Howdy!
We're working on a hospitality project and are wondering if all of the guest room VTACs are combined or counted individually for this credit? Any advice is much appreciated.
Thanks!
Forum discussion
NC-v4 EAc3: Advanced energy metering
Howdy!
We're working on a hospitality project and are wondering if all of the guest room VTACs are combined or counted individually for this credit? Any advice is much appreciated.
Thanks!
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5910 thumbs up
June 9, 2015 - 10:52 am
The guest room HVAC units contain three energy end uses - heating, cooling and fans. Metering them together or individually will not give you the end uses you need. It will be very difficult and costly to do the necessary metering with these types of systems in this type of project.
Karen Heet
June 19, 2015 - 1:22 pm
Marcus,
Thank you for your reply! But I'm still unclear on how this is calculated. Would all of the guest room VTACs be counted as one energy end-use, or would they be counted individually? If counted as a group, they would constitute 10% of energy use and would need to be metered to attain this credit, which would be costly.
Thanks so much!
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5910 thumbs up
June 19, 2015 - 1:42 pm
Ultimately you would need to meter the VTAC's heating, cooling, and fan end uses for all of them. Yes potentially very costly.
Joshua Radoff
Renewable and Sustainable Energy Specialization Lead, MENVUniversity of Colorado Boulder
LEEDuser Expert
45 thumbs up
July 30, 2015 - 5:26 pm
Marcus,
Following up on this question in the context of a high-rise multifamily building. In our case, the building will likely have one master utility meter and then submeter and bill tenants based on usage. Do you know if the submeters that are used in this context have the ability to further submeter end uses in each unit to a BAS or other system? Or is that why you feel that it's cost prohibitive?
Thanks,
Josh
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5910 thumbs up
July 30, 2015 - 5:38 pm
Hey Josh,
I suppose you could find some submetering equipment that could separate energy end uses. In my experience to do so would be very expensive. Basically you would need to separate the electrical circuits by end use. Depending on certain factors the heating, cooling, fans, DHW and plug loads are probably over 10% for the building as a whole. Maybe pumping, maybe exterior lighting, etc. Each needs to be separately metered and then added together for each unit as well as any common spaces. Sounds like a lot of equipment to me even if most of it is inside the panel boxes.
Joshua Radoff
Renewable and Sustainable Energy Specialization Lead, MENVUniversity of Colorado Boulder
LEEDuser Expert
45 thumbs up
July 30, 2015 - 5:39 pm
Yeah. That's what we thought too. But it essentially means that the credit is more or less of limits for MF projects. That seems too bad.
Thanks for the reply. V helpful.