Hello LEED Community at large. . .
My mechanical engineer is interpreting this Prereq. based on the LEED Reference Guide for ID&C which states on page 148 under Section 4. Implementation, ". . .only HVAC systems built for the project are within the scope of work." "Built for the project" would imply that base building systems that were previously designed and installed at the time of construction of the building - not the TI work - are exempt from the no CFC requirement.
However the information on this site leads me to believe that the existing base building HVAC&R equipment that serves the TI space IS subject to the no CFC requirement.
Help me out! Which interpretation is correct?
Thanks!
Sue Barnett
PrincipalSue Barnett Sustainable Design
151 thumbs up
June 24, 2010 - 10:15 am
I have the same fuzziness as Robin, the reference guide is unclear about base building systems. Please help.
If our project is providing most of the HVAC from dedicated units but the restrooms and hallway have base building HVAC from uncertain equipment....what do we do?
Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11478 thumbs up
July 1, 2010 - 10:07 pm
Hi Sue, I think this question is answered below under the heading "help with interpretation." Let us know if you still have questions after reading this.
Sue Barnett
PrincipalSue Barnett Sustainable Design
151 thumbs up
July 8, 2010 - 2:20 pm
Well not really- I still read the LEED CI 2009 Reference Guide to exclude the base building HVAC.....if it is not in the LEED Scope of Work. I'd like to know if I'm understanding it correctly because your answers indicate that everyone thinks the base building needs to be CFC free. Or in my case- the district heating and cooling system....
Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11478 thumbs up
July 12, 2010 - 10:25 pm
This has not been update for LEED 2009, but you may find it helpful to review the LEED guidelines for district energy.Based on that it seems pretty clear that you are off the hook here.
Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11478 thumbs up
August 10, 2010 - 12:26 pm
John, I had dialogue with a USGBC contact about this, and confirmed that the requirement is, as the language (see above) states, “Zero use of … within the LEED project scope of work.” Under Implementation, the Reference Guide states, “only HVAC systems built for the project are within the scope of work,” even though base building systems are mentioned above that.If the tenant does anything to influence the base building system, then it becomes part of the tenant scope of work, but would appear to otherwise be outside of it.See my related comment below about fire suppression systems.