AWT

AWT-A/825×225

Ball impact resistant ventilation grille made of aluminium, with fixed horizontal blades

Ventilation grille with special profiled blades (rectangular cross section)

Nominal sizes 325 × 125 – 1225 × 325 mm
Volume flow rate range 17 – 950 l/s or 61 – 3420 m³/h
Grille face made of aluminium with anodised finish
Tested for installation in gymnasiums
Front border with countersunk holes, 30 mm wide

Optional equipment and accessories

Grille face in RAL CLASSIC colours
Installation subframe

Initialize order code

Application

Application

Type AWT ventilation grille to be used for supply air or extract air
For gymnasiums
Meets the requirements for impact resistance of DIN 18032, part 3
Directed supply air discharge for mixed flow ventilation
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

Fixed blades
Countersunk holes

Nominal sizes

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

Other dimensions upon request

Description

Parts and characteristics

Rectangular profile border sections with rounded edges
Fixed 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

Robust blades
Front border with countersunk 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

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	325 × 125 to 1225 × 325 mm
Minimum volume flow rate	17 – 275 l/s or 61 – 990 m³/h
Maximum volume flow rate, with L_WA max. 40 dB(A) without attachments	95 – 950 l/s or 342 – 3420 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	325	425	525	625	825	1025	1225
H	A_geo
mm	m²
125	0.013	0.018	0.023	0.028	0.037	0.047	0.057
225	0.031	0.042	0.054	0.065	0.087	0.109	0.132
325		0.066	0.084	0.102	0.136	0.171	0.206

Effective air discharge area (supply air)

H	L [mm]
H	325	425	525	625	825	1025	1225
H	A_eff
mm	m²
125	0.015	0.020	0.025	0.031	0.040	0.050	0.060
225	0.031	0.040	0.050	0.060	0.078	0.097	0.116
325		0.060	0.073	0.086	0.116	0.152	0.174

Effective area of extract air grille

H	L [mm]
H	325	425	525	625	825	1025	1225
H	A_eff
mm	m²
125	0.011	0.015	0.018	0.023	0.029	0.036	0.043
225	0.023	0.029	0.036	0.043	0.057	0.071	0.078
325		0.043	0.052	0.063	0.083	0.104	0.122

AWT, volume flow rate ranges 00150573_0

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

Ball impact resistant ventilation grilles, rectangular, made of aluminium, for supply and extract air. Rectangular profile border sections with rounded edges Preferably for wall and sill installation but also suitable for rectangular ducts.

Ready-to-install component which consists of a border and fixed horizontal blades.

Countersunk holes for fixing the grille to the installation surface.

Meets the requirements of DIN 18032, part 3.

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

Special characteristics

Fixed blades
Countersunk 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

Technical data

Nominal sizes: 325 × 125 to 1225 × 325 mm
Minimum volume flow rate (supply air): 17 – 275 l/s or 61 – 990 m³/h
Maximum volume flow rate (supply air), at L_WA max. 40 dB(A) without attachments: 95 – 950 l/s or 342 – 3420 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
AWT Single grille

Attachments
A       Without (grille face only)
AG       Damper unit, opposed action blades
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

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: AWT-AG/625×225/A1

Attachments	Damper unit, opposed action blades
Nominal size	625 × 225 mm
Installation subframe	With installation subframe
Exposed surface	Anodised, E6-C-0, natural colour

Dimensions and weight, Product details

AT, 30 mm wide front border 00204880_0

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

The weight table shows the available nominal sizes

AWT

H	L [mm]
H	325	425	525	625	825	1025	1225
H	m
mm	kg
125	1.3	1.6	2.0	2.3	3.0	3.6	4.3
225	1.9	2.4	2.9	3.4	4.4	5.4	6.4
325		3.2	3.8	4.5	5.8	7.1	8.5

Weights apply to ventilation grilles without attachments

Front border, 30 mm

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

Wall installation 00153790_0

Nominal length over 625 mm: with vertical centre mullion

Ventilation grille with screw fixing 00151457_0

① Ventilation grille
② Fixing screw (by others)

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 AWT

Product data sheet 1,8 MB pdf

certificates

Declaration of hygiene conformity Type AWT

AWT_HC_2024_05_DE_en Hygiene certificate 930 KB pdf
Non-CE Manufacturer's statement AWT

AWT_NotCE_2022_02_08_14_33_35_DE_en Certificate 930 KB pdf

operation manuals

Installation manual Lüftungsgitter

IM_2019_06_A00000054451_Lüftungsgitter_V3_GB_en Installation manual 680 KB pdf

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