TRS

TRS-A/825×225

Ventilation grilles, made of sheet steel, with individually adjustable, vertical blades

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 sheet steel, powder-coated
Front border with countersunk holes, 27 mm wide

Optional equipment and accessories

Grille face in RAL CLASSIC colours
Grille face made of galvanised sheet steel, without powder coating
Installation subframe
Installation subframe for fitting filter media
Attachments for volume flow rate balancing and air direction control
Concealed screw fixing

Initialize order code

Application

Application

Ventilation grille of Type TRS 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
Countersunk holes or concealed screw fixing
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 mm

Other dimensions upon request

Description

Variants

Fixing

Countersunk holes
C11: Concealed screw fixing

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

Construction features

Asymmetrically supported blades
Border with countersunk holes or concealed screw fixing

Materials and surfaces

Border and blades made of galvanised sheet steel
Border and blades powder-coated RAL 9010, pure white
P1: Border and blades powder-coated, RAL CLASSIC colour
S7: Border and blades made of galvanised sheet steel, not powder-coated

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

Schematic illustration of a ventilation grille with transverse blades

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 L_WA 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	A_geo
mm	m²
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	A_eff
mm	m²
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	A_eff
mm	m²
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, volume flow rate ranges 00246707_0

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

Ventilation grilles, rectangular, made of sheet steel, 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 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
Countersunk holes or concealed screw fixing
Optional installation subframe and casing for the fitting of filter media

Materials and surfaces

Border and blades made of galvanised sheet steel
Border and blades powder-coated RAL 9010, pure white
P1: Border and blades powder-coated, RAL CLASSIC colour
S7: Border and blades made of galvanised sheet steel, not powder-coated

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 L_WA 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]
Δp_t _______________________ [Pa]

Air-regenerated noise

L_WA _______________________ [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.

Type
TRS 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: countersunk holes
C11 With concealed screw fixing

Exposed surface
       No entry: powder-coated
       RAL 9010, pure white
P1       Powder-coated, specify RAL CLASSIC colour
S7       Grille face made of galvanised sheet steel, without powder coating

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

Order example: TRS-DG/825×225/A1/C11

Attachments	Damper unit with opposed action blades and air direction control
Nominal size	825 × 225 mm
Installation subframe	With
Fixing	Concealed screw fixing
Exposed surface	Powder-coated RAL 9010, pure white

Order example: TRS-EF/825×225

Attachments	None
Nominal size	825 × 225 mm
Exposed surface	Powder-coated RAL 9010, pure white

Dimensions and weight, Product details

TRS, 27 mm wide front border 00204904_0

L Nominal length
H Nominal height

The weight table shows the available nominal sizes

TRS

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

Front border, 27 mm

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

Wall installation 00153805_0

Ventilation grille with concealed screw fixing

① Installation subframe
② Concealed screw fixing
③ Ventilation grille

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 -*G

Attachments -AG, -DG and Types AGW, DGW

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

L_WA [dB(A)]

Sound power level of the air-regenerated noise

V [m³/h] and [l/s]

Volume flow rate

Δp_t [Pa]

Total differential pressure

l_S [m]

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

Downloads

product information

Product data sheet Type TRS

Product data sheet 1,9 MB pdf

certificates

Declaration of hygiene conformity Type TRS

TRS_HC_2024_05_DE_en Hygiene certificate 1000 KB pdf
Non-CE Manufacturer's statement TRS

TRS_NotCE_2022_02_08_14_33_43_DE_en Certificate 1 MB pdf

operation manuals

Installation manual Air grilles

IM_2019_06_A00000054451_Lüftungsgitter_V3_GB_en Installation manual 680 KB pdf

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