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LEED v4
Existing Retail
Indoor Environmental Quality

Thermal comfort

LEED CREDIT

Retail-EBOM-v4 EQc3: Thermal comfort 1 point

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SPECIAL REPORT

LEEDuser expert

Melissa Kelly

WSP - Built Ecology
Sustainability Manager

SPECIAL REPORT

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Credit language

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© Copyright U.S. Green Building Council, Inc. All rights reserved.

Intent

To promote occupants’ productivity, comfort, and well-being by providing quality thermal comfort.

Requirements

Establishment

Option 1. ASHRAE 55–2010 [India ACP: Thermal Comfort NBC]

Have a permanent monitoring system to ensure ongoing building performance to the desired comfort criteria, as specified by ASHRAE Standard 55–2010, Thermal Comfort Conditions for Human Occupancy, Section 5.2 or 5.3, with errata, or a local equivalent.

[India ACP: Thermal Comfort NBC]

OR

Option 2. ISO and CEN Standards

Have a permanent monitoring system to ensure ongoing building performance of the desired comfort criteria, as specified by the applicable standard:

  • ISO 7730:2005 Ergonomics of the Thermal Environment, analytical determination and interpretation of thermal comfort using calculation of the PMV and PPD indices and local thermal comfort criteria; and
  • 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, Section A2.

Performance

The monitoring system must meet the following requirements.

  • Continuous monitoring. Monitor at least air temperature and humidity in occupied spaces, at sampling intervals of 15 minutes or less.
  • Periodic testing. Monitor air speed and radiant temperature in occupied spaces. Using handheld meters is permitted.
  • Alarms. An alarm must indicate conditions that require system adjustment or repair.
  • Prompt repair. Specify procedures for adjustments or repairs to be made in response to problems identified.
  • Calibration. All monitoring devices must be calibrated within the manufacturer’s recommended interval.

Alternative Compliance Paths (ACPs)

India ACP: Thermal Comfort NBC

OPTION 1. ASHRAE 55–2010 OR THE NATIONAL BUILDING CODE OF INDIA 2005 (NBC 2005)

Projects in India may meet the desired comfort criteria specified in the following as a local equivalent to ASHRAE 55-2010:

  • For mechanically conditioned buildings, NBC 2005 Part 8, Section 3 - Table 2
  • For naturally conditioned buildings, NBC 2005 Part 8, Section 1 - Table 9
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Frequently asked questions

What’s up with the ISO and CEN standards? Is the credit implementation easier using one of these standards?

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Rating System correction ID# 100002197 removes language about thermal comfort design and thermal comfort control from the Requirements section. How does this impact my project?

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What happened to the IEQ Space Matrix that was available to version 2009 projects? What should I reference to determine how spaces in my building should be categorized for this credit?

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What type of measurement instrument do we need to use to monitor radiant temperature in occupied spaces?

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The LEED Reference Guide states that we need to have at least one temperature sensor in each thermal zone with occupied spaces. What defines a thermal zone for this credit?

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Where should I place humidity sensors?

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Our building is served by both mechanical and natural ventilation systems. How does that impact our approach to this credit?

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My project is a hotel. Can we get credit for guest room thermostats?

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The credit form shows checkboxes for trend graphs (air temperature and humidity) and periodic measurements (air speed and radiant temperature). Do I need to provide supporting documentation for these items?

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See all forum discussions about this credit »

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LEEDuser expert

Melissa Kelly

WSP - Built Ecology
Sustainability Manager

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USGBC logo

© Copyright U.S. Green Building Council, Inc. All rights reserved.

Intent

To promote occupants’ productivity, comfort, and well-being by providing quality thermal comfort.

Requirements

Establishment

Option 1. ASHRAE 55–2010 [India ACP: Thermal Comfort NBC]

Have a permanent monitoring system to ensure ongoing building performance to the desired comfort criteria, as specified by ASHRAE Standard 55–2010, Thermal Comfort Conditions for Human Occupancy, Section 5.2 or 5.3, with errata, or a local equivalent.

[India ACP: Thermal Comfort NBC]

OR

Option 2. ISO and CEN Standards

Have a permanent monitoring system to ensure ongoing building performance of the desired comfort criteria, as specified by the applicable standard:

  • ISO 7730:2005 Ergonomics of the Thermal Environment, analytical determination and interpretation of thermal comfort using calculation of the PMV and PPD indices and local thermal comfort criteria; and
  • 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, Section A2.

Performance

The monitoring system must meet the following requirements.

  • Continuous monitoring. Monitor at least air temperature and humidity in occupied spaces, at sampling intervals of 15 minutes or less.
  • Periodic testing. Monitor air speed and radiant temperature in occupied spaces. Using handheld meters is permitted.
  • Alarms. An alarm must indicate conditions that require system adjustment or repair.
  • Prompt repair. Specify procedures for adjustments or repairs to be made in response to problems identified.
  • Calibration. All monitoring devices must be calibrated within the manufacturer’s recommended interval.

Alternative Compliance Paths (ACPs)

India ACP: Thermal Comfort NBC

OPTION 1. ASHRAE 55–2010 OR THE NATIONAL BUILDING CODE OF INDIA 2005 (NBC 2005)

Projects in India may meet the desired comfort criteria specified in the following as a local equivalent to ASHRAE 55-2010:

  • For mechanically conditioned buildings, NBC 2005 Part 8, Section 3 - Table 2
  • For naturally conditioned buildings, NBC 2005 Part 8, Section 1 - Table 9

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:

  • Calculators to help assess credit compliance.
  • Tracking spreadsheets for materials purchases.
  • Spreadsheets and forms to give to subs and other team members.
  • 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.

What’s up with the ISO and CEN standards? Is the credit implementation easier using one of these standards?

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.)

Rating System correction ID# 100002197 removes language about thermal comfort design and thermal comfort control from the Requirements section. How does this impact my project?

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 happened to the IEQ Space Matrix that was available to version 2009 projects? What should I reference to determine how spaces in my building should be categorized for this credit?

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 type of measurement instrument do we need to use to monitor radiant temperature in occupied spaces?

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.)

The LEED Reference Guide states that we need to have at least one temperature sensor in each thermal zone with occupied spaces. What defines a thermal zone for this credit?

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.)

Where should I place humidity sensors?

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.)

Our building is served by both mechanical and natural ventilation systems. How does that impact our approach to this credit?

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.)

My project is a hotel. Can we get credit for guest room thermostats?

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.)

The credit form shows checkboxes for trend graphs (air temperature and humidity) and periodic measurements (air speed and radiant temperature). Do I need to provide supporting documentation for these items?

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

Melissa Kelly

WSP - Built Ecology
Sustainability Manager

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