Type SL

Ventilation grilles, made of sheet steel, with individually adjustable, horizontal blades and diffuser-type front border – also for horizontal runs

Single ventilation grilles and horizontal run sections with droplet shaped blades

Nominal sizes 225 × 125 – 1225 × 525 mm and horizontal run sections
Volume flow rate range 23 – 2000 l/s or 83 – 7200 m³/h
Grille face made of sheet steel, powder-coated
Diffuser-type front border, 28 mm wide longitudinal section, 20 mm wide transverse section
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

SL-A/825×225 00132562_0

SL-A/825×225

Application

Ventilation grille of Type SL 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

Nominal sizes

Single grille

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

Horizontal run section

Nominal length of end section: 950 – 1970 mm, intermediate dimensions in 60 mm increments
Nominal length of middle section: 2000 mm
Nominal height: 125, 225, 325 mm

Variants

SL: Single grille
E-SL, M-SL: Horizontal run section

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
Filter casing: Frame with filter element and spring clip fixing

Construction features

Asymmetrically supported blades
Front border without holes

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

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 longitudinal blades

① Front border
② Longitudinal blades
③ Centre mullion

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
Horizontal run section	H: 125, 225, 325 mm
Minimum volume flow rate	23 – 685 l/s or 83 – 2466 m³/h
Maximum volume flow rate, with L_WA 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

Volumen flow rates for single grille for supply air.

Geometric free area

H	L [mm]
H	225	325	425	525	625	825	1025	1225
H	A_geo
mm	m²
125	0.015	0.022	0.029	0.036	0.044	0.058	0.072	0.087
225		0.044	0.059	0.074	0.089	0.117	0.147	0.176
325			0.096	0.126	0.156	0.177	0.221	0.266
425					0.178	0.236	0.296	0.355
525							0.370	0.445

Effective air discharge area (supply air)

H	L [mm]
H	225	325	425	525	625	825	1025	1225
H	A_eff
mm	m²
125	0.014	0.021	0.029	0.036	0.043	0.057	0.072	0.086
225		0.043	0.057	0.072	0.086	0.114	0.142	0.172
325			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	A_eff
mm	m²
125	0.013	0.019	0.026	0.033	0.040	0.053	0.066	0.080
225		0.040	0.053	0.066	0.080	0.105	0.133	0.160
325			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

SL, volume flow rate ranges 00246695_0

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

Sizing example

Given data

V = 335 l/s (1206 m³/h)

Ventilation grilles, made of steel, with adjustable blades

Maximum sound power level of 40 dB(A), with the airflow restricted by 50 %

Nominal height as low as possible

Quick sizing

Type SL or TR

Nominal sizes: 825 × 225, 525 × 325, 625 × 425

Selected: SL/825 × 225

Ventilation grilles, rectangular, made of sheet steel, 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 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

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

Technical data

Nominal sizes: 225 × 125 to 1225 × 525 mm
Horizontal run section, height: 125 – 325 mm
Minimum volume flow rate (supply air): 23 – 685 l/s or 83 – 2466 m³/h
Maximum volume flow rate (supply air), at L_WA 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]
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
SL 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
M1 With

Exposed surface
No entry: powder-coated RAL 9010, pure white
P1 Powder-coated, specify RAL CLASSIC colour

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

Order example: SL-AG/825×225/M1

Attachments	Damper unit, opposed action blades
Nominal size	825 × 225 mm
Installation subframe	With
Exposed surface	Powder-coated RAL 9010, pure white

Order example: E-SL/1430×225

Section	End section
Attachments	None
Nominal size	1430 × 225 mm
Installation subframe	Without
Exposed surface	Powder-coated RAL 9010, pure white

Order example: SL-EF-AS/1025×125

Attachments	Hit and miss damper
Nominal size	1025 × 125 mm
Exposed surface	Powder-coated RAL 9010, pure white

Dimensions and weight, Product details

SL, front border width 28 mm (L) and 20 mm (H)

L Nominal length Vertical centre mullion if L > 625 mm
H Nominal height

The weight table shows the available nominal sizes

SL, single grille

H	L [mm]
H	225	325	425	525	625	825	1025	1225
H	m
mm	kg
125	0.6	0.8	1.0	1.2	1.3	1.7	2.1	2.4
225		1.2	1.5	1.7	2.0	2.5	3.0	3.6
325			2.0	2.3	2.7	3.4	4.0	4.7
425					3.3	4.2	5.0	5.9
525							6.0	7.0

Weights apply to ventilation grilles without attachments

SL, horizontal run section

H	Section
H	E	M
mm	kg/m	kg
125	2.0	4.0
225	3.0	6.0
325	4.0	8.0

Middle section M: 2000 mm

End section E: 950 – 2025 mm in increments of 1 mm

Weights apply to sections without attachments

Front border M1 – longitudinal section (L)

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

Wall installation 00153795_0

Nominal length over 625 mm: with vertical centre mullion

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

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)

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