See all forum discussions about CI-v4 EAc3
 Subscribe to new posts about CI-v4 EAc3 Post a new question aboutCI-v4 EAc3
See LEEDuser’s guidance on CI-v4 EAc3»
FAQs about EAc3 :

We are proposing to metering a new building with a single controller. The controller has the capability to monitor each individual end use (lighting, plug loads, HVAC, water, gas, etc.). Can we meter everything on a distribution board except one specific

View answers »

Forum discussion

CI-v4 EAc3:Advanced energy metering

Fan Powered Box Metering Category

Default Avatar
Daniel Thien
Purdy-McGuire, Inc.
LEEDuser Premium Member
3 thumbs up

We have a building that uses fan-powered boxes with integral electric heaters to serve each zone.  The fan-powered boxes come from the manufacturer with one electrical connection point, and the fan and electric heater are prewired to that connection point.  So only one circuit per box.  For metering, would this be considered "heating" since that is the main power use of the circuit?  The fans are fractional at 1/2 hp max each box.

On the energy model, I assume that this load would need to be modeled using the same category of "heating", and nothing under "interior fans".  Thoughts?

0
Post a reply

You rely on LEEDuser. Can we rely on you?

LEEDuser is supported by our premium members, not by advertisers.

Go premium for $15.95  »

Wed, 12/15/2021 - 20:39

For the advanced metering credit, it would be acceptable to combine the fan and heat from the fan-powered boxes as heating. The AHU fans would need to be separately metered, assuming the modeled fan energy represents at least 10% of the total. The energy model should not need to be modified, unless you were attempting to calibrate the model for measurement and verification using the metered energy use.

Add new comment

To post a comment, you need to register for a LEEDuser Basic membership (free) or login to your existing profile.