Application
Special characteristics
Nominal sizes
Other dimensions upon request
Variants
Front border
Fixing
Parts and characteristics
Attachments
Accessories
Technical data
Construction features
Materials and surfaces
Standards and guidelines
Maintenance
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 |
Minimum volume flow rate | 23 – 685 l/s or 83 – 2466 m³ /h |
Maximum volume flow rate, with LWA 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 |
Ventilation grilles, rectangular, made of aluminium, 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, 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
Materials and surfaces
Technical data
Sizing data
Sizing data
Air-regenerated noise
AT | – | AG | / | 825 × 225 | / | A1 | / | B11 | / | P1 – RAL … |
| | | | | | | | | | | | |||||
1 | 2 | 3 | 4 | 5 | 6 | |||||
2 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
3 Nominal size [mm]
L × H
4 Installation subframe
No entry: none
A1 For front border width F = 27 mm
B1 For front border width F = 23 mm
5 FixingNo entry: concealed screw fixing, F = 27 mm
G11 Concealed screw fixing, F = 23 mm
A11 Countersunk holes, F = 27 mm
B11 Spring clip fixing, F = 27 mm
H11 Spring clip fixing, F = 23 mm
6 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 %
Attachments | Damper unit, opposed action blades |
Nominal size | 825 × 225 mm |
Installation subframe | With installation subframe for 27 mm wide front border |
Installation | Concealed screw fixing |
Exposed surface | Anodised, E6-C-0, natural colour |
AT | – | EF | – | AS | / | 825 × 225 | / | P1 – RAL … |
| | | | | | | | | | ||||
1 | 2 | 3 | 4 | 5 | ||||
AT Single grille, 27 mm wide front border
2 Construction
EF Installation subframe with filter element (ISO Coarse 60 %, Medium C11 (DIN EN ISO 16890)) and spring clip fixing
3 AttachmentsA Without
AS Hit and miss damper
4 Nominal size [mm]
L × H
5 Exposed surfaceNo entry: anodised, E6-C-0, natural colour
P1 Powder-coated, specify
RAL CLASSIC colour Gloss level
RAL 9010 50 %E-EF | / | 825 × 225 |
| | | | |
1 | 2 | |
Installation and commissioning
These are only schematic diagrams to illustrate installation details.
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Contact
We are here for you
Please specify your message and type of request.
Tel.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051
Contact
Thank you for your message!
Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051