Type TRS-K

Ventilation grilles, made of galvanised sheet steel, with individually adjustable, vertical blades, for installation into rectangular ducts

Ventilation grille with droplet shaped blades

  • Nominal sizes 225 × 75 to 1225 × 325 mm
  • Volume flow rate range 11 – 1305 l/s or 40 – 4698 m³/h
  • Grille face made of galvanised sheet steel
  • Front border with countersunk holes, 27 mm wide


Optional equipment and accessories

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

TRS-K/825×225 00135853_0


  • Application
  • Description

Application

  • Ventilation grille of Type TRS-K 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 into rectangular ducts

Special characteristics

  • Individually adjustable blades

Nominal sizes

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


Other dimensions upon request

Variants

  • TRS-K-KA: Grille face with vertical blades
  • TRS-K-KD: Grille face with vertical and horizontal blades, individually adjustable

Parts and characteristics

  • Sloped border with chamfered inside edge
  • Individually adjustable, vertical blades
  • Factory fitted perimeter seal
  • KD: Individually adjustable, horizontal blades for air direction control

Attachments

  • KS, K5: For volume flow rate balancing

Accessories

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

Construction features

  • Asymmetrically supported blades
  • Front border with countersunk holes

Materials and surfaces

  • Border and blades made of galvanised sheet steel
  • 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

Technical information

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

  • Function
  • Technical data
  • Quick sizing
  • Specification text
  • Order code
Schematic illustration of a ventilation grille with transverse blades 00151212_0
① Front border
② Transverse blades


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 × 325 mm

Minimum volume flow rate

11 – 410 l/s or 40 – 1476 m³/h

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

62 – 1305 l/s or 223 – 4698 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

0.011

0.015

0.018

0.022

0.029

0.036

0.043

125

0.015

0.022

0.030

0.037

0.044

0.059

0.074

0.089

225

0.030

0.045

0.060

0.075

0.090

0.119

0.149

0.179

325

 

0.068

0.090

0.113

0.135

0.180

0.225

0.269


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


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


0.033

0.044

0.055

0.066

0.090

0.110

0.134

325



0.066

0.083

0.100

0.134

0.170

0.200


TRS-K, volume flow rate ranges 00246713_0

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

Ventilation grilles, rectangular, made of galvanised sheet steel, for supply and extract air. Aesthetic sloped border with chamfered inside edge Installation preferably in rectangular ducts.

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

Countersunk holes for fixing the grille to the installation surface.

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

Special characteristics

  • Individually adjustable blades

Materials and surfaces

  • Border and blades made of galvanised sheet steel
  • P1: Border and blades powder-coated, RAL CLASSIC colour

Technical data

  • Nominal sizes: 225 × 75 to 1225 × 325 mm
  • Minimum volume flow rate (supply air): 11 – 410 l/s or 40 – 1476 m³/h
  • Maximum volume flow rate (supply air), at LWA max. 40 dB(A) without attachments: 62 – 1305 l/s or 223 – 4698 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.

00136205_0

 Type
TRS-K       Single grille

 Variants and attachments
       Variants
KA       Grille face with vertical blades
KD       Grille face with individually adjustable vertical and horizontal blades for air direction control
       Attachments
KS       Hit and miss damper for TRS-K-KA
K5       Slanting hit and miss damper for TRS-K-KD

 Nominal size [mm]
       L × H

 

 Installation subframe
       No entry: none
A1       With

 Surface
       No entry: galvanised grille face
P1       Powder-coated, specify RAL CLASSIC colour

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

Order example: TRS-K-K5/825×225/A1

Attachments

Damper unit, special hit and miss damper and air control blades

Nominal size

825 × 225 mm

Installation subframe

With

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

TRS-K-KA

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

75

0.4

0.5

0.7

0.8

0.9

1.2

1.5

1.8

125

0.5

0.7

0.8

1.0

1.2

1.6

1.9

2.3

225

0.7

1.0

1.2

1.5

1.8

2.3

2.8

3.3

325


1.3

1.6

2.0

2.3

3.0

3.7

4.4

Weights apply to ventilation grilles without attachments


TRS-K-KD

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

75

0.5

0.6

0.8

1.0

1.1

1.4

1.8

2.2

125

0.6

0.9

1.0

1.3

1.6

2.1

2.5

3.0

225

1.0

1.4

1.8

2.2

2.6

3.4

4.2

5.0

325


1.9

2.5

3.1

3.6

4.7

5.9

7.0

Weights apply to ventilation grilles without attachments


Installation details, Commissioning, Basic information and nomenclature

  • Installation details
  • Commissioning
  • Basic information and nomenclature
Ventilation grille with screw fixing 00151457_0
① Ventilation grille
② Fixing screw (by others)


Installation and commissioning

  • Installation preferably in rectangular ducts
  • Installation with or without installation subframe
  • 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 -S 00152134_0

Attachments -AS, -KS, -RS and Type ASW

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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