Hello all,

Does anyone know exactly what's included in the "Total SYSTEM/ZONE fan (supply, return, exhaust) elec consump (kw)" value in hourly reports? I am having an issue with my model where I have unexpectedly high fan energy use and when I trend the aforementioned point along with the supply and return fan power, the total system/zone fan kW is much greater than the sum of the supply and return fan kW. In some cases 10 times greater. I'm using PVAV system type with enthalpy wheels. I've zeroed out the dP across the wheel because I have a given fan capacity. No fan-powered boxes in the zones. No exhaust fans in the zones. I'm stuck trying to determine where the extra fan energy is coming from.

Any help would be greatly appreciated.

Thanks,
Joe

Joe Bliss