This credit requires compliance with a varied group of items that cumulatively help keep pollutants out of the indoor air. These requirements include self-closing doors on janitors' closets, MERV 13 filtration on mechanical equipment, and entryway trackoff systems.

Compliance will require the coordination of team members—including the mechanical engineer, architect, plumbing engineer, and contractor—and also impact project design and operations. The basic requirements are:

This credit requires compliance with a varied group of requirements that cumulatively help keep pollutants out of the indoor air. These requirements include self-closing doors on janitors' closets, MERV 13 filtration on mechanical equipment, and entryway trackoff systems.

Compliance will require the coordination of team members—including the mechanical engineer, architect, plumbing engineer, and contractor—and also impact project design and operations. The basic requirements are:

For projects using CFC-based equipment in the tenant space or a central plant, the LEED Reference Guide had recommended development of a CFC phase-out plan, or a qualified third-party audit showing that a phase-out plan is not economically feasible. However, this requirement was removed with LEED addendum issued 5/9/11.

Core-and-shell (CS) projects encompass all equipment within the project scope and LEED boundary, which may include ventilation systems for common areas and any heat pumps installed for tenant spaces. 

This is an easy prerequisite to meet, since installing equipment without CFC-based refrigerants is now standard practice in new construction. Nearly all industrialized nations have signed the Montreal Protocol, which called for a complete phase out of CFC-based refrigerants by 1995, and HCFCs by 2030 in developed countries. As a result, compliant, environmentally preferable refrigerants that comply with this prerequisite are the only option available for new systems. 

This prerequisite focuses on the elimination of CFC-based refrigerants that contribute to ozone depletion in HVAC&R equipment.

This prerequisite focuses on the elimination of CFC-based refrigerants that contribute to ozone depletion in HVAC&R equipment. Although fire suppression systems are covered by EAc4, you're not required to consider them for this prerequisite. Doing so in conjunction with EAc4 is a good idea, however.

This credit promotes efficient, high-performance lighting systems through increased controllability for building occupants. Allowing individuals control over the lighting levels in their workspaces can enhance their comfort, productivity, satisfaction, and overall wellbeing.

Better lighting controls can also increase the efficiency of your lighting system by focusing on task lighting rather than unnecessary ambient lighting, and can reduce energy use due to cooling loads by allowing occupants to turn off lights when leaving their space or when daylight is sufficient.

This credit promotes efficient, high-performance lighting systems through increased controllability for building occupants. Allowing individuals control over the lighting levels in their workspaces can enhance their comfort, productivity, satisfaction, and overall wellbeing.

Better lighting controls can also increase the efficiency of your lighting system by focusing on task lighting rather than unnecessary ambient lighting, and can reduce energy use due to cooling loads by allowing occupants to turn off lights when leaving their space or when daylight is sufficient.