[Equest-users] Modeling common areas in multi-family

[Michael Campbell via Equest-users]

Hello eQUEST Users,

I have a question regarding modeling common areas in a multifamily building.
I have 4-story residential building.
Floors 2-4 have corridors which are provided with outside air supply.
There are trash rooms, storage rooms, mechanical rooms off these corridors.
These trash rooms, storage rooms, mechanical rooms do not have their own
heating/cooling systems, they are conditioned indirectly by the Corridor
HVAC system.
Trash rooms and mechanical rooms have exhaust systems so i have modeled
this per the design.

So in eQUEST I have modeled these spaces together as a single PSZ system
using the Corridor space as the control zone.
I have modeled the Corridor with its specified outside air CFM supply per
the drawings and I have modeled the trash rooms and mechanical rooms with
their specified exhaust air CFM per the drawings, with exhaust air being
made up via the air handler.
I have thermostat schedules set for the Corridor spaces (heat to 68F and
cool to 78F), but have not used thermostat schedules for the trash rooms,
mechanical rooms, storage spaces.  The reason I excluded thermostat
schedules is because this is a single zone system and these spaces are
essentially "along for the ride".

The issue I am having is that when I review my SS-F reports I am seeing
temperature below 30F at times in the trash rooms.  I would expect that the
temperatures would not be exactly the same as my Corridor since they are
not being directly controlled but I am surprised to see such low
temperatures as 30F and am sure the spaces will not reach these
temperatures in real world conditions.  I am looking for some guidance on
how to best model this scenario.  Any help would be appreciated.

Thank you,
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