The ASHRAE Standard 90.1 User's Manuals (2004, 2007), pages G-19 and
G-20 describe how to define your zones when using the Building
Performance Rating Method, as required for LEED energy modeling.
Could you be a little more specific with your question. LEED requires/allows you to follow the energy modeling zoning requirements set out in ASHRAE 90.1, App G. But, I doubt that's the answer you're looking for.
Generally, match the HVAC zoning when that's known (typical in my LEED
projects), combining the zones where they are significantly similar in
system type and internal/external loads/surfaces. When you don't know
the HVAC zoning, 90.1 allows for simplified "perimeter/core" zoning with
some common-sense restrictions. As Bill suggested, 90.1 user's manual
spells out both approaches with brevity.
Alternatively, you might read the entry "Zones for Buildings Without
HVAC Systems" in the DOE-2 help files that came with your eQuest
installation.
Chris,
The ASHRAE Standard 90.1 User's Manuals (2004, 2007), pages G-19 and
G-20 describe how to define your zones when using the Building
Performance Rating Method, as required for LEED energy modeling.
Regards,
William Bishop, PE, BEMP, LEED(r) AP
Could you be a little more specific with your question. LEED requires/allows you to follow the energy modeling zoning requirements set out in ASHRAE 90.1, App G. But, I doubt that's the answer you're looking for.
Generally, match the HVAC zoning when that's known (typical in my LEED
projects), combining the zones where they are significantly similar in
system type and internal/external loads/surfaces. When you don't know
the HVAC zoning, 90.1 allows for simplified "perimeter/core" zoning with
some common-sense restrictions. As Bill suggested, 90.1 user's manual
spells out both approaches with brevity.
Alternatively, you might read the entry "Zones for Buildings Without
HVAC Systems" in the DOE-2 help files that came with your eQuest
installation.
NICK CATON, E.I.T.