Under-seat floor swirl diffuser with rearward inclined air pattern, for location in halls, auditoria and lecture theatres.

Airflow is directed rearwards, away from the sensitive leg region of seated occupants.

Quiet, adjustable damper with settings for 40%, 60%, 80% and 100% airflow.

	Location – below: Air supply from beneath seats.
	Displacement airflow: 5 – 17 L/s (18 – 61 m³/h) Nominal diameter: DN200
	VAV dependent throw: horizontal coverage dependent upon VAV flow rate.
	Adjustable direction/pattern: inclined discharge rotatable to direct airflow rearwards, away from legs of seated occupants.
	Manual adjustment: rotation of air direction is manual.
	Circular face shape: 200 mm nominal diameter round floor swirl face, plus mounting flange.
	Radial face pattern: substantially radially aligned outer slots.
	Concentric face pattern: concentric inner slots.
	Plastic face: Polycarbonate, dyed grey or to colour of choice.

Options

Metal face: shot-blasted (optionally powder-coated) or polished cast aluminium finish.

SMARTEMP Auditorium Floor Swirl Diffuser ASF-AD

Available in selected markets as the LTG Boden-Drallauslass ILB

Smarter Design / Smarter Engineering / SMARTAIR DIFFUSION™

The SMARTEMP Auditorium Floor Swirl Diffuser, type ASF-AD, is a high induction, low air velocity, directional floor swirl diffuser for draught-free air supply with rapid air temperature equalisation from beneath auditorium or lecture theatre seating.

Occupant thermal comfort and indoor air quality are enhanced by the provision of displacement airflow to the low level occupancy microclimate. Heat and contaminants, which rise from occupants as plumes of natural convection, accumulate in a high level stratified layer where they are removed from the space in concentrated form. Occupants are enveloped in a cocoon of high indoor air quality and enhanced thermal comfort.

The inclined air pattern is to be directed towards the rear to counteract the natural tendency for cool ankle-level air to cascade down sloping or tiered applications. This is especially beneficial in steeply raked auditoria, such as lecture theatres and sports arenas. The rearward incline pattern, furthermore, minimises the draught threat in the sensitive ankle and leg regions of seated occupants. Rotation of the inclined air pattern allows draught-free comfort for seated occupants to be achieved even when the diffuser is somewhat off-set from directly beneath a seat (eg due to structural constraints), as this allows the supply air stream to be directed away from gaps between the seats.

An adjustable damper allows the diffuser airflow rate to be individually adjusted in steps. Damper adjustment is especially important in tiered or sloped auditoria, which typically require 20% increased airflow towards the auditorium rear, which is raised and hence warmer, and 20% less air towards the front, which would otherwise be over-cooled as a result of additional cool airflow gently cascading down the steps. Damper adjustment in steps achieves quite damper operation for all damper settings.

The aesthetically appealing flush face design is available in textured plastic or surface treated aluminium. Grey plastic or shot-blasted aluminium finishes are standard, with colour options of dye or powder coating available, respectively. The SMARTEMP ASF-AD diffuser is supplied with a mounting (trim) ring that is suitable for use in pressurised plenum applications. A rapid mount assembly feature provides quick and easy installation or relocation without the need for tools or for access from below.

SMARTEMP Auditorium Floor Swirl Diffuser ASF-AD

Available in selected markets as the LTG Boden-Drallauslass ILB

Smarter Design / Smarter Engineering / SMARTAIR DIFFUSION™

Unique inclined swirl discharge pattern:

• Directs supply air rearwards, away from the sensitive leg region of seated occupants.
• Stabilises cool occupancy microclimate, preventing cascade-effect down tiered seating.
• Allows air to be directed towards the underside of seats even if diffusers are off-set from seat centres, preventing draughts between seats.

SMARTEMP ASF-AD patent applications and granted patents are listed at smartemp.com/patents.

SMARTEMP Auditorium Floor Swirl Diffuser ASF-AD

Available in selected markets as the LTG Boden-Drallauslass ILB

Smarter Design / Smarter Engineering / SMARTAIR DIFFUSION™