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"Neue ASHRAE-Standards zur Raumluftqualität
Vor wenigen Tagen hat die amerikanische Ingenieurorganisation ASHRAE zwei neue Standards veröffentlicht, die beide das Thema Raumluftqualität behandeln.
Der ASHRAE Standard 62.1-2016 "Ventilation for Acceptable Indoor Air Quality" (Vorausgabe 2013) enthält Anforderungen an minimale Außenluftvolumenströme in Nichtwohngebäuden (zum Beispiel für Büro-, Verwaltungs-, Versammlungsbauten) und Strategien zur Umsetzung einer bedarfsorientierten Lüftung auf Basis von CO2- oder Mischgassensoren.
Der zweite neue Standard hat das Kürzel 62.2-2016 und heißt "Ventilation and Acceptable Indoor Air Quality in Residential Buildings" (Vorausgabe 2013). Darin werden lufttechnische Aspekte (freie und mechanische Lüftung) für kleinere und (neu) auch größere Wohngebäude mit mehr als vier Stockwerken besprochen, die zuvor im Standard 62.1 definiert waren.
Interessant ist der Verweis von ASHRAE auf eine Neuheit in den Standards: "Revision of the definition of “environmental tobacco smoke” (ETS) to include emissions from electronic smoking devices and from smoking of cannabis", heißt es dort - es wurden also die Luftbelastungen durch Tabakrauch um neue Aspekte des Rauchens von Elektrozigaretten und von Canabis ergänzt.
(Dr. Manfred Stahl in cci Zeitung 06/2016)

Zielgruppen
Fachplaner Lüftung und Klima, Hersteller und Anbieter von LüKK-Komponenten und -Systemen, TGA-Anlagenbauer, Gebäudebetreiber, Architekten

Inhalt, Resümee, Bedeutung
Ähnlich wie die europäischen Normen DIN EN 13779 "Lüftung von Nichtwohngebäuden" (2007) und DIN EN 15251 "Eingangsparameter für das Raumklima" (2007) definiert der erstmals 1974 veröffentlichte ASHRAE-Standard 62.1 „Ventilation for Acceptable Indoor Air Quality“ der amerikanischen Ingenieurorganisation ASHRAE Mindest-Außenluftvolumenströme für eine akzeptable Raumluftqualität in Nichtwohngebäuden. Während die EN 13779 und die EN 15251 die wichtigsten europäischen Lüftungsnormen sind, hat der Standard 62.1 den gleichen Stellenwert in Amerika und in vielen asiatischen Staaten, in denen ASHRAE-Standards wie nationale technische Regeln angewendet werden.

ASHRAE schreibt:
First published in 1973 as Standard 62, Standard 62.1 specifies minimum ventilation rates and other measures for new and existing buildings that are intended to provide indoor air quality that is acceptable to human occupants and that minimizes adverse health effects.

Whereas changes to the 2013 edition of the standard primarily focused on usability and clarity, the 2016 edition includes a major change to the scope of the standard by which residential occupancies are moved from Standard 62.1 to Standard 62.2. Other changes to the 2016 edition include the following:
•A revised definition of "environmental tobacco smoke" (ETS) to include emissions from electronic smoking devices and the smoking of cannabis
•Revised operations and maintenance requirements to better align Standard 62.1 with the requirements in ASHRAE/ACCA Standard 180-2012
•New requirements to the Indoor Air Quality Procedure for determining minimum ventilation rates by considering the combined effects of multiple contaminants of concern on individual organ systems
•A change to explicitly allow environmental health and safety professionals to determine whether a lower air class is appropriate for a particular laboratory exhaust system
•A change to allow ventilation to be reduced to zero through the use of occupancy sensors for spaces of selected occupancy types
•Changes related to demand control ventilation to make clear that the standard is intended to be used for calculations for code review and also for physical operation"

ANSI/ASHRAE Standards 62.1 and 62.2 are the recognized standards for ventilation system design and acceptable IAQ. Get the information you need to ensure a project is designed according to the latest requirements.
 

ANSI/ASHRAE Standard 62.1-2016, Published 2016, Number of Pages: 56

Major Scope Changes and More in Standard 62.1-2016

First published in 1973 as Standard 62, Standard 62.1 specifies minimum ventilation rates and other measures for new and existing buildings that are intended to provide indoor air quality that is acceptable to human occupants and that minimizes adverse health effects.

Whereas changes to the 2013 edition of the standard primarily focused on usability and clarity, the 2016 edition includes a major change to the scope of the standard by which residential occupancies are moved from Standard 62.1 to Standard 62.2. Dwelling units are now addressed in Standard 62.2, regardless of building height, while common areas are addressed by Standard 62.1. Other changes to the 2016 edition include the following:

  • A revised definition of "environmental tobacco smoke" (ETS) to include emissions from electronic smoking devices and the smoking of cannabis
  • Revised operations and maintenance requirements to better align Standard 62.1 with the requirements in ASHRAE/ACCA Standard 180-2012
  • New requirements to the Indoor Air Quality Procedure for determining minimum ventilation rates by considering the combined effects of multiple contaminants of concern on individual organ systems
  • A change to explicitly allow environmental health and safety professionals to determine whether a lower air class is appropriate for a particular laboratory exhaust system
  • A change to allow ventilation to be reduced to zero through the use of occupancy sensors for spaces of selected occupancy types
  • Changes related to demand control ventilation to make clear that the standard is intended to be used for calculations for code review and also for physical operation

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ANSI/ASHRAE Standard 62.2-2016, Published 2016, Number of Pages: 48

Major Scope Changes and More in Standard 62.2-2016

The 2016 edition of ANSI/ASHRE Standard 62.2 makes two major changes to scope by including unvented space heaters as a potential contaminant source and by expanding "covered dwellings" to include all multifamily dwelling units. A number of other significant changes are also incorporated. A minimal calculated mechanical ventilation rate is provided for existing buildings, below which installation of whole-house ventilation is not required; a distinction is now made between range hoods and other kitchen ventilation options; new methods are provided for determining an infiltration credit for horizontally attached multifamily dwelling units and for determining requirements for a variety of noncontinuous ventilation strategies; and a maximum short-term relative exposure limit is implemented for the first time.

Standard 62.2 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. As in the previous editions of this standard, there are three primary sets of requirements and a number of secondary ones. The three primary sets involve whole-building ventilation, local demand-controlled exhaust, and source control. The secondary requirements focus on properties of specific items needed to achieve the main objectives of the standard. Standard 62.2 applies to spaces intended for human occupancy within single-family houses and multifamily structures, including manufactured and modular houses. This standard does not apply to transient housing such as hotels, motels, nursing homes, dormitories, or jails.

The standard considers chemical, physical, and biological contaminants that can affect air quality. It does not address thermal comfort requirements, specific pollutant concentration levels, or certain potential pollutant sources such as unvented combustion space heaters and contamination from outdoor sources or from episodic occupant-controlled events such as painting, smoking, cleaning, or other high-polluting events.

Dokumenten ID: cci4811