I'm working on a project that has 160 residential dwelling units and there is some confusion between several engineers in our office on whether or not we can use Table 220.84 (Optional Calculation Demand Factors for Three or More Multi-Family Dwelling Units).
We meet the first two provisions for using the table. 1) No dwelling unit is supplied by more than one feeder and 2) each dwelling unit is equipped with electric cooking equipment. The confusion lies within the third provision. We can't decide if our units have "air conditioning" or not. Our HVAC system is a four-pipe fan coil system. Heating water is provided by a central boiler plant and chilled water is provided by a chiller plant. The boilers, chillers, and associated pumps are common to all dwelling units and are fed electrically from the main switchgear. The only HVAC load that is fed from our dwelling unit panel is a fan coil that consists of a fan, filter, and hot and cold water coils.
Is the fan in the fan coil sufficient to be considered "air conditioning"? Or does "air conditioning" require that the entire dwelling unit air conditioning system be powered from the dwelling unit panel (e.g. heat pump, furnace w/ condensing unit, etc.)?
Any help is appreciated.
We meet the first two provisions for using the table. 1) No dwelling unit is supplied by more than one feeder and 2) each dwelling unit is equipped with electric cooking equipment. The confusion lies within the third provision. We can't decide if our units have "air conditioning" or not. Our HVAC system is a four-pipe fan coil system. Heating water is provided by a central boiler plant and chilled water is provided by a chiller plant. The boilers, chillers, and associated pumps are common to all dwelling units and are fed electrically from the main switchgear. The only HVAC load that is fed from our dwelling unit panel is a fan coil that consists of a fan, filter, and hot and cold water coils.
Is the fan in the fan coil sufficient to be considered "air conditioning"? Or does "air conditioning" require that the entire dwelling unit air conditioning system be powered from the dwelling unit panel (e.g. heat pump, furnace w/ condensing unit, etc.)?
Any help is appreciated.