Type AH

Ventilation grilles, made of aluminium, with fixed horizontal blades – also for horizontal runs

Single ventilation grilles and horizontal run sections with special profiled blades

Nominal sizes 225 × 75 – 1225 × 425 mm and horizontal run sections
Volume flow rate range 10 – 1235 l/s or 36 – 4446 m³/h
Grille face made of aluminium with anodised finish
Front border, 20 mm or 28 mm wide
Straight (0°) or angled (15°) air discharge
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 or countersunk holes (only for 28 mm wide front border)

AH-0-A/825×225 00137411_0

AH-0-A/825×225

Application

Ventilation grille of Type AH as supply air or extract air variant for comfort zones and industrial zones
Directed supply air discharge for mixed flow ventilation
Blades for straight (0°) or angled (15°) air discharge 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

Fixed blades
Front border in two widths
Concealed screw fixing, spring clip fixing or countersunk holes
Also for continuous horizontal runs
Optional installation subframe and casing for the fitting of filter media

Nominal sizes

Single grille

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

Horizontal run section

Nominal length of end section: 960, 1130, 1310, 1490, 1670, 1850 mm
Nominal length of middle section: 2000 mm
Nominal height: 75, 125, 225, 325 mm

Other dimensions upon request

Variants

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

Front border

28 mm wide
20 mm wide

Fixing

Concealed screw fixing
E11: Concealed screw fixing (20 mm)
A11: Countersunk holes (only 28 mm)
B11: Spring clip fixing (28 mm)
F11: Spring clip fixing (20 mm)

Parts and characteristics

Rectangular profile border sections
Fixed horizontal blades
Vertical lateral mullions
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 (only with 28 mm wide front border)

Construction features

20 mm or 28 mm wide border
Blades for straight (0°) or angled (15°) air discharge

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	225 × 75 to 1225 × 425 mm
Horizontal run section	H: 75, 125, 225, 325 mm
Minimum volume flow rate	10 – 410 l/s or 36 – 1476 m³/h
Maximum volume flow rate, with L_WA max. 40 dB(A) without attachments	55 – 1235 l/s or 198 – 4446 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
75	0.004	0.007	0.009	0.012	0.014	0.019	0.024	0.029
125	0.009	0.014	0.020	0.025	0.030	0.041	0.051	0.062
225		0.029	0.040	0.051	0.062	0.084	0.106	0.127
325			0.061	0.077	0.094	0.127	0.160	0.193
425						0.170	0.214	0.258

Effective air discharge area (supply air)

H	L [mm]
H	225	325	425	525	625	825	1025	1225
H	A_eff
mm	m²
75	0.006	0.009	0.011	0.014	0.017	0.022	0.028	0.034
125	0.011	0.017	0.022	0.028	0.034	0.044	0.055	0.066
225		0.034	0.044	0.055	0.066	0.087	0.108	0.129
325			0.066	0.081	0.096	0.129	0.169	0.193
425					0.129	0.169	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	0.004	0.006	0.009	0.011	0.013	0.017	0.021	0.026
125	0.009	0.013	0.017	0.021	0.026	0.033	0.041	0.049
225		0.026	0.033	0.041	0.049	0.066	0.082	0.090
325			0.049	0.060	0.072	0.095	0.120	0.140
425					0.095	0.122	0.155	0.185

AH, volume flow rate ranges 00246683_0

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

Ventilation grilles, rectangular, made of aluminium, for supply and extract air. Rectangular profile border. 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.

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

Fixed blades
Front border in two widths
Concealed screw fixing, spring clip fixing or countersunk holes
Also for continuous horizontal runs
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 × 425 mm
Horizontal run section, height: 75 – 325 mm
Minimum volume flow rate (supply air): 10 – 410 l/s or 36 – 1476 m³/h
Maximum volume flow rate (supply air), at L_WA max. 40 dB(A) without attachments: 55 – 1235 l/s or 198 – 4446 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
AH Single grille

Blade construction style
0 0° blades (straight)
15 15° blades (angled)

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       For front border width F = 28 mm
B1       For front border width F = 20 mm

Fixing
       No entry: concealed screw fixing, F = 28 mm
E11       Concealed screw fixing, F = 20 mm
A11       Countersunk holes, F = 28 mm
B11       Spring clip fixing, F = 28 mm
F11       Spring clip fixing F = 20 mm

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: AH-15-AG/825×225/B1/E11

Attachments	Damper unit, opposed action blades
Blade construction style	15°
Nominal size	825 × 225 mm
Installation subframe	With installation subframe for 20 mm wide front border
Fixing	Concealed screw fixing
Exposed surface	Anodised, E6-C-0, natural colour

Order example: E-AH-0/1310×225

Section	End section
Attachments	None
Blade construction style	0°
Nominal size	1310 × 225 mm
Installation subframe	Without
Fixing	Concealed screw fixing, 28 mm wide front border
Exposed surface	Anodised, E6-C-0, natural colour

Order example: AH-EF-0-AS/1025×125/P1-RAL 9010

Blade construction style	0°
Attachments	Hit and miss damper
Nominal size	1025 × 125 mm
Exposed surface	Powder-coated RAL 9010, pure white

Dimensions and weight, Product details

AH, 28 mm wide front border

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

Illustration shows AH-0

The weight table shows the available nominal sizes

AH, single grille

H	L [mm]
H	225	325	425	525	625	825	1025	1225
H	m
mm	kg
75	0.3	0.4	0.5	0.7	0.8	1.0	1.2	1.5
125	0.5	0.7	0.9	1.1	1.3	1.7	2.1	2.5
225		1.3	1.6	2.0	2.4	3.1	3.8	4.6
325			2.4	2.9	3.4	4.5	5.5	6.7
425					4.5	5.9	7.3	8.7

Weights apply to ventilation grilles without attachments

AH, horizontal run section

H	Section
H	E	M
mm	kg/m	kg
125	4.1	8.2
225	6.1	12.2
325	8.2	16.4

Middle section M: 2000 mm

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

Weights apply to sections without attachments

Front border, 28 mm

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

Wall installation 00153775_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
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

Print page Type AH
Product data sheet Type AH

Product data sheet 2,2 MB pdf

certificates

Declaration of hygiene conformity Type AH

Declaration of hygiene conformity 140 KB pdf

operation manuals

Installation manual Air grilles

IM_2019_06_A00000054451_Lüftungsgitter_V3_GB_en Installation manual 680 KB pdf

Type AH

Ventilation grilles, made of aluminium, with fixed horizontal blades – also for horizontal runs

Technical information

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

Dimensions and weight, Product details

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

Downloads

product information

Print page Type AH

Product data sheet Type AH

certificates

Declaration of hygiene conformity Type AH

operation manuals

Installation manual Air grilles

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