Type ASL

Ventilation grilles, made of aluminium, with individually adjustable, horizontal blades and diffuser-type front border

Ventilation grille with droplet shaped blades

  • Nominal sizes 225 × 125 – 1225 × 525 mm
  • Volume flow rate range 23 – 2000 l/s or 83 – 7200 m³/h
  • Grille face made of aluminium with anodised finish
  • Diffuser-type front border, 28 mm wide
  • Concealed screw fixing


Optional equipment and accessories

  • Grille face in RAL CLASSIC colours
  • Installation subframe
  • Attachments for volume flow rate balancing and air direction control
  • Spring clip fixing

ASL-A/825×225 00133041_0


  • Application
  • Description

Application

  • Ventilation grille of Type ASL as supply air or extract air variant for comfort zones and industrial zones
  • Directed supply air discharge for mixed flow ventilation
  • Blades are adjustable to meet different local requirements
  • For variable and constant volume flows
  • For supply air to room air temperature differences from –12 to +4 K
  • For installation in walls, sills and rectangular ducts

Special characteristics

  • Individually adjustable blades
  • Diffuser-type front border
  • Concealed screw fixing or spring clip fixing

Nominal sizes

  • Nominal length: 225, 325, 425, 525, 625, 825, 1025, 1225 mm
  • Nominal height: 125, 225, 325, 425, 525 mm


Other dimensions upon request

Variants

Fixing

  • Concealed screw fixing
  • Spring clip fixing

Parts and characteristics

  • Diffuser-type front border
  • Individually adjustable, horizontal blades
  • Factory fitted perimeter seal
  • Vertical centre mullion for nominal lengths over 625 mm

Attachments

  • AG, AS, D, DG: For volume flow rate balancing and for air direction control

Accessories

  • Installation subframe: For the fast and simple installation of ventilation grilles

Construction features

  • Asymmetrically supported blades
  • Front border without holes

Materials and surfaces

  • Border and blades made of aluminium
  • Border and blades anodised, E6-C-0, natural colour
  • P1: Border and blades powder-coated, RAL CLASSIC colour

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

Teknisk 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.

Nominal sizes

225 × 125 to 1225 × 525 mm

Minimum volume flow rate

23 – 685 l/s or 83 – 2466 m³/h

Maximum volume flow rate, with LWA max. 40 dB(A) without attachments

115 – 2000 l/s or 414 – 7200 m³/h

Supply air to room air temperature difference

–12 to +4 K

Volume flow rates apply to supply air


Geometric free area

H L [mm]
H 225 325 425 525 625 825 1025 1225
H Ageo
mm

125

0.013

0.020

0.026

0.033

0.040

0.052

0.066

0.079

225

0.026

0.040

0.054

0.067

0.079

0.106

0.133

0.160

325

 

0.061

0.081

0.099

0.120

0.160

0.200

0.241

425

 

 

 

 

0.161

0.214

0.268

0.323

525

 

 

 

 

 

 

0.336

0.404


Effective air discharge area (supply air)

H L [mm]
H 225 325 425 525 625 825 1025 1225
H Aeff
mm

125

0.014

0.021

0.029

0.036

0.043

0.057

0.072

0.086

225

0.029

0.043

0.057

0.072

0.086

0.114

0.142

0.172

325


0.064

0.086

0.108

0.129

0.172

0.214

0.256

425





0.172

0.228

0.285

0.342

525







0.355

0.427


Effective area of extract air grille

H L [mm]
H 225 325 425 525 625 825 1025 1225
H Aeff
mm

125

0.013

0.019

0.026

0.033

0.040

0.053

0.066

0.080

225

0.027

0.040

0.053

0.066

0.080

0.105

0.133

0.160

325


0.061

0.080

0.100

0.120

0.160

0.200

0.240

425





0.160

0.220

0.270

0.320

525







0.330

0.400


ASL, volume flow rate ranges 00246665_0

× LWA = 40 dB(A) with unrestricted airflow+ LWA = 40 dB(A) with airflow restricted by 50 %

Ventilation grilles, rectangular, made of aluminium, for supply and extract air. Special design with diffuser-type front border. Preferably for wall and sill installation but also suitable for rectangular ducts.

Ready-to-install component which consists of a border and individually adjustable, horizontal blades.

Concealed screw fixing or spring clip fixing, for installation into an installation subframe.

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

Special characteristics

  • Individually adjustable blades
  • Diffuser-type front border
  • Concealed screw fixing or spring clip fixing

Materials and surfaces

  • Border and blades made of aluminium
  • Border and blades anodised, E6-C-0, natural colour
  • P1: Border and blades powder-coated, RAL CLASSIC colour

Technical data

  • Nominal sizes: 225 × 125 to 1225 × 525 mm
  • Minimum volume flow rate (supply air): 23 – 685 l/s or 83 – 2466 m³/h
  • Maximum volume flow rate (supply air), at LWA max. 40 dB(A) without attachments: 115 – 2000 l/s or 414 – 7200 m³/h
  • Supply air to room air temperature difference: –12 to +4 K

Sizing data

  • V _______________________ [m³/h]
  • Δpt _______________________ [Pa]

Air-regenerated noise

  • LWA _______________________ [dB(A)]

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

00130283_0

 Type
ASL       Single grille

 Attachments
A       Without (grille face only)
AG       Damper unit, opposed action blades
AS       Hit and miss damper
D       Air direction control, blades installed at 90° to the front blades, independently adjustable
DG       D combined with AG

 Nominal size [mm]
       L × H

 

 Installation subframe
       No entry: none
A1       With

 Fixing
       No entry: concealed screw fixing
B11       Spring clip fixing

 Exposed surface
       No entry: anodised, E6-C-0, natural colour
P1       Powder-coated, specify RAL CLASSIC colour

       Gloss level
       RAL 9010 50 %
       RAL 9006 30 %
       All other RAL colours 70 %

Order example: ASL-AG/625×225/A1

Attachments

Damper unit, opposed action blades

Nominal size

625 × 225 mm

Installation subframe

With installation subframe

Fixing

Concealed screw fixing

Exposed surface

Anodised, E6-C-0, natural colour


 

Dimensions and weight, Product details

  • Dimensions and weight
  • Product details
ASL, 28 mm wide front border 00204838_0
L Nominal length Vertical centre mullion if L > 625 mm
H Nominal height


The weight table shows the available nominal sizes

ASL

H L [mm]
H 225 325 425 525 625 825 1025 1225
H m
mm kg

125

0.3

0.4

0.5

0.6

0.7

0.9

1.1

1.2

225

0.5

0.6

0.8

0.9

1.1

1.4

1.6

1.8

325


0.8

1.0

1.2

1.4

1.8

2.1

2.5

425





1.7

2.2

2.7

3.1

525







3.2

3.7

Weights apply to ventilation grilles without attachments


Installation examples, Installation details, Commissioning, Basic information and nomenclature

  • Installation examples
  • Installation details
  • Commissioning
  • Basic information and nomenclature
Wall installation 00153780_0

Nominal length over 625 mm: with vertical centre mullion

Installation and commissioning

  • Installation preferably in walls, sills and rectangular ducts
  • Installation with installation subframe is recommended


These are only schematic diagrams to illustrate installation details.

Volume flow rate balancing

When several ventilation grilles are installed on the same duct, it may be necessary to balance the volume flow rates.

  • AG: Damper unit with opposed action blades, adjustable, secured with a locking screw
  • AS: Damper unit with hit and miss damper, adjustable, secured with a locking screw

Air pattern

  • Adjustable blades: Set the air control blades individually or together and depending on the local conditions
  • D, DG: Air control blades, fitted at 90° to the front blades, can be adapted to the local conditions

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

lS [m]

Distance from single grille or horizontal run section (throw distance)

Referenser

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