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?
Tyler Thumma
7GroupLEEDuser Expert
66 thumbs up
December 15, 2021 - 3:39 pm
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.