indoor air quality

SDI Practice Announcement – New 32 Storey Hotel in China

Posted by CJ Walsh

2013-04-02:  Sustainable Design International Ltd. (SDI) is pleased to announce that its Managing Director, C.J. Walsh, has been invited to be ‘Project Design Architect’ / ‘Design Professional in Responsible Charge’ for a New 32 Storey Hotel in Yunnan Province, People’s Republic of China (PRC).

He will have responsibility for the Project’s Architectural Concept Design and General Schematic Design … including the overall architectural character and profile of primary exterior surfaces.

Project Approximate Value = € 65 Million (Euros) … excluding interior design, finishes and furnishing (which could end up doubling, or even tripling, the overall project value).

Sustainable Design International Ltd.  maintains a strict practice policy of Client Confidentiality.

[ If this Type of Professional Design Service Appeals to You, or Your Organization – Contact Us Immediately ! ]

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2012 ‘Understanding China’ Policy Briefing – Friends of Europe & EuroChambres

An estimated One Billion People will be living in China’s cities by 2030.  This large-scale and very rapid urbanization demands that a sustainable transformation of their urban built, social, economic and institutional environments commences Today – not at some notional point in a far distant future.

Furthermore … replicating a European approach to sustainable design and construction in other regions of the world is doomed to failure.  Urban Transformation in China must be adapted to Local Geography, Climate, Climate Change, Social Needs, Cultures, Economy, and Local Severe Events (e.g. earthquakes, flooding).  With European support and collaboration … China must, and will, find its own way.

Greening China's Cities of Tomorrow (2012) - Report CoverGreening China’s Cities of Tomorrow (Spring 2012)

Click the Link Above to read and/or download a PDF File (4.42 Mb)

Report on a One-Day China Advisory Council Roundtable, co-organized by Friends of Europe and EuroChambres, which was held in Brussels on 8 March 2012.  This event was part of an ‘Understanding China’ Programme (mid-2009 to mid-2012), co-funded by the European Commission.

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2013 Asian Development Bank (ADB) Guidebook: ‘Increasing Climate Change Resilience of Urban Water Infrastructure’ 

This Guide describes a practical approach to bridge the gap between theoretical analyses of climate change impacts and the planning decisions that need to be made by city authorities and utility managers to increase climate change resilience of the water sector in the city of  Wuhan, Hubei Province, People’s Republic of China (PRC).  It focuses on answering the questions currently being asked by city planners and managers all over the world, as follows:

  • What changes might be caused by climate change ?
  • How will these changes affect services and utilities ?
  • What can we do now to prepare for them ?

The long lead time required to plan, finance, build, and commission city infrastructure facilities means that decision makers cannot wait for more detailed data on the effects of future climate change, especially those relating to local circumstances, but must make investment decisions based on what is known now and what can be readily predicted.  An important principle in this kind of ‘robust’ decision-making is provided by the  Intergovernmental Panel on Climate Change (IPCC)  tenet that adaptation investments, which move a city’s infrastructure toward sustainable development (such as providing safe drinking water and better sanitary conditions), are justifiable even without climate change.

This Guide is arranged in clear steps to provide direction and information for similar exercises in other areas.  Having grown out of a specific locality and its needs, the principles and solutions developed in this guide are founded on real world situations and problems …

ADB Guidebook: 'Increasing Climate Change Resilience of Urban Water Infrastructure' (2013) - Cover PageIncreasing Climate Change Resilience of Urban Water Infrastructure (ADB, 2013)

Click the Link Above to read and/or download a PDF File (2.31 Mb)

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***  THIS TALL BUILDING IN YUNNAN PROVINCE  &  SIMILAR COMPLEX ARCHITECTURAL PROJECTS  ***

Working within the professional constraints of ‘client confidentiality’ … it is possible to have a general discussion about current building design, construction and operation issues in an international sector which is operating, more and more, beyond national borders … without adequate, or very often any, national and local regulation.  By ‘regulation’, I mean a flexible system of building-related legislation which is operated in conjunction with mandatory and effective technical control.

In order to cope with today’s complex built environment and the enormous variation in the size and scale of construction projects … a ‘flexible’ mix of functional, performance and prescriptive legal requirements is the sharpest and most appropriate instrument.

And you can forget the hype about performance-based building codes coming out of the USA … hot air, and much ado about little !

Of course, the biggest issue of all is the competence of those individuals who work in Authorities Having Jurisdiction (AHJ’s), i.e. technical controllers.  Even in the most developed economies of the world … there are many occasions when the level of individual incompetence in an AHJ is astounding … and institutional arrangements within the AHJ itself are a mess, i.e. the AHJ is not fit for purpose.

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1.  Sustainable Design – Design Process Efficiency & Proper Preparation for Construction

A tremendous amount of waste is associated with and generated by the processes of conventional building design, construction and operation.  There is a more up-to-date and efficient way of doing things … an essential way for Sustainable Design … and it’s called Building Information Modelling (BIM) !

Furthermore … consider, for a moment, just the initial list of Specialist Consultants who will be engaged directly by the Chinese Client when the project’s conceptual design has reached a sufficiently developed stage.  How can all of these individuals and organizations – listed in the revised and agreed Project Design Agreement – obtain accurate and reliable ‘real time’ information about the rapidly evolving project from a central design library / information database … then feed their new work back into the centre without unnecessary delay ?   How, next, can everyone else who needs to know, be updated with the new design input … again, without delay ?   And perhaps, these consultants may also be based in different countries … working in very different time zones …

  • Building Information Modelling (BIM) Consultant
  • Local Design Institute (LDI) … a local architectural practice which will produce the project’s working drawings, handle local spatial planning and building code approvals, carry out site inspections, and deal directly with construction organization(s), etc., etc.
  • Interior Design Consultant
  • Traffic / Parking Analysis Consultant
  • Curtain Wall Consultant (Curtain Wall, Skylights & Special Roof Structures)
  • Retail Market Analysis Consultant
  • Landscape Design Consultant
  • Quantity Surveying & Cost Estimating Consultant
  • Furniture Design Consultant
  • Geotechnical, Civil Engineering & Structural Engineering Consultant (including structural performance under fire and earthquake conditions, resistance to fire-induced progressive damage and disproportionate damage … and also including climate resilience)
  • Acoustic & Audio-Visual Design Consultant
  • Mechanical, Electrical & Plumbing (MEP) Engineering Consultant
  • Integrated Building Automation & Management / Telecom / Security / Networking Consultant
  • Fire & Life-Safety Engineering Consultant
  • Water Feature Consultant
  • Wind Tunnel Test Consultant
  • Kitchen Equipment and Layout Design Consultant
  • Art, Artefact and Accessories Consultant & Procurement Services for Art, Artefacts, and Accessories
  • Tenant Storefront Design Consultant
  • Helicopter Landing Pad Design Consultant
  • Universal Design / Accessibility for All Consultant [including access to the building, electronic, information and communication technologies (EICT’s), and services offered at the hotel … and including fire safety, protection and evacuation for all]

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2.  The ‘Design Professional in Responsible Charge’ !

The Project Design Agreement requests that the Client receive advice on who might be the different Specialist Consultants listed above.  In addition, it will be necessary to demarcate the boundaries within which each Consultant will operate … and, where appropriate, to prescribe a design performance target (see below) for each speciality … which must be ‘realized’ in the completed and occupied building !

Recalling the many previous posts, here on this Technical Blog, concerning NIST’s 2005 & 2008 Recommendations on the 9-11 World Trade Centre Building Collapses in New York City … ‘somebody’ must ensure that the many individuals and organizations listed above – members of the Larger (2nd Stage) Design Team – use consistent design data and assumptions … must co-ordinate design documents and specifications to identify overlaps and eliminate gaps … must serve as ultimate liaison between the Client, the Local Design Institute, AHJ officials, and the Construction Organization(s) … and must ensure that everybody is on the same communication wavelength, and working towards the same objective in a trans-disciplinary manner.

That ‘Somebody’ … the Design Professional in Responsible Charge … must be the Project Design Architect !

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3.  Some Sustainable Design Performance Targets

Actual construction and building user performance shall be carefully (i.e. reliably and precisely) monitored … and independently verified …

A.   Basic Functional Requirements … the Building shall comply with the Basic Requirements for Construction Works – elaborated in Annex I of European Union (EU) Regulation No.305/2011 of the European Parliament and of the Council, of 9 March 2011, laying down Harmonized Conditions for the Marketing of Construction Products and Repealing Council Directive 89/106/EEC.

See my Post, dated 2011-09-13 … https://www.cjwalsh.ie/2011/09/new-eu-construction-product-regulation-3052011-halleluiah/

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B.   Good Indoor Air Quality (IAQ) … Two high-level performance indicators have been developed with the aim of protecting Human Health, and are both now referenced in International Standard ISO 21542: ‘Building Construction – Accessibility & Usability of the Built Environment’ …

      –   Radon Activity (incl. Rn-222, Rn-220, RnD) in a building should, on average, fall within the range of 10 Bq/m3 to 40 Bq/m3, but shall at no time exceed 60 Bq/m3 ;

      –   Carbon Dioxide (CO2) Concentrations in a building should not significantly exceed average external levels – typically within the range of 300 parts per million (ppm) to 500 ppm – and shall at no time exceed 800 ppm.

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C.   Energy Conservation & Efficiency + A ‘Positive Energy’ Return + Assured Building User Thermal Comfort

See my Post, dated 2013-09-10 … https://www.cjwalsh.ie/2013/09/passivhaus-standard-is-not-enough-in-new-building-projects/

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D.   Project-Specific Sustainable Fire Engineering Design Objectives

See my Post, dated 2014-04-20 … https://www.cjwalsh.ie/2014/04/sustainable-fire-engineering-design-targeting-mrv/

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Sick Building Syndrome, ISO 21542:2021 & Indoor Air Quality (IAQ)

Posted by CJ Walsh

2012-05-31 (2021-08-02):  The Revised International Standard  ISO 21542: ‘Building Construction – Accessibility & Usability of the Built Environment’  was published on 1 June 2021.  Many years before, however, a decision was taken to link this Standard directly to the United Nations  Convention on the Rights of Persons with Disabilities  (#CRPD) … specifically now referencing Preamble Paragraph (g) and Articles 9, 10, 11, 12 and 19 in its Introduction.  Reading the document, this linkage looks and feels very naturally like an unbreakable umbilical cord !

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Black and White image showing the Title Page of International Standard ISO 21542: ‘Building Construction – Accessibility & Usability of the Built Environment’, which was published on 1 June 2021.  Click to enlarge.

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ISO 21542 has significantly widened the meaning of the concept #Accessibility4ALL … a normal evolutionary process … in particular, the #FireSafety4ALL Texts.  I wonder, though, how many people would ever have considered  Good Indoor Air Quality  to be on the ‘Accessibility’ Menu ??

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Colour image showing a young child wearing a face mask (#Pandemic #CoronaVirus #CoVID19) … with an accompanying text: ‘Poor Indoor Air Quality Is A Serious Threat’.  Click to enlarge.

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Much lower rates of direct fresh air ventilation … and a dramatic reduction in accidental or unintended air seepage from, or into, buildings (depending on local climate conditions) … all driven by an urgent need to conserve energy and to impose greater energy efficiencies on the energy which is actually consumed … are, once again, one of the main causes of serious health problems for ALL #BuildingUsers …

Building Related Ill-Health:  Any adverse impact on the health of building users – while living, working, generally occupying or visiting a specific building – caused by the planning, design, construction, management, operation or maintenance of that building.

I say “once again” because, in Europe, we have been here before … after the two big oil crises of the 1970’s.

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Anyway … I thought that it would be useful to present a relevant extract from ISO 21542 …

B.8 – INDOOR AIR QUALITY (#IAQ)

Poor indoor air quality, an important factor in relation to Building Related Ill-Health (also known as ‘sick building syndrome’), can cause serious health impairments and severely restrict a person’s participation in everyday activities, e.g. work.

Symptoms and signs may include:

  • irritation of eyes, nose and throat ;
  • respiratory infections and cough ;
  • voice hoarseness and wheezing ;
  • asthma ;
  • dry mucous membrane and skin ;
  • erythema (reddening or inflammation of the skin) ;
  • lethargy ;
  • mental fatigue and poor concentration ;
  • headache ;
  • stress ;
  • hypersensitivity reactions, i.e. allergies ;
  • nausea and dizziness ;
  • cancers.

These symptoms and signs are present in the population at large, but are distinguished by being more prevalent in some building users, as a group, when compared with others.  The symptoms and signs may disappear, or may be reduced in intensity, when an affected person leaves the building.  It is not necessary that everyone in a building should be affected before building related ill-health is suspected.

ISO 16814: ‘Building Environment Design – Indoor Air Quality – Methods of Expressing the Quality of Indoor Air for Human Occupancy’ covers methods of expressing indoor air quality (IAQ) and incorporating the goal of achieving good IAQ into the building design process.  It also covers ventilation effectiveness, harmful emissions from building materials, air cleaning devices, and heating, ventilation and air conditioning equipment.

The indoor pollutants considered in ISO 16814 include human bio-effluents, which have often been the principal consideration in air quality and ventilation design, but also the groups and sources of pollutants which can reasonably be anticipated to occur in the building during its long Life Cycle.

These pollutants, depending on the sources present, may include:

  • volatile organic compounds (#VOC’s) and other organics, such as formaldehyde ;
  • environmental tobacco smoke (#ETS) ;
  • natural radon, consisting of a number of different isotopes, is an invisible radioactive gas, and is found in the soils under buildings, water supplies to buildings and in the air ;
  • other inorganic gases, such as carbon monoxide (#CO), the oxides of nitrogen (NOx), and low-level ozone (smog) which is formed when NOx and VOC’s react in the presence of sunlight ;
  • viable particles, including viruses, bacteria and fungal spores ;
  • non-viable biological pollutants, such as particles of mites or fungi and their metabolic products ;
  • non-viable particles, such as dusts and fibres.

The following Two Performance Indicators of Good Indoor Air Quality, developed with the aim of protecting human health, are recommended:

  1. Radon Activity (including Rn-222, Rn-220, RnD)  in a building should, on average, fall within the range of 10-40 Bq/m3, but should at no time exceed 60 Bq/m3.
  2. Carbon Dioxide (CO2)  concentrations in a building should not significantly exceed average external levels – typically within the range of 300-500 parts per million (#PPM) – and should at no time exceed 800 ppm.

[ While the current CoVID-19 Pandemic lasts … these are Essential ‘Health’ Performance Indicators, as opposed to ‘Safety’ Indicators … and they should be stringently operated and constantly monitored in all building types. ]

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BER Certificates & Poor Indoor Air Quality (III)

Posted by CJ Walsh

2009-02-27:  Energy Labelling of Industrial Products is an essential means of raising consumer awareness about energy efficiency and conservation.  I like being able to wander into an electrical shop anywhere in Ireland, Italy or Turkey, for example … and to compare the energy performance of different makes of washing machines, dishwashers or fridges … and even of apparently similar products in the different countries.

 

I can easily visualize these small industrial products being brought into a test laboratory, and then being put through their paces.  It is a credible system.

 

This is NOT possible, however, with a building.

 

 

EU Directive 2002/91/EC of the European Parliament and of the Council, of 16 December 2002, on the Energy Performance of Buildings … is a short document of 7 Pages.  Its Preamble takes up slightly more than the first 2 Pages, and there is a 1 Page Annex at the rear.  Its language is clear and straightforward (see the example of Article 4 below).

 

[What I fail to understand is how and why the Irish National Legislation which implements the Directive … Statutory Instrument No. 666 of 2006: European Communities (Energy Performance of Buildings) Regulations 2006 … is so clumsy, awkward and full of flaws … offering us yet another example of failed ‘light-touch regulation’.  It may also be unconstitutional.]

 

 

 

The EU Directive has something important to say about Indoor Air Quality …

 

Article 4 – Setting of Energy Performance Requirements

 

1. Member States shall take the necessary measures to ensure that minimum energy performance requirements for buildings are set, based on the methodology referred to in Article 3.  When setting requirements, Member States may differentiate between new and existing buildings and different categories of buildings.  These requirements shall take account of general indoor climate conditions, in order to avoid possible negative effects such as inadequate ventilation, as well as local conditions and the designated function and the age of the building.

 

[Quick flashback to a generation ago … the panic, throughout Europe, to conserve energy in the late 1970’s and early 1980’s led to a dramatic reduction in rates and quantities of direct, natural ventilation to the habitable spaces of buildings.  This, in turn, had an adverse impact on Indoor Air Quality, and led to a sharp rise in Asthma among building occupants.]

 

 

 

In Ireland, today, problems concerning Poor Indoor Air Quality continue to occur … typically during the Winter Heating Season.  There is a natural tendency to keep windows closed and to seal permanent ventilation openings.  Accidental indoor air seepage to the exterior is also being reduced in our newer building stock.

 

Poor Indoor Air Quality, an important factor in relation to building related ill-health (also known as ‘sick building syndrome’), can cause serious health impairments and severely restrict a person’s participation in everyday activities, e.g. work.

 

Symptoms and Signs may include:

–         irritation of eyes, nose and throat ;

–         respiratory infections and cough ;

–         voice hoarseness and wheezing ;

–         asthma ;

–         dry mucous membrane and skin ;

–         erythema (reddening or inflammation of the skin) ;

–         lethargy ;

–         mental fatigue and poor concentration ;

–         headache ;

–         stress ;

–         hypersensitivity reactions, i.e. allergies ;

–         nausea and dizziness ;

–         cancers.

 

 

 

The following 2 Performance Indicators of Good Indoor Air Quality, developed with the aim of protecting human health, are recommended:

 

–         Carbon Dioxide (CO2) concentrations in a building should not significantly exceed average external levels – typically within the range of 300 to 500 parts per million – but should at no time exceed 800 parts per million ;

 

–         Radon Activity (including Rn-222, Rn-220, RnD) in a building should, on average, fall within the range of 10 to 40 Bq/m3 … but should at no time exceed 60 Bq/m3.

 

 

NOTES:

 

The concept of Protecting Human Health is altogether different from the concept of Assessing Risk to Safety.

 

In Ireland, testing for Radon Activity in buildings must take place during the Heating Season, i.e. the months of November through to March.  What is the use of testing during July, for example, when windows will be wide open ?   Who would even think of doing that ?   I wonder.

 

Measurement Uncertainty of the standard Alpha Particle Etched-Track Detector distributed by the Radiological Protection Institute of Ireland (RPII) is as follows:

–         under laboratory conditions: …………………… in the order of …… +/- 10%

–         under tightly controlled site conditions: …. in the order of …… +/- 20%

–         under typical conditions of use: …………….. well in excess of … +/- 30%

 

Unfortunately, until the RPII includes proper statements of Measurement Uncertainty in its Test Reports … our Organization cannot recommend RPII Radon Testing Services, and we will not accept RPII Test Reports as proper evidence of Radon Test Results.

 

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