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Andrew Mitchell, P.E.
Mitchell Gulledge Engineering, Inc.
Principal
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Requirements
Case 1. Mechanically ventilated spaces
Mechanical ventilation systems must be designed using the ventilation rate procedure as defined by ASHRAE 62.1-2007, or the applicable local code, whichever is more stringent.Option 1. ASHRAE standard 62.1-2007 or non-U.S. equivalent
Meet the minimum requirements of Sections 4 through 7 of ASHRAE Standard 62.1-2007, Ventilation for Acceptable Indoor Air Quality (with errata but without addenda1). Projects outside the U.S. may use a local equivalent to Sections 4 through 7 of ASHRAE Standard 62.1-2007.OR
Option 2. CEN standards EN 15251: 2007 and EN 13779: 2007
Projects outside the U.S. may earn this prerequisite by meeting the minimum requirements of Annex B of Comité Européen de Normalisation (CEN) Standard EN 15251: 2007, Indoor environmental input parameters for design and assessment of energy performance of buildings addressing indoor air quality, thermal environment, lighting and acoustics; and the requirements of CEN Standard EN 13779: 2007, Ventilation for nonresidential buildings, Performance requirements for ventilation and room conditioning systems, excluding Section 7.3 – Thermal environment, 7.6 – Acoustic Environment, A.16, and A.17.OR
Case 2. Naturally ventilated spaces
Naturally ventilated buildings must comply with ASHRAE Standard 62.1-2007, Paragraph 5.1 (with errata but without addenda1). [Europe ACP: Arbeitsstaettenrichtlinie ASR 5] [Latin America ACP: Engineered Natural Ventilation Systems]Alternative Compliance Paths (ACPs)
Europe ACP: Arbeitsstaettenrichtlinie ASR 5
Projects in Europe may use Arbeitsstaettenrichtlinie ASR 5 or ASR A3.6 as a local equivalent to ASHRAE Standard 62.1-2007, paragraph 5.1.Latin America ACP: Engineered Natural Ventilation Systems
Projects in Latin America may follow the Verification Protocol for Engineered Natural Ventilation Systems in Equatorial Climates and receive a design review and approval from the Colombian Professional Association of Air-conditioning, Ventilation and Refrigeration (ACAIRE).Credit substitution available
You may use the LEED v4 version of this credit on v2009 projects. For more information check out this article.What does it cost?
Cost estimates for this credit
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Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.
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Learn more about The Cost of LEED v4 »Frequently asked questions
Which units should be included in the calculations for this prerequisite?The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
Is outdoor air quality testing required in a space using natural ventilation?The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
For a space designed to be naturally ventilated, can operable windows or vents be used to satisfy the 62.1-2007 requirements?The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
What options are available to projects outside the US to meet this prerequisite?The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
Can LEED 2009 projects elect to follow ASHRAE 62.1-2010 for this prerequisite?The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
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© Copyright U.S. Green Building Council, Inc. All rights reserved.
Requirements
Case 1. Mechanically ventilated spaces
Mechanical ventilation systems must be designed using the ventilation rate procedure as defined by ASHRAE 62.1-2007, or the applicable local code, whichever is more stringent.Option 1. ASHRAE standard 62.1-2007 or non-U.S. equivalent
Meet the minimum requirements of Sections 4 through 7 of ASHRAE Standard 62.1-2007, Ventilation for Acceptable Indoor Air Quality (with errata but without addenda1). Projects outside the U.S. may use a local equivalent to Sections 4 through 7 of ASHRAE Standard 62.1-2007.OR
Option 2. CEN standards EN 15251: 2007 and EN 13779: 2007
Projects outside the U.S. may earn this prerequisite by meeting the minimum requirements of Annex B of Comité Européen de Normalisation (CEN) Standard EN 15251: 2007, Indoor environmental input parameters for design and assessment of energy performance of buildings addressing indoor air quality, thermal environment, lighting and acoustics; and the requirements of CEN Standard EN 13779: 2007, Ventilation for nonresidential buildings, Performance requirements for ventilation and room conditioning systems, excluding Section 7.3 – Thermal environment, 7.6 – Acoustic Environment, A.16, and A.17.OR
Case 2. Naturally ventilated spaces
Naturally ventilated buildings must comply with ASHRAE Standard 62.1-2007, Paragraph 5.1 (with errata but without addenda1). [Europe ACP: Arbeitsstaettenrichtlinie ASR 5] [Latin America ACP: Engineered Natural Ventilation Systems]Alternative Compliance Paths (ACPs)
Europe ACP: Arbeitsstaettenrichtlinie ASR 5
Projects in Europe may use Arbeitsstaettenrichtlinie ASR 5 or ASR A3.6 as a local equivalent to ASHRAE Standard 62.1-2007, paragraph 5.1.Latin America ACP: Engineered Natural Ventilation Systems
Projects in Latin America may follow the Verification Protocol for Engineered Natural Ventilation Systems in Equatorial Climates and receive a design review and approval from the Colombian Professional Association of Air-conditioning, Ventilation and Refrigeration (ACAIRE).Credit substitution available
You may use the LEED v4 version of this credit on v2009 projects. For more information check out this article.XX%
Upgrade to LEEDuser Premium to see how many projects achieved this credit. Try it free »
Got the gist of IEQp1 but not sure how to actually achieve it? LEEDuser gives step-by-step help. Premium members get:
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In the end, LEED is all about documentation. LEEDuser’s Documentation Toolkit, for premium members only, saves you time and helps you avoid mistakes with:
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- Guidance documents on arcane LEED issues.
- Sample templates to help guide your narratives and LEED Online submissions.
- Examples of actual submissions from certified LEED projects.
Which units should be included in the calculations for this prerequisite?The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
Is outdoor air quality testing required in a space using natural ventilation?The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
For a space designed to be naturally ventilated, can operable windows or vents be used to satisfy the 62.1-2007 requirements?The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
What options are available to projects outside the US to meet this prerequisite?The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
Can LEED 2009 projects elect to follow ASHRAE 62.1-2010 for this prerequisite?The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
LEEDuser expert
Andrew Mitchell, P.E.
Mitchell Gulledge Engineering, Inc.
Principal
