DLQL-P
Square ceiling diffusers
Optional equipment and accessories
Application
Special characteristics
Nominal sizes
Ceiling tile
Air terminal device
Variants
Connection
Parts and characteristics
Attachments
Accessories
Useful additions
Construction features
Perforated plate has a free cross section of approx. 46 %
Hole diameter is 5 mm, the rows of holes are offset from each other
Materials and surfaces
Standards and guidelines
Maintenance
Functional description
Ceiling diffusers direct the air from air conditioning systems into the room. The resulting airflow induces high levels of room air, thereby rapidly reducing the airflow velocity and the temperature difference between supply air and room air. Ceiling diffusers allow for large volume flow rates. The result is a mixed flow ventilation in comfort zones, with good overall room ventilation, creating only very little turbulence in the occupied zone.
Type DLQL ceiling diffusers are fitted with a special baffle element that creates a horizontal air discharge and high induction levels. Horizontal air discharge is one-way to four-way. The supply air to room air temperature difference may range from –10 to +10 K.
To give rooms an aesthetic, uniform look, Type DLQL diffusers may also be used for extract air.
Nominal sizes – ceiling tile | 248, 298, 398, 498, 593, 598, 618, 623 mm |
Nominal sizes – diffuser | 250, 300, 400, 500, 600 mm |
Minimum volume flow rate | 6 – 145 l/s or 22 – 522 m³/h |
Maximum volume flow rate, with LWA ≅ 50 dB(A) | 275 – 285 l/s or 990 – 1026 m³/h |
Supply air to room air temperature difference | –10 to +10 K |
Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures.
The minimum volume flow rates apply to a supply air to room air temperature difference of –6 K.
The maximum volume flow rates apply to a sound power level of approx. 50 dB (A) (DLQL-*-Z-H: with damper blade position 0°).
Exact values for all parameters can be determined with our Easy Product Finder design programme.
Ceiling diffusers with perforated square diffuser face. Supply air and extract air variants for comfort zones. Diffuser face with baffle element for horizontal one-way to four-way supply air discharge. For flush installation into all kinds of suspended grid or continuous plasterboard ceilings.
Ready-to-install component which consists of the diffuser face with baffle element (only for supply air), and either a casing with top entry spigot or a plenum box with side entry spigot.
Perforated diffuser face suitable for central screw fixing (variant -P). The perforated plate has a free cross-section of approx. 46 % The hole diameter is 5 mm and the rows of holes are offset from each other.
Spigot suitable for ducts to EN 1506 or EN 13180.
Sound power level of the air-regenerated noise measured according to EN ISO 5135.
Special characteristics
Materials and surfaces
Technical data
Sizing data
Air-regenerated noise
Life cycle assessment
A life cycle assessment is available for the product series in form of an Environmental Product Declaration (EPD) that has been checked and published by a programme holder.
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Order example: DLQL-T-Z-H-M-L/600×593
Ceiling system | T-bar ceiling |
System | Supply air |
Connection | Horizontal |
Damper blade for volume flow rate balancing | With |
Accessories | With lip seal |
Nominal size | 600 |
Size of diffuser face plate | 593 |
Exposed surface | RAL 9010, pure white, gloss level 50 % |
DLQL-...-H
Designed for high comfort
Together with renowned designers and architects we have developed ceiling, wall, staircase and floor diffusers and grilles that are not only aesthetic design elements, but also meet demanding ventilation and acoustic requirements.
Variant
Nominal sizes
Ceiling tile
Air terminal device
Parts and characteristics
Construction features
DLQL-...-V
Variant
Nominal sizes
Ceiling tile
Air terminal device
Parts and characteristics
Construction features
DLQL-...-H
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DLQL-P mm |
DLQL-T mm | mm | mm | mm | mm | mm | mm | kg | ||
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DLQL-T: □Q1 = 618 is available for T-bar ceilings with grid size 625DLQL-P : □Q1 to 623 mm available
DLQL-...-V
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DLQL-P mm |
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DLQL-T: □Q1 = 618 is available for T-bar ceilings with grid size 625DLQL-P : □Q1 to 623 mm available
DLQL
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DLQL-P mm |
DLQL-T mm | m² | |
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Aeff applies to four-way air discharge
Installation and commissioning
These are only schematic diagrams to illustrate installation details.
Principal dimensions
ØD [mm]
Outer diameter of the spigot
ØD₁ [mm]
Outer diameter of a circular diffuser face
ØD₂ [mm]
Diameter of a circular diffuser face style
ØD₃ [mm]
Diameter of a circular plenum box
□Q₁ [mm]
Outer diameter of a square diffuser face
□Q₂ [mm]
Dimensions of a square diffuser face style
□Q₃ [mm]
Dimensions of a square plenum box
H₁ [mm]
Distance (height) from the lower edge of the suspended ceiling to the lower edge of the diffuser face
H₂ [mm]
Height of a ceiling diffuser, from the lower edge of the suspended ceiling to the upper edge of the spigot
H₃ [mm]
Height of a ceiling diffuser with plenum box, from the lower edge of the suspended ceiling to the upper edge of the plenum box or of the spigot
A [mm]
Position of the spigot, defined by the distance of the spigot centre line to the lower edge of the suspended ceiling
C [mm]
Length of the spigot
m [kg]
Weight
Nomenclature
LWA [dB(A)]
A-weighted sound power level of air-regenerated noise
V [m³/h] and [l/s]
Volume flow rate
Δtz [K]
Supply air to room air temperature difference, i.e. supply air temperature minus room temperature
Δpt [Pa]
Total differential pressure
Aeff [m²]
Effective air discharge area
All sound power levels are based on 1 pW.
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Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265
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For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265
Contact
We are here for you
Please specify your message and type of request
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265
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.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265
Type
Ceiling system
System
Connection
Damper blade for volume flow rate balancing
Accessories
Nominal size [mm]
Size of diffuser face plate [mm]
Exposed surface