Ventilation for Acceptable Indoor Air Quality | Standards Michigan

Ventilation for Acceptable Indoor Air Quality

Many ASHRAE consensus documents are continuously maintained and have 30 to 90 day revision cycles.

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Ventilation for Acceptable Indoor Air Quality

December 11, 2018
mike@standardsmichigan.com
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Michigan State University

The ASHRAE committee writing standards for ventilation and indoor air quality (ASHRAE 62.1) has released another batch of redlines for public review.  These changes are important because they are referenced into ASHRAE 90.1 — Energy Standard for Buildings — and ASHRAE 90.1 is referenced into the International Energy Conservation Code (IECC).  The IECC is incorporated by reference into federal and state energy and air quality laws.

Seven addenda have been posted for public comment and are available at the link below:

 ASHRAE’s Online Standards Action & Public Review

Comments are due December 16 through December 31st.

We encourage subject matter experts in the education facility industry to comment.  We are happy to discuss all standards action in the ASHRAE suite any week day at 11 AM Eastern time.  Use the login credentials at the upper right of our home page.  We also encourage students, faculty and facility management professionals to attend ASHRAE technical committee meetings at its next Winter Conference, January 12-16, 2019 in Atlanta, Georgia.  (LEARN MORE)

Issue: [12-21]

Category Mechanical, Energy, Facility Asset Management

Colleagues: Eric Albert, Richard Robben, Larry Spielvogel


Barry University

Posted November 8, 2018

 

The ASHRAE committee writing standards for ventilation and indoor air quality (ASHRAE 62.1) has released another batch of redlines for public review.  These changes are important because they are referenced into ASHRAE 90.1 — Energy Standard for Buildings — and ASHRAE 90.1 is referenced into the International Energy Conservation Code (IECC).  The IECC is incorporated by reference into federal and state energy laws.

Addendum i.  The current scope of Standard 62.1 contains informative text and is also unclear in the current Section 2.3 regarding when or where additional ventilation requirements apply. This proposed addendum removes informative text that is not scope definition and clarifies when the standard does not provide ventilation rates. A companion Addendum h adds informative text to Informative Appendix G – Application

Addendum L. The natural ventilation procedure has changed over the years in 62.1. It was relocated from Section 5 to Section 6 and became a ventilation procedure. It was recently modified to require mechanical ventilation with certain exceptions….Outdoor Air requirements specified in 6.2.1 have been applied to naturally ventilated buildings, essentially prohibiting purely naturally ventilated buildings in cities that don’t meet national outdoor air standards.   Although this is not the best solution, it prioritizes occupant health and follows national guidelines already
applied to other 62.1 procedures until new methodology is developed….The prescriptive path has been improved by removing the openable area requirement of 4% of net occupiable
floor area and introducing two prescriptive paths for sizing the required openable area that better respond to program in the zone and window type….A four-point definition of a naturally ventilated Engineered System has been developed to require designers to more fully document natural ventilation systems that do not meet prescriptive values.

Addendum t.  This proposed addendum adds a new informative appendix which is a companion to the changes to the Natural Ventilation Procedure. It provides information for application of the new procedure.

Comments on Addendum i are due November 11th.

All ASHRAE redlines are accessible at the link below:

ASHRAE’s Online Standards Action & Public Review.

We encourage subject matter experts in the education facility industry to comment.  We are happy to discuss all standards action in the ASHRAE suite any week day at 11 AM Eastern time.  Use the login credentials at the upper right of our home page.  We also encourage students, faculty and facility management professionals to attend ASHRAE technical committee meetings at its next Winter Conference, January 12-16, 2019 in Atlanta, Georgia.  (LEARN MORE)

Issue: [12-21]

Category Mechanical, Energy, Facility Asset Management

Colleagues: Eric Albert, Richard Robben, Larry Spielvogel

 

 

 


North Dakota State College of Science & Technology

 

 

 

Posted August 1, 2018

The ASHRAE committee writing standards for ventilation and indoor air quality has released another batch of redlines for public review.  These changes are important because they are referenced into ASHRAE 90.1 — Energy Standard for Buildings — and ASHRAE 90.1 is referenced into the International Energy Conservation Code (IECC).  The IECC is incorporated by reference into federal and state energy laws.

Addendum aa. The indoor air quality procedure has a long history going back to the 1981 standard. Weaknesses in the requirements for identifying the contaminants
of concern, identifying concentration limits and exposure periods, and specifying the percentage of building occupants to be satisfied with perceived IAQ. Although the percentage of building occupants to be satisfied with perceived IAQ may be specified, and the standard requires that it be measured; this measurement usually would take place after occupancy so is often ignored or omitted. This proposed addendum adds requirements for designing to specific targets. The target design compounds and mixtures are specifically identified.

Addendum ab. Indoor CO2 has had a prominent place in discussions of ventilation and IAQ for many years. The relevant issues include the impacts of CO2 on building occupants, the use of CO2 to control outdoor air ventilation rates, CO2 monitoring as an indicator of general IAQ conditions and the use of indoor CO2 to estimate building ventilation rates. This proposed addendum adds a new Normative Appendix D, Estimation of Steady-State Indoor CO2 Concentrations Based on Per Person Ventilation Rates and Occupant Characteristics. The purpose is to describe the estimation of steady-state indoor carbon dioxide concentrations for a given per-person outdoor air ventilation rate.

Addendum ac.  Informative Appendix C (Summary of Selected Air Quality Guidelines) in 62.1-2016 was deleted in a previous addendum. This proposed addendum
adds a new Informative Appendix C with content supportive of changes to the Indoor Air Quality Procedure (IAQP).

Comments are due August 27th.

All ASHRAE redlines are accessible on ASHRAE’s Online Standards Action & Public Review.   We encourage our colleagues to comment.

All ASHRAE consensus documents are on the standing agenda of our regular Wednesday, 11 AM Eastern Time, Open Agenda teleconference.  CLICK HERE to log in.   Additionally, we host an monthly online teleconference for building industry professionals in the mechanical engineering discipline that are active in the education facility market.  It should be obvious that we have mastered the stream of technical standards that determine #TotalCostofOwnership in education facilities.  The next teleconference is on August 30th, 11 AM Eastern time.

Mechanical Engineering Codes and Standards

Feel free to log in.

We also encourage students, faculty and facility management professionals to attend ASHRAE technical committee meetings at its next Winter Conference, January 12-16, 2019 in Atlanta, Georgia.  (LEARN MORE)

 

Issue: [12-21]

Category Mechanical, Energy, Facility Asset Management

Colleagues: Richard Robben, Larry Spielvogel

 


Posted May 24, 2018

Beloit College

ASHRAE International has released several addenda to its widely adopted standard — ASHRAE 62 | Ventilation for Acceptable Indoor Air Quality — which 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.  Recently released Addendum i contains significant changes to the scope of this document which are now open for public review and can be accessed  on ASHRAE’s Online Standards Action & Public Review Draft page.  (Click here)

Comments are due May 27th.   ASHRAE invites anyone to comment on the development of ASHRAE 62.1 and any other of its consensus documents.   The ASHRAE suite is a swiftly moving suite which effectively sets the standard of care for environmental air systems in education and healthcare facilities.  Many of its committees meet twice a year at various locations around the US; the next Annual conference to be hosted in Houston, June 23-27.   We encourage workpoint subject matter experts in the Houston area — i.e. design, construction and O&M tradespersons working in education and healthcare campus HVAC shops — to attend this conference and sit in on the meetings of ASHRAE 62.1 (or any other technical committee) to observe how leading practice is discovered.

All ASHRAE consensus documents are on the standing agenda of our regular Wednesday, 11 AM Eastern Time, Open Door teleconference.  Anyone is welcomed to join these teleconferences with the login information below:

https://global.gotomeeting.com/join/718914669

You can also dial in using your phone. United States : +1 (408) 650-3123 Access Code: 718-914-669

Issue: [12-21]

Category Mechanical, Energy, Facility Asset Management

Colleagues: Richard Robben, Larry Spielvogel

 


April 21, 2018

University of North Carolina Chapel Hill

ASHRAE International has released several addenda to its widely adopted standard — ASHRAE 62 | Ventilation for Acceptable Indoor Air Quality — several of which may affect the design, construction and operation of education facilities.  These can be found on Pages 36 through 83 of ANSI Standards Action or at ASHRAE’s Online Standards Action & Public Review Draft page.  (Click here)   The changes are non-trivial; a sample of three of them summarized below:

Addendum g: HVAC requirements for minimally occupied spaces

Addendum h:  The standard may be applied to both new and existing buildings but its provisions are not primarily intended to be applied retroactively when the standard is used as a mandatory regulation or code.

Addendum z: Tabulation of requisite ventilation required at the outdoor air intake for many systems.

There are 15 more changes in the batch most recently released.  These specifics will find their way into construction documents and commissioning agreements and operations and maintenance budgets.

Comments are due April 22nd.   ASHRAE invites anyone to comment on the development of ASHRAE 62.1 on its Online Standards Action & Public Review Draft page.  (Click here).   We will place these on the agenda of our regular Wednesday, 11 AM Eastern Time, Open Door teleconference.  Anyone is welcomed to join these teleconferences with the login information below:

https://global.gotomeeting.com/join/718914669

You can also dial in using your phone. United States : +1 (408) 650-3123 Access Code: 718-914-669

 

Issue: [12-21]

Category Mechanical, Energy, Facility Asset Management

Colleagues: Richard Robben, Larry Spielvogel

Link to our ASHRAE 62.1 Workspace

 


September 5, 2017

University of Michigan Ross School of Business

ASHRAE International has released several addenda to its widely adopted standard — ASHRAE 62 | Ventilation for Acceptable Indoor Air Quality — several of which may affect the design, construction and operation of education facilities:

BSR/ASHRAE Addendum 62.1b-201x, Ventilation for Acceptable Indoor Air Quality (addenda to ANSI/ASHRAE Standard 62.1-2016) This proposed addendum responds to increasing requests for more simplified table for ventilation rate procedure of the standard. It contains a simplified ventilation rate table in Informative Appendix D for use in existing buildings where information for calculating minimum ventilation using Normative Appendix A for multiple spaces is often unavailable.

BSR/ASHRAE Addendum 62.1d-201x, Ventilation for Acceptable Indoor Air Quality (addenda to ANSI/ASHRAE Standard 62.1-2016) This proposed addendum deletes Informative Appendix D (Rationale for Minimum Physiological Requirements for Respiration Air Based on CO2 Concentration). Appendix D first appeared in 62-1989. Its purpose was to explain the relationship between oxygen and carbon dioxide in spaces. It is based on data from the 1950’s. Newer information is available. The committee is aware of misuse and confusion caused by the information in its present form and prefers to delete this misused appendix now. The committee may add back relevant informative guidance that assists with implementation of the standard in the next version of the standard.

BSR/ASHRAE Addendum 62.1f-201x, Ventilation for Acceptable Indoor Air Quality (addenda to ANSI/ASHRAE Standard 62.1-2016) The so-called “Multiple Spaces Equation” is very difficult to use, especially for variable volume systems for which there are an infinite number of scenarios with varying airflow, occupancy, supply air temperature, etc., all of which affect system ventilation efficiency. 62.1 includes two options for calculating system ventilation efficiency, a prescriptive approach using Table 6.2.5.2 and a more fundamental approach in Normative Appendix A. This proposed addendum replaces the table approach with two formulas, one used to determine system ventilation efficiency (Ev) and one used to determine minimum primary airflow setpoint intended to be used for VAV systems.

BSR/ASHRAE Addendum 62.2i-201x, Ventilation and Acceptable Indoor Air Quality in Residential Buildings (addenda to ANSI/ASHRAE Standard 62.2 -2016) This proposed addendum would make explicit that placing a new fan in a kitchen or bathroom in an existing dwelling unit can address the airflow deficit that would otherwise have existed through Section A3. This has been assumed to be true, but has not previously been made explicit. This proposed change would make this condition more transparent to users.

BSR/ASHRAE Addendum 62.2j-201x, Ventilation and Acceptable Indoor Air Quality in Residential Buildings (addenda to ANSI/ASHRAE Standard 62.2 -2016) This proposed addendum would explicitly allow existing buildings to use a branch-circuit overcurrent device as an override even if it is not dedicated to only the ventilation fan in recognition that running a new circuit for the fan in an existing home is not always feasible.

Comments are due October 8th.   ASHRAE invites anyone to comment on the development of ASHRAE 62.1 on its Online Standards Action & Public Review Draft page.  (Click here).   We will place these on the agenda of our regular Wednesday, 11 AM Eastern Time, Open Door teleconference.  Anyone is welcomed to join these teleconferences with the login information below:

https://global.gotomeeting.com/join/718914669

You can also dial in using your phone. United States : +1 (408) 650-3123 Access Code: 718-914-669

 

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