Fan coils or unit ventilators are typically installed around the
perimeter of a building, on walls, under windows or suspended in the
ceilings. A mechanical equipment room on each floor is unnecessary.
Perimeter siting provides easy access to outside air. However, in some
cases, architecturally attractive grilles are used or outside air can be
introduced through a central shaft. Perimeter siting also makes it easier to
run coil piping and condensate drain connections to each unit.
Both unit ventilator and fan coil systems have filters and fan drive
components that require periodic maintenance. Service and maintenance could
interrupt occupants. Therefore, ease of access is important when specifying
either of these units.
Ventilation Air
If outside air is required, the unit will often have an outside air
damper that mixes outside air with return air inside the unit cabinet. This
also enables an air economizer cycle where air is used for cooling purposes.
Air intake grilles on a building's exterior provide a path for outside air
to enter the unit.
|
