Adjustable pattern plug-flow air supply from up to 8 m discharge height in industrial applications for spot cooling/heating and to purge contaminants from work areas.

	Location – above: May be suspended above workspace.
	Plug-flow discharge: Low turbulence, substantially downward airflow to sweep away contaminants and provide spot cooling/heating.
	Adjustable direction:  Air pattern adjustment from slightly inclined to vertically downwards, for draught-free cooling and effective heating.
	Manual adjustment: Manual air pattern direction adjustment.
	Circular face shape: Face diameter ≥ 1.4 x DN. Suitable for plaster board ceilings or freely suspended applications.
	Perforated pattern: Perforated face.
	Metal Face: Galvanised or powder coated metal finish.

Options

	Electric adjustment: Airflow pattern adjustment (upwards for cooling; downwards for heating) by means of electric actuator with 24V AC/DC power supply and 2-10 V analogue control input.  Well suited to supply-to-room temperature differential control for optimised cooling and heating performance, providing effective downward heat penetration and draught-free operation year round.
	Thermal adjustment: Self-acting wax-bulb up/down discharge direction adjustment – no external power source or controls required. Cool supply air is directed upwards providing draught-free air motion, and warm supply air is directed downwards for effective penetration of heat to a low level.

SMARTEMP Radial Plug-flow Diffuser, RPC-AD

Airflow rate 

• 450 – 1800 L/s (1620 – 6480 m³/h) 

Discharge height

• 4.5 – 8 m

Nominal neck sizes​

• DN400
• DN630

Features

• Low-turbulence plug-flow purges contaminants for enhanced IAQ.
• Well suited for spot cooling and heating
• Suspended at approx. 4.5 to 8.0 m above floor level
• Radial discharge pattern for cooling
• Downward discharge pattern for heating
• Stepless air pattern direction adjustment 
• Adjustment by hand, electric actuator or self-acting thermal wax-bulb in the supply air stream

Function

The SMARTEMP Radial Plug-flow Diffuser, RPC-AD, is suitable for industrial applications, from 4.5 m up to 8 m discharge height, to produce a stable plug-flow air pattern from the diffuser to purge contaminants from the work space. The radial/downward direction of the discharge pattern is adjustable (optionally by electric actuator or by means of a self-acting supply air temperature thermal wax-bulb). Suitable for ∆T_supply-room ≥ -6 K when cooling and ≤ +10 K when heating. 

The perforated circular discharge face is made of galvanised steel that may optionally be powder coated. Air is discharged from the perforated face with minimal mixing to produce a relatively low velocity plug-flow air stream. Spot cooling/heating and contaminant purging occur in the airstream primary path. When cooling, a low level occupancy microclimate of higher indoor air quality is created that spreads radially below the diffuser, in which convective currents from heat sources such as occupants, equipment, machinery and lights rise upwards. This draws in higher quality replenishment air from the occupancy microclimate, to envelope the heat sources in cooler, high quality air. Heat and light contaminants stratify at a high level in concentrated form, to be removed from the space. Where heavy contaminants (such as particles) also need to be purged, it is recommended that these by removed at a low level from the space. When heating, the higher quality supply air is discharged vertically downards to floor level.

Due to stratification of heat, relatively large supply-to-return temperature differentials are achievable – dependent on ceiling height – despite the relatively high supply air temperature, thereby minimising fan energy requirements. Energy savings also accrue from the extended free cooling range often achieved by the elevated supply air temperature, as well as from the potential to reduce outdoor airflow rates due to the improved ventilation effectiveness of the plug-flow industrial displacement air pattern.