ASHRAE Standard 62.1 - Ventilation and Acceptable Indoor Air Quality - TIÊU CHUẨN ASHRAE (Update liên tục)
17 thg 10, 2016 | 18:05

ASHRAE Standard 62.1 - Ventilation and Acceptable Indoor Air Quality - TIÊU CHUẨN ASHRAE (Update liên tục)




Indoor air quality (IAQ) is probably the most commonly discussed aspect of building indoor environmental quality (IEQ). IAQ has direct effects on our health as well as the perception of an acceptable indoor environment. In the United States, ASHRAE Standard 62.1: Ventilation for Acceptable Indoor Air Quality is the most commonly referenced standard to quantify acceptable conditions and appropriate HVAC system design. ASHRAE Standard 62.1 either forms the basis for most mechanical codes or is directly referenced by the codes themselves.

The standard is best known for its regulation of the amount of ventilation air delivered to each space by HVAC systems through its ventilation rate procedure approach to system design. However, the standard covers many other aspects of building design that are less well known and understood. The key aspects of building design that it covers are: outdoor air quality, envelope design and construction, HVAC system construction, concept of air classes, the ventilation rate procedure, the IAQ procedure, the natural ventilation procedure, and operations and maintenance.

Before getting into what the standard covers in detail, it is important to also understand what the standard does not cover. Standard 62.1 does not cover low-rise residential buildings and single-family dwellings—those are covered under the companion Standard 62.2. The standard also does not cover air quality in smoking areas, a change to the standard made in the 2010 update. Likewise in 2010 ventilation requirements for healthcare facilities were removed so that they could be solely referenced in ASHRAE Standard 170: Ventilation for Health Care Facilities. The other major areas that are not covered are the requirements for ventilation of industrial, laboratory, or other specific process driven ventilation requirements.

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.






LINK DOWNLOAD




Indoor air quality (IAQ) is probably the most commonly discussed aspect of building indoor environmental quality (IEQ). IAQ has direct effects on our health as well as the perception of an acceptable indoor environment. In the United States, ASHRAE Standard 62.1: Ventilation for Acceptable Indoor Air Quality is the most commonly referenced standard to quantify acceptable conditions and appropriate HVAC system design. ASHRAE Standard 62.1 either forms the basis for most mechanical codes or is directly referenced by the codes themselves.

The standard is best known for its regulation of the amount of ventilation air delivered to each space by HVAC systems through its ventilation rate procedure approach to system design. However, the standard covers many other aspects of building design that are less well known and understood. The key aspects of building design that it covers are: outdoor air quality, envelope design and construction, HVAC system construction, concept of air classes, the ventilation rate procedure, the IAQ procedure, the natural ventilation procedure, and operations and maintenance.

Before getting into what the standard covers in detail, it is important to also understand what the standard does not cover. Standard 62.1 does not cover low-rise residential buildings and single-family dwellings—those are covered under the companion Standard 62.2. The standard also does not cover air quality in smoking areas, a change to the standard made in the 2010 update. Likewise in 2010 ventilation requirements for healthcare facilities were removed so that they could be solely referenced in ASHRAE Standard 170: Ventilation for Health Care Facilities. The other major areas that are not covered are the requirements for ventilation of industrial, laboratory, or other specific process driven ventilation requirements.

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.






LINK DOWNLOAD

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