Type VAT

Ventilation grilles, made of aluminium, with individually adjustable, vertical blades

Ventilation grille with droplet shaped blades

  • Nominal sizes 225 × 75 – 1225 × 525 mm
  • Volume flow rate range 11 – 2000 l/s or 40 – 7200 m³/h
  • Grille face made of aluminium with anodised finish
  • Front border, 23 mm or 27 mm wide
  • Concealed screw fixing


Optional equipment and accessories

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

VAT-A/825×225 00137759_0


  • Application
  • Description

Application

  • Ventilation grille of Type VAT 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
  • Front border in two widths
  • Concealed screw fixing, spring clip fixing or countersunk holes
  • Optional installation subframe and casing for the fitting of filter media

Nominal sizes

  • Nominal length: 225, 325, 425, 525, 625, 825, 1025, 1225 mm
  • Nominal height: 75, 125, 225, 325, 425, 525 mm


Other dimensions upon request

Variants

Front border

  • 27 mm wide
  • G11: 23 mm wide


Fixing

  • Concealed screw fixing
  • G11: Concealed screw fixing (23 mm)
  • A11: Countersunk holes (only 27 mm)
  • B11: Spring clip fixing (27 mm)
  • H11: Spring clip fixing (23 mm)

Parts and characteristics

  • Sloped border with chamfered inside edge
  • Individually adjustable, vertical blades
  • Factory fitted perimeter seal

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
  • Filter casing: Frame with filter element and spring clip fixing (only with 27 mm wide front border)

Construction features

  • Asymmetrically supported blades

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 × 75 to 1225 × 525 mm

Minimum volume flow rate

11 – 685 l/s or 40 – 2466 m³/h

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

62 – 2000 l/s or 223 – 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

75

0.007

0.010

0.014

0.017

0.020

0.027

0.034

0.040

125

0.014

0.021

0.028

0.035

0.041

0.055

0.068

0.082

225

0.028

0.042

0.056

0.070

0.083

0.111

0.138

0.166

325

 

0.064

0.084

0.105

0.125

0.166

0.297

0.250

425

 

 

 

 

0.166

0.222

0.278

0.334

525

 

 

 

 

 

 

0.348

0.417


Effective air discharge area (supply air)

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

75

0.007

0.011

0.014

0.018

0.021

0.029

0.036

0.043

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

75

0.006

0.009

0.011

0.014

0.016

0.022

0.028

0.033

125

0.011

0.016

0.022

0.028

0.033

0.044

0.055

0.066

225

0.022

0.033

0.044

0.055

0.066

0.090

0.110

0.134

325


0.050

0.066

0.083

0.100

0.134

0.170

0.200

425





0.134

0.180

0.220

0.270

525







0.280

0.340


VAT, volume flow rate ranges 00246677_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. Aesthetic sloped border with chamfered inside edge Preferably for wall and sill installation but also suitable for rectangular ducts.

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

Concealed screw fixing, spring clip fixing or countersunk holes, for installation into an installation subframe or fixing onto an installation surface.

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

Special characteristics

  • Individually adjustable blades
  • Front border in two widths
  • Concealed screw fixing, spring clip fixing or countersunk holes
  • Optional installation subframe and casing for the fitting of filter media

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 × 75 to 1225 × 525 mm
  • Minimum volume flow rate (supply air): 11 – 685 l/s or 40 – 2466 m³/h
  • Maximum volume flow rate (supply air), at LWA max. 40 dB(A) without attachments: 62 – 2000 l/s or 223 – 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.

Order example: VAT-DG/825×225/A1

Attachments

Damper unit with opposed action blades and air direction control

Nominal size

825 × 225 mm

Installation subframe

With installation subframe for 27 mm wide front border

Fixing

Concealed screw fixing

Exposed surface

Anodised, E6-C-0, natural colour


Order example: VAT-EF/825×225/P1-RAL 9010

Attachments

None

Nominal size

825 × 225 mm

Exposed surface

Powder-coated RAL 9010, pure white


 

Dimensions and weight, Product details

  • Dimensions and weight
  • Product details

The weight table shows the available nominal sizes

VAT

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

75

0.3

0.3

0.4

0.5

0.6

0.7

0.8

1.0

125

0.3

0.4

0.5

0.6

0.7

0.9

1.1

1.3

225

0.5

0.6

0.8

0.9

1.1

1.4

1.7

1.9

325


0.8

1.0

1.2

1.4

1.8

2.2

2.6

425





1.7

2.2

2.7

3.2

525







3.3

3.8

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 00153810_0


Installation and commissioning

  • Installation preferably in walls, sills and rectangular ducts
  • Installation with installation subframe is recommended
  • If no installation subframe is used, the border should be fixed with screws


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)

Nedladdningar

  • produkt information

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