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Hi @ali raad

For those zones with multiple fan coil units, I would suggest modeling both the fan coil units as a single component in EnergyPlus. You should be able to add the capacities of the coils for all the FCUs in a zone to size the coil of the aggregated coil. If you are autosizing, then you need not worry about adding up the coil capacities.

With regard to unmet cooling loads, I suggest that you thoroughly verify all your internal gains, envelope properties and all schedules. This issue most commonly occurs when the Schedules for internal gains and thermostats do not match. If you still have unmet cooling loads after all the checks, then you should verify that your model is using accurate cooling capacities and that all the cooling components are actually operating when desired.

Hope that helps, Raghu

For those zones with multiple fan coil units, I would suggest modeling both the fan coil units as a single component in EnergyPlus. You should be able to add the capacities of the coils for all the FCUs in a zone to size the coil of the aggregated coil. If you are autosizing, then you need not worry about adding up the coil capacities.

With regard to unmet cooling loads, I suggest that you thoroughly verify all your internal gains, envelope properties and all schedules. This issue most commonly occurs when the Schedules for internal gains and thermostats do not match. If you still have unmet cooling loads after all the checks, then you should verify that your model is using accurate cooling capacities and that all the cooling components are actually operating when desired.