Enhanced indoor air quality strategies | U.S. Green Building Council
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LEED O+M: Existing Buildings | v4 - LEED v4

Enhanced indoor air quality strategies

Possible 2 points

Submittal Tips (click to expand)

EQ Credit: Enhanced Indoor Air Quality Strategies

Option 1. Entryway Systems
  • Ensure that all regularly used exterior entrances have installed entryway systems at least 10 feet long in the direction of travel, including the main building entrance as well as building entryways attached to parking structures, underground parking garages, underground pathways, or outside spaces (including loading docks).
  • Remember that typical building carpeting is not an acceptable permanent entryway system.
Option 2. Filtration
  • Be sure that the form narrative specifies the manufacturer recommended schedule for maintenance and replacement of the filtration media, and confirms that the media is replaced according to this schedule.
  • Be sure to include a narrative or activity logs to demonstrate that filters were maintained during the performance period per the maintenance plan outlined in the Establishment section of this form.
Option 2. Carbon Dioxide Monitors
  • Ensure that CO2 sensors are configured to trend CO2 concentrations in intervals no greater than 30 minutes.
  • CO2 sensors must be in all densely occupied spaces, and must be between 3 and 6 feet above the floor. Rooms smaller than 150 square feet (14 square meters) are exempt.
  • Ensure that the narrative in the form summarizes the maintenance plan in place for all CO2 monitors, and that the plan includes regular testing and calibration of carbon dioxide sensors at least once every five years or per the manufacturer’s recommendation, whichever is more frequent.
  • Remember that a narrative or activity logs are required to document that CO2 sensors were maintained per the maintenance plan outlined in the Establishment section.
  • Ensure that the carbon dioxide trending data provided covers a full 24-hour period to demonstrate that carbon dioxide trending is in place and is used to monitor carbon dioxide concentration.
Option 2. Outdoor Air Monitoring for Mechanically Ventilated Spaces
  • Ensure that the controls drawing sample or list of each of the outdoor air monitoring devices demonstrates that the outdoor air flow monitoring devices meet the credit requirements, as outlined in the Establishment and Further Explanation sections of this credit in the LEED O+M v4 Reference Guide.
  • Ensure that the maintenance documentation (e.g., activity logs, narrative, etc.) demonstrates that airflow monitoring devices were maintained per the maintenance plan outlined in the Establishment section and confirms whether any devices were calibrated during the Performance Period.
  • Ensure that the control system is configured to generate an alarm visible to the system operator if the outdoor airflow value varies by 15% or more from the outdoor airflow setpoint.
  • It is only necessary to demonstrate compliance for one of the additional enhanced IAQ strategies listed under Option 2 on the Credit Form. Exemplary performance may be achieved if compliance with two or more additional enhanced IAQ strategies listed under Option 2 are demonstrated.
Option 2. Outdoor Air Monitoring for Naturally Ventilated Spaces
  • Option 2. Alarmed Openings for Naturally Ventilated Spaces