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I have a high-rise apartment building with a central boiler serving in-unit fan coils for heating and no cooling system. Previously, buildings with no cooling systems had to be modeled with a right-sized cooling coil, if there were more than 150 unmet cooling load hours. But CBECC-Com now let's you model HVAC systems without cooling, even when unmet cooling load hours are greater than 150. However, in this case the proposed building has 0 cooling energy use. My understanding is that this doesn't meet the intent of the ACM which specifies a cooling system must be modeled. What is the guidance on how to deal with these scenarios? Thanks.

I have a high-rise apartment building with a central boiler serving in-unit fan coils for heating and no cooling system. Previously, buildings with no cooling systems had to be modeled with a right-sized cooling coil, if there were more than 150 unmet cooling load hours. But CBECC-Com now let's you model HVAC systems without cooling, even when unmet cooling load hours are greater than 150. However, in this case the proposed building has 0 cooling energy use. My understanding is that this doesn't meet the intent of the ACM which specifies a cooling system must be modeled. What is the guidance on how to deal with these scenarios? Thanks.