How UfAC works

Underfloor air conditioning (UfAC) systems make use of the plenum beneath a raised access floor to create the air ventilation zone, eliminating the need for ceiling based services and associated duct and pipework.

Each floor is divided into zones of up to 300m2 depending on the potential use and occupancy density of the area.

Each zone is supplied with chilled or warmed air by a zonal air handling unit or CAM (Conditioned Air Module) and the conditioned air is then delivered into the space using a recessed (Fantile) or floor standing fan terminal.

Air travels back to the CAM for re-conditioning either at floor level via the plenum (CAM-C), or at high level (CAM-V). Both CAM-C and CAM-V systems can be configured to be either chilled water (CW) or direct expansion (DX).

System Configurations


AET Flexible Space offers a variety of standard system configurations as well as bespoke hybrid solutions. Zonal systems use downflow units (CAM-C or CAM-V) and air terminals (Fantile).

CAM-C System Configuration

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CAM-C Schematics

CAM-V System Configuration

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CAM-V Schematics

CAM-C System

Fully Underfloor, Supply And Return Air

The CAM-C system makes use of the raised floor void as a plenum for the distribution, and the return of air. Within the floor void, flexible baffle material segregates zones into supply and return plena.

A CAM-C system is the best option for increasing headroom in height restricted buildings and where ceilings may be left exposed to highlight architectural features.

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CAM-V System

Underfloor Supply Air, High Level Return Air

The CAM-V system makes use of the raised floor void as a plenum for the distribution of supply air. Return air is received back to the unit at ceiling or high level.

No division in the floor plenum means the CAM-V system is the best option for flexibility and future reconfiguration.

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