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TRG-TRC014-EN 41
period three
System Configurations
notes
and equipment. Interior spaces on the top floor of a building often need to be
treated as a perimeter space due to the heat gain/loss from the roof.
Each space is typically served by an individual VAV terminal unit, allowing
independent cooling and heating control.
Perimeter Spaces
Before a VAV terminal unit can be selected to serve a perimeter space, the
designer must determine the heating load for that space. This will determine
whether the heating load can be satisfied by supplying warm air through
overhead diffusers or if the heating load must be handled by a separate
perimeter heating system (e.g., baseboard wall fin).
The guideline for heating a perimeter space is based on the skin heat loss per
unit length of perimeter wall.
Perimeter Spaces
perimeter
heating
overhead
heating
Figure 57