The Water Heating System {0} has the either the Tank and/or Condenser marked as located Inside. The Inside Zone is not a Multifamily occupancy. This cannot be marked as being in a Nonresidential Zone.
At the Plant level of the Tree, DHW tab, either uncheck the Tank/Condenser as being Inside, or select a different Zone location for the given component. It can be either a Multifamily Occupancy or a Multifamily Common area.
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