A question about pressure drop credit calculation:
Table 6.5.31.1B lists the pressure drop adjustment values. My example is a zonal system (fan coils, heat pumps, etc.). Outdoor air is ducted from an ERV make-up air system to each zonal system. The make-up air system has a heat recovery device and a MERV 13 filter. Does one take credit for the devices on the make-up air system when calculating the baseline fan power for the respective systems?

As only a fraction of the supply flow of the zonal systems comes from the make-up air system, it seems inappropriate to take credit for devices on the make-up air system?

Christopher Jones, P.Eng.
Tel: 416.644.4226 ? Toll Free: 1.888.425.7255 x 527

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