agerman's profile - activity

Thanks pflaumingo. That's what I recall as the previous guidance as well. And agreed it's not straightforward and an autosizing function is really necessary. What is curious is that with the latest update, when you try to model any zonal system without a cooling coil CBECC-Com gives you an error and the following guidance (for a FPFC): "Set to 1 Btu/hr if the system has no ChW cooling capacity." I'm still waiting to hear back from the technical team if there's been any changes in their guidance on this. I'll update this forum when I do.

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.