reduce ozone depletion and support early compliance with the
Montreal Protocol while minimizing direct contributions to global
Option 1 - Do not use refrigerants.
Option 2 - Select refrigerants and HVAC&R that minimize or
eliminate the emission of compounds that contribute to ozone
depletion and global warming. The base building HVAC&R
equipment shall comply with the formula provided for this credit,
which sets a maximum threshold for the combined contributions to
ozone depletion and global warming potential.
AND - Do not install fire suppression systems that contain
ozone-depleting substances (CFCs, HCFCs or Halons).
- Complete the Template calculations early in design if
considering more than one refrigerant.
- Consider non-refrigerant based cooling such as evaporative
cooling in dry climates.
- Small HVAC units that are used to cool equipment support rooms,
such as computer, telephone and data rooms, are not considered part
of the base building system and are not subject to the requirements
of this credit.
- Evaporative cooling is a solution for dry climates that
eliminates the need for refrigeration equipment.
- 55% of all California LEED Certified projects achieved this
credit under LEED v2.1.
Additional EDR Resources
Briefs: Integrated Design for Small Commercial HVAC
Briefs: Air Conditioning & Ventilation
Design Briefs: Improving Mechanical System Energy
Integrated Building Design
Chiller Plant Efficiency
Design Briefs: Radiant