Auditorium Displacement Diffuser

Low-velocity, ultra-quiet step-mounted displacement diffuser designed for tiered lecture theatres and auditoria. Ideal for mounting in the vertical face of seating steps, the SMARTEMP ADS-FD delivers high indoor-air-quality performance with minimal draft and efficient thermal stratification.

SKU: ADS-FD Category:
Pickup Locations: All ADA & Paltech branches
Delivery Options: Parcel post / Express post / Courier

The SMARTEMP ADS-FD is purpose-designed for installation in the vertical face of steps or staircases beneath fixed seating in auditoria and lecture theatres. It delivers conditioned air through a perforated metal face using a low-velocity, slightly upward-inclined discharge pattern. As a result, it creates a gentle “lake” of conditioned air at floor level around each occupant. Meanwhile, convective plumes carry heat and contaminants upwards and away from the occupied zone.

The diffuser supplies air at a relatively high temperature, typically around 19°C. It also delivers air at very low velocity (≤ 60 L/(s·m) / 216 m³/(h·m)). Consequently, it minimises draughts at ankle level. Therefore, it is ideal for auditoria, lecture theatres and other performance or education venues where occupant comfort and acoustics are important.

Key Features

  • Standard rectangular face measures 120mm high × 500mm wide. In addition, custom heights from 100mm to 300mm are available.
  • Perforated metal face with round holes arranged in a 60° staggered pattern. Furthermore, bespoke perforation patterns are available on request.
  • Aluminium frame with a powder-coated galvanised steel face. Colour finishes are available to suit project specifications.
  • Ultra-quiet operation with a sound power level (Lw) of ≤15dB(A). As a result, the diffuser delivers virtually silent performance.
  • Fixed horizontal-to-upward discharge pattern. Consequently, it minimises air velocity in the ankle zone while maintaining occupant comfort.
  • Optimised for displacement ventilation. Therefore, it promotes thermal stratification, reduces fan energy consumption, extends the free-cooling operating range and improves overall ventilation effectiveness.

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