We are still confused between the two. Correct me if I am wrong. Metering means installing an electricity (and water meter) device that record consumption for the entire project (or whole tenancy space usually) area; whereas submetering means the installation of meters (plural) that record consumption by specific energy components, such as HVAC, lighting, plug loads and process uses. Thus there will be 4 metering devices upstream from the main tenant space meter, right?
What is confusing is the narrative above "you could have a single metering system" that covers all these energy component. Then how would you know how is consumed say for lighting in isolation for the purpose of taking steps for operational energy reduction due to lighting?
Gordon Shymko
PrincipalG. F. Shymko & Associates Inc.
138 thumbs up
November 16, 2010 - 11:42 am
I concur that the nomenclature is confusing. For Case 1, "submetering" essentially means metering of the main energy sources in the tenant space e.g. electricity, natural gas, hot water, chilled water, etc. (Note that with the exception of process, electrical end-uses can be combined into a single meter.) More technically speaking, this is "submetering" relative to the main building meters. In the context of Case 2, "submetering" is the metering of the individual energy uses - notwithstanding that the credit language above calls this "metering", which is arguably incorrect.
Ralf Lehmann
M.Sc. | Dipl.-Ing. (FH) | LEED AP BD&CALPHA Energy & Environment GmbH
19 thumbs up
October 4, 2011 - 10:52 am
Sorry Gordon, but did I get you right.
In a Case 2 project I allways have to meter electricity for Lighting, Plug Loads, Heating, Cooling, etc. separatly. A combiened meter for "all" the electricity consumed by the tenant is not sufficient.
Thanks!