The LEED Reference Guide states that entryway systems need to be on the interior of the building or in an interior vestibule. It is recommended that projects pursuing this credit with the intent of using an exterior entryway system (either permanent or rollout) consult the
Identify space requirements for entryway walk-off mats. Review the impact that the required ten-foot entryway systems will have on common areas, lobbies, and other interior spaces adjacent to building entries. Remember that the entryway systems have to be installed at all regularly used entrances from exterior spaces, including entrances from a covered parking garage into the building.
Identify programming requirements for special-use spaces such as high-volume copy rooms (40,000 pages or more per month), laboratories, art rooms, chemical storage, housekeeping areas, and other spaces that may expose occupants to hazardous materials.
If existing systems with CFCsneed to be phased out, there could be a considerable first cost in converting existing systems or purchasing new equipment. However, your first cost will almost always be justified by longer-term energy and maintenance cost savings.
If your project is connected to a district cooling system and you want to show that a CFC phase-out is not economically feasible, engage a qualified, independent third party to prepare an analysis demonstrating that both conversion and replacement will have a net ten-year cost. This is determined by a simple payback calculation that subtracts the ten-year cost savings (from energy and maintenance savings) from the cost of the system replacement or conversion.
If your building is connected to a district cooling system, the chillers in that system, even if outside your project's scope or control, should be CFC-free. If they are not, commit to a plan for phase-out of the refrigerant or replacement of the system equipment within five years of project completion.
If existing equipment uses CFCs and will be retained, prepare a phase-out plan for conversion to an appropriate CFC-free refrigerant or a plan for equipment replacement.
