Fancoil Units Design Recommendations
In order to make a proper fancoil unit selection, the whole
air conditioning system must be looked at because sizing a
fancoil unit is not just matching the room load. Other criteria
which must be considered during selection are; the minimum
room load, fresh air requirements, with or without reheat,
2 or 4-pipe system, zone size, flexibility and maximum noise
level in the room, etc.
The cooling capacity which is supplied to the room is the
sum of cooling energy available in the primary air and the
cooling capacity of the fancoil unit. The way the primary
air is supplied to the room determines a great part of the
required fancoil cooling capacity. The fancoil capacity is
defined by the entering and leaving air conditions (P = m
x Cp x T).
The leaving air condition is fixed (to offset the room load)
but the entering air condition is dependent upon the way primary
air is supplied.