Hello,

I have two models of the same building, both are reporting unmet heating
hours.

The first is a packaged VAV system with 2 HVAC system definitions:

. Core zones are served by DX coils for cooling and hot water
heating coils

. It is a packaged VAV system with HW reheat

. Perimeter zones have no cooling and HW baseboards

. BEPS report indicates 69.6% of hours with any zone outside of
throttling range

The second is a heat pump system also with 2 HVAC system definitions:

. Core zones are served by DX cooling coils and heat pump for
heating

. It is a ground-source heat pump system

. Perimeter zones have no cooling with HW baseboards

. BEPS report indicates 44.5% of hours with any zone outside of
throttling range

Plant load is satisfied in both cases.

Any thoughts?

Thanks in advance.

Colleen Nelson, LEED-AP