Type AR

RETURN AIR GRILLES, MADE OF ALUMINIUM, WITH FIXED ANGLED HORIZONTAL BLADES

Single return air grilles

  • Nominal sizes 150 x 100 - 1200 x 600 mm
  • Volume flow rate maximum 1202 l/s or 4327 m³/h
  • Grille face made of aluminium with powder-coat finish
  • Front border, 32 mm wide
  • Visible screw fixing as standard

Optional equipment and accessories

  • Grille face in RAL CLASSIC colours
  • Attachments for opposed blade action volume control
  • Screw fix border and border without punching available
  • APPLICATION
  • DESCRIPTION

Application

  • Ventilation grilles of Type AR as extract air variant for comfort zones and industrial zones
  • Blades at a fixed angle to block view 
  • For variable and constant volume flows
  • For installation in walls, ceilings, and rectangular ducts


Special characteristics

  • Fixed blades
  • Angled front border
  • Countersunk holes


Nominal sizes

  • Nominal length: 150 mm up to 1200 mm (50 mm increments)
  • Nominal height: 100 mm up to 600 mm (50 mm increments)
  • Intermediate sizes upon request

Variants

Front border:

  • AR: 32 mm wide


Fixing:

  • 0: Countersunk holes
  • X: Without holes (border drilling by customer)


Parts and characteristics

  • Angled front border with chamfered inside edge
  • Fixed horizontal blades
  • Factory fitted perimeter seal


Attachments

  • AG: For volume flow control


Construction features

  • 32 mm wide border
  • Fixed angle horizontal blades


Materials and surfaces

  • Border and blades made of aluminium
  • P3: Border and blades powder-coated, RAL9010:20%
  • P6: Powder-coated RAL CLASSIC colour, gloss level:25%


Standards and guidelines

  • Sound power level of the air-regenerated noise measured according to EN:ISO 5135


Maintenance

  • Maintenance-free as construction and materials are not subject to wear
  • Inspection and cleaning to VDI 6022

Technical information

Function, Technical data, Quick sizing, Specification Text, Order code

  • FUNCTION
  • TECHNICAL DATA
  • QUICK SIZING
  • SPECIFICATION TEXT
  • ORDER CODE

Functional description

Ventilation grilles are air terminal devices for the supply air and extract air of ventilation and air conditioning systems. They direct the supply air into the room. Ventilation grilles with adjustable blades allow for adapting the discharge direction to the local conditions. The result is a mixed flow ventilation in comfort zones and industrial zones, with good overall room ventilation.

Induction slows the airflow down, i.e. the airflow velocity decreases as the distance from the grille increases. The distance at which the airflow velocity reaches a certain defined value, e.g. 0.2 m/s, is called throw distance. The supply air jet from wall grilles that are installed near the ceiling achieves a larger throw distance than a free jet (from a grille that is not installed near the ceiling). Single grilles, groups of grilles and continuous horizontal runs all achieve different throw distances.

In cooling mode it is necessary to take account of the jet deviation towards the occupied zone, which increases as the supply air to room air temperature difference increases and the discharge velocity decreases. In heating mode the supply air jet deviates towards the ceiling. This has no negative effect on the airflow velocity in the occupied zone, but it may affect the complete ventilation of the room.

Ventilation grilles, rectangular, made of aluminium, for supply and extract air.
Rectangular profile border.
Preferably for wall and ceiling installation but also suitable for rectangular ducts.
Ready-to-install component which consists of a border and fixed horizontal blades.
Countersunk holes for fixing onto an installation surface.
Sound power level of the air-regenerated noise measured according to EN ISO 5135.

Special characteristics

  • Fixed blades
  • Front border
  • Countersunk holes


Materials and surfaces

  • Border and blades made of aluminium
  • P3: Border and blades powder coat RAL9010:20%
  • P6: Powder coated RAL CLASSIC colour. Gloss level 25%


Technical data

Nominal sizes:: 150 x 100 to 1200 x 600 mm

Maximum volume flow rate (extract air): 1202 l/s or 4327 m³/h at LWA max. 40 dB(A) without attachments:

Sizing data

V _______________________ [m³/h]
Δpt _______________________ [Pa]
Air-regenerated noise LWA _______________________ [dB(A)]

Dimensions and weight, Product details

  • Dimensions and weight
  • PRODUCT DETAILS

Installation details, Basic information and nomenclature

  • INSTALLATION DETAILS
  • BASIC INFORMATION AND NOMENCLATURE

Principal dimensions

L [mm]
Nominal length of the ventilation grille

H [mm]
Nominal height of the ventilation grille

m [kg]
Weight


Nomenclature

LWA [dB(A)]
Sound power level of the air-regenerated noise

V [m³/h] and [l/s]
Volume flow rate

Δpt [Pa]
Total differential pressure


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Contact

Thank you for your message!

Visual contact Visual contact

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Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051