-1
of minimum outdoor air requirements for dwelling units in
high-rise residential buildings. These requirements apply to
residences in buildings over three stories. Low-rise residential
buildings are covered by ASHRAE Standard 62.2, Ventilation and
Acceptable Indoor Air Quality in Low-Rise Residential Buildings.
- New or previously
overlooked occupancy categories. In response to proposed changes
from users of the standard, ASHRAE added several occupancy
categories to Table 6-1 with associated minimum outdoor air rates.
These include, for example, daycare sickrooms, university/college
laboratories, break rooms and coffee stations, and laundry rooms.
The cost of ASHRAE Standard
62.1-2007 is $65 ($52 for ASHRAE members). To order, visit the online
bookstore at www.ashrae.org.
(January 16, 2007) Indoor
Environmental Design Focus of ASHRAE Satellite Broadcast
Specific solutions to the
everyday challenges of achieving indoor environmental quality within
real-world budget constraints will be presented by ASHRAE in an
upcoming satellite broadcast/Webcast.
Environmental Design: Practical Solutions to Everyday Problems, sponsored
by ASHRAE’s Chapter Technology Transfer Committee, will take place from
1-4 p.m. EDT, April 18, 2007.
program will benefit designers, building owners, architects,
contractors and facility managers who are faced with the daily engineering
challenge of specifying systems that maximize IAQ, thermal comfort and
noise control," said Bill Williams, chair of the broadcast
committee. "Viewers will be given guidance on how to provide
ventilation air that helps protect buildings instead of increasing mold
risk, how to avoid the three most common mistakes in ventilation system
design and operation, and how to provide comprehensive filtration
without breaking their budget."
Coad, PE, president of Coad Engineering Enterprises, St.
Louis, Mo., and past ASHRAE president, will present an overview
perspective on indoor environmental quality and introduce the following
panel of experts:
• Hoy Bohanon Jr., PE,
owner and consultant, Bohanon Engineering Winston-Salem, N.C.,
"Ventilation System Design: Avoiding Three Common Mistakes"
• Lew Harriman,
director of research, Mason-Grant, Portsmouth, N.H., "Ventilation
Air: First, Do No Harm"
• Dan Int-Hout,
chief engineer, Krueger-HVAC, Richardson, Texas, "Noise, IAQ and
Thermal Comfort – Can You Have It All?"
• Chris Muller,
technical director, Purafil, Doraville, Ga., "Behind the Access
Door – Advances in Affordable Filtration for IAQ"
(September 22, 2006) 1st Public Review of ASHRAE Standard 160P,
Design Criteria for Moisture Control in Buildings
This is the first
public review of proposed new Standard 160P. It specifies
performance-based design criteria for predicting, mitigating, or
reducing moisture damage to buildings depending upon climate,
construction type, and HVAC system operation. It applies to all types
of buildings, building components and materials.
45-day public review period runs from September 22, 2006 to November 6,
(May 18, 2005) ASHRAE
Position Document on Mold
Due to the proliferation of
mold in buildings, sound moisture management should take precedence
over energy cost savings, according to a new position document from the
conservation goals may conflict with moisture management goals. In
fact, traditional methods of dehumidification, such as reheat systems,
may increase energy use, Ron Vallort, ASHRAE president, said.
“Considering energy conservation and moisture management goals in the
design, construction, operation and maintenance of HVAC systems can
minimize energy use and cost,” he said. “However, the impact of mold
proliferation suggests that energy cost savings should not be achieved
at the expense of sound moisture management.”
Indoor Mold Through Management of Moisture in Building Systems outlines
ASHRAE’s position on the management of moisture in buildings by
describing issues related to the topic and highlighting resources
available through the Society regarding the management of moisture and
mold in buildings. The document recommends that for proper moisture
envelopes, penetrations and building systems be designed and built to
protect the indoor environment and the building materials from water
infiltration or accumulation.
• Building and
system design consider internal or exterior moisture that could cause
condensation on surfaces or within materials.
• Building and
system design, operation and maintenance provide for drying of surfaces
and materials prone to moisture accumulation under normal operating
• Building and
system design, operation and maintenance provide for water management
of surfaces and materials that are expected to have moisture present.
system design should properly address ventilation air.
• Building and
system design, construction and operation take into account occupant
building have an operation and maintenance plan.
• The sequence
of operation for the HVAC system contain appropriate provisions to
manage humidity, control pressurization and monitor critical
accumulation be investigated in a timely manner and steps be taken to
identify and control the course of water.
(February 14, 2005) Register
For ASHRAE Satellite Broadcast or Webcast on Mold
mold in the building environment are no longer limited to just humid
environments or North America. Mold is now a global concern for
designers, contractors, building owners/operators and building
occupants. Information on how to properly control moisture and humidity
conditions in order to minimize mold will be presented in an
April 13, 2005 (1:00 to 4:00 PM EDT), satellite broadcast and Webcast, Mold
in Our Building Environment, sponsored by ASHRAE’s Chapter
Technology Transfer Committee (CTTC).
(December 8, 2004) ASHRAE 2005 Public Session: Battling
Humidity in Southern Climates
“Beat the heat” takes on
special meaning in Florida as the HVAC&R industry fights the battle
between energy costs and hot and humid climates. “Florida has a
tropical climate that affects all aspects of life in the area - at
home, at work and at leisure,” Fred Betz said. “As a result, a
significant problem and concern in Florida is energy usage and humidity
control.” Guidance on energy and humidity control techniques in
building design and construction, types of equipment that can be used,
and how to commission and maintain these systems will be provided by
the American Society of Heating, Refrigerating and Air-Conditioning
Engineers (ASHRAE) at its 2005 Winter Meeting, Feb. 5-9, Orlando, Fla.
public session, Energy and Humidity Reduction Practices in Southern
Climates, will take place from 3-5 PM on Monday, February 7, at the
Orange County Convention Center. Admission is free, and registration is
not required. The session features five speakers from the central
Florida engineering and research community who will focus on HVAC
challenges in Florida, according to Betz, chair of the session.
Speakers and topics are:
"Florida’s New Energy Code: What’s Changing in July 2005," by
Muthusamy Swami, Florida Solar Energy Center, Cocoa, Fla. The new state
code is slated to go into effect July 1, 2005. Swami will discuss the
current status and upcoming changes to the energy code for commercial
buildings. Impact of changes, compliance pathways and relationship to
national codes and standards will be discussed as well as tools and
resources available to compliance users.
Buildings: Why Everything Interacts," by Neil Moyer, Florida Solar
& Lighting Systems: Reducing Sensible Gains," by Wayne Dunn,
SunBelt Engineering, Jacksonville, Fla.
Strategies for Ventilation and High Humidity Control," by Don
Shirey, Florida Solar Energy Center.
"Commissioning: Cradle to Grave Building Design," by J. David
Odom, Liberty Building Diagnostics Group, (location). A few buildings
begin life as catastrophic problems, often requiring massive amounts of
money and attention to correct their defects. A much larger number of
buildings begin life with nuisance problems that require significant
corrective attention soon after they are occupied. Both of these
problematic building types, and even the pool of well performing
buildings, often gradually degrade into poor performance as they age.
Odom will focus on risk factors that buildings face from infancy to old
age and what can be done to improve their performance.
(October 7, 2004) ASHRAE Sponsors Education Courses at
2005 Winter Meeting
education courses, including a professional development seminar on
preventing moisture problems, will be offered by the ASHRAE Winter
Meeting, February 5-9 in Orlando, Florida.
Moisture and Mold Problems: Design and Construction Guidelines
(instructors: David MacPhaul, P.E., CH2M Hill, and J. David Odom,
Liberty Building Diagnostics Group Inc.) will be held from 8 AM to 3 PM
on Saturday, February 5 at the Wyndham Palace Resort.The cost of this
professional development seminar is $460 ($360 for ASHRAE members), and
attendees will earn continuing education credits.
(October 7, 2004)
Controlling Mold Strong Focus of ASHRAE 2005 Winter Meeting
warm and sunny weather that draws millions of tourists to Florida, site
of ASHRAE’s 2005 Winter Meeting, translates into a hot and humid
climate that can lead to problems with mold and mildew. Several
sessions related to hot and humid climates, including Florida,
will be presented at the American Society of Heating, Refrigerating and
Air-Conditioning Engineers’ meeting, Feb. 5-9, Orlando, Fla., at the
Wyndham Palace Resort. Ninety-five sessions will be presented as part
of the technical program.
constructing and operating buildings in locations such as Florida is
difficult due to the hot and humid climate,” Kelley Cramm, chair of the
Society Program Committee, said. “Our goal is to make engineering in
these climates easier by providing guidance on humidity control issues,
techniques and equipment.”
seminar addresses design and construction in hot and humid climates,
focusing on design of walls, roofs, mechanical systems and interior
finishes as they relate to moisture control, durability and indoor air
quality. Another seminar focuses on mold and mildew case studies in
Florida, including a presentation on the effects of operation and
control of mechanical systems on mold growth in hotels.
considerations are required in most applications today. A seminar
addresses the relationship of moisture and mold dehumidification, and
methods and solutions to improve dehumidifier efficiencies. Using
air-to-air energy recovery to meet new humidity control requirements in
ASHRAE’s ventilation standard is addressed in a seminar. Up-sizing of
air-conditioning equipment usually does not improve humidity control in
hot and humid climates, but appropriate application of air-to-air
energy recovery systems and related technologies can help designers
meet the requirements.
technical program is comprised of 55 seminars (presentations on a
central or related topic with no published papers), 17 symposia
(presentations with papers on a central subject), 19 open-discussion
forums, two technical sessions (paper presentations), a poster session
and a public session. A total of 105 papers will be presented.
(September 17, 2004) ASHRAE
to Host Satellite Broadcast on Mold
mold in the building environment are no longer limited to just humid
environments or North America. Mold is now a global concern for
designers, contractors, building owners/operators and building
occupants. Information on how to properly control moisture and humidity
conditions in order to minimize mold will be presented in an April
13, 2005, satellite broadcast and Webcast, Mold in Our Building
Environment, sponsored by ASHRAE’s Chapter Technology Transfer
management and humidity control require a team effort during the
design, construction, start-up and operation phases of a
facility,” Wilfred Laman, chair of CTTC, P.E. said. “If any part of the
team fails to perform their tasks in proven and prescribed methods, the
facility may promote mold formation and growth. This broadcast will be
beneficial to all team members by describing how each should perform
their tasks properly.” The level of interest in mold has also
expanded to the legal profession due to the claim that “mold is gold”
based upon recent jury awards in mold-related cases, according to
Laman. For situations where mold is present, various proven assessment
and remediation processes will be addressed for different types of
include biological, chemical, investigative and health experts, design
architects, engineers and contractors who specialize in mitigation.The
broadcast will be similar to the 2004 ASHRAE broadcast on homeland
security, which as viewed by more than 20,000 viewers at more than
1,500 locations earlier this year.Program and site registration details
will be announced soon.
(September 2, 2004) Humidity
Control I and II Professional Development Seminar Offered Online
ASHRAE will present its fall
professional development seminars online. The professional development
seminars traditionally are held in cities across the nation. Following
the success of an online pilot course held earlier this year, ASHRAE
decided to host the seminars online.
Humidity Control I and II will take place from 1-4 p.m. (EDT) Oct.
The course, based on ASHRAE’s Humidity Control Design Guide for
Commercial and Institutional Buildings, will help designers achieve
true control of humidity rather than just its moderation. The first day
of the humidity course will focus on basic principles, loads and
equipment. The second day will focus on applications, control levels
and mold avoidance. The instructor is
Lew Harriman, author of the design guide and director of research and
consulting at Mason-Grant in Portsmouth, N.H.
(May 25, 2004) Study Links
Mold to Some Ailments
Scientific evidence links
mold and other factors related to damp conditions in homes and other
buildings to asthma symptoms in some asthmatics as well as to coughing,
wheezing and other upper respiratory tract symptoms in otherwise
healthy people, says a new report by the Institute of Medicine of the National Academies. The
available evidence does not support an association between either
interior dampness or mold and the wide range of other health complaints
that have been ascribed to them, but the possibility of a link cannot
be ruled out.
(May 25, 2004) Mold, Other
Environmental Concerns Addressed in ASHRAE Seminar
Environmental Health Issues:
Mold and Other Indoor Environment Concerns will take place from 10:15 a.m.-12:15 p.m. Monday,
June 28. It is sponsored by ASHRAE’s Environmental Health Committee. It
will feature presentations on health effects associated with exposure
to indoor air. Indoor air chemistry and the topical issues related to
mold and ventilation systems including mold prevention in new
construction are presented, according to chair Sidney Parsons, P.E.,
Council of Scientific and Industrial Research, South Africa.
(April 23, 2004) Indoor
Environments Highlighted in ASHRAE Technical Program
To help designers,
engineers, contractors and others meet those expectations, indoor air
quality and comfort will be a strong focus of the ASHRAE 2004 Annual
Meeting technical program. Ninety-three technical program sessions will
be presented at the meeting, which takes place June 26-30, at the
Gaylord Opryland Resort and Convention Center, Nashville, Tenn. Some 25
sessions will focus on indoor air quality and comfort as well as
ventilation and air distribution.
seminar focuses on new means of controlling humidity through HVAC
equipment and energy recovery systems. The potential for fungal growth
is exacerbated by improper sizing of equipment. Another seminar
examines current engineering and legal issues that must be considered
in designing, constructing and operating buildings. Some estimate that
mold litigation and insurance claims may exceed asbestos and Superfund
(December 12, 2003) ASHRAE
Offers Information on Control of Mold, Moisture
A new online technical
resource, Mold and Moisture Management in Buildings, contains 22
ASHRAE Journal articles and papers presented at ASHRAE IAQ conferences
and semi-annual meetings. "This collection provides extensive
technical background along with specific suggestions for avoiding mold-
and moisture-related problems," Lew Harriman, a member of ASHRAE's
technical committee on moisture management in buildings, said. The
papers and articles address mold fundamentals, moisture movement in
building assemblies, dehumidification and HVAC systems, and also
discussions of typical problems and solutions for both commercial and
associated with mold and moisture seldom fall neatly into any single
professional responsibility," according to Harriman.
"Biology, medicine, engineering, architecture, construction and
building operation all contribute to understanding and managing
moisture in buildings. When difficulties occur, they usually expose
gaps between these disciplines and often expose shortcomings of our
overall understanding of the behavior of moisture and its consequences."
collection can help the professional community as well as the general
public understand the technical issues surrounding mold and mildew,
according to Harriman. The cost of Mold and Moisture Management in
Buildings is $49 ($35 ASHRAE members).
(March 7, 2003) Advice
Dispensed at ASHRAE Public Session: Proper Equipment Sizing, Good
Maintenance Solves Mold Problems
How do you prevent mold in
small commercial and residential buildings? By removing the water,
according to a speaker at the American Society of Heating,
Refrigerating and Air-Conditioning Engineers' (ASHRAE) recent public
session. Simple steps to remove mold in small commercial and
residential buildings by decreasing humidity were presented at the
public session held in Chicago, IL during ASHRAE's 2003 Winter Meeting,
(December 27, 2001) ASHRAE
Book Advises Cost-Effective Humidity Control
As concern grows over
moisture damage in commercial buildings, members of building teams need
practical advice to minimize the costs and maximize the benefits of
controlling humidity. The Humidity Control Design Guide for
Commercial and Institutional Buildings, published by the American
Society of Heating, Refrigerating and Air-Conditioning Engineers
(ASHRAE), provides such guidance.
was last updated on 1st June 2013.
web site describes the activities of the American Society of Heating,
Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE) Technical
Committee 1.12, Moisture Management in Buildings. It does not present official
positions of the Society nor reflect Society policy. ASHRAE is not
responsible for this site's content. To learn more about ASHRAE activities
on an international level, contact the ASHRAE home page at http://www.ashrae.org. Comments? Contact
us at TC 1.12 Chair, ASHRAE TC 1.12