DLK-Fb

Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures.

The maximum volume flow rates apply to a sound power level of approx. 50 dB (A).

Exact values for all parameters can be determined with our Easy Product Finder design programme.

DLK-Fb, sound power level and total differential pressure

Square ceiling diffusers with integral fire barrier that ensures fire integrity in the event of a fire on the room side. Supply air and extract air variants for comfort zones. Diffuser face with fixed air control blades for horizontal supply air discharge. For flush installation into fire-resistant mineral fibre false ceilings made by Odenwald.

Ready-to-install component which consists of the diffuser face made of galvanised sheet steel, with fixed air control blades and a diffuser front frame with perimeter seal, a plenum box, side entry spigot, and support angles for installing the ceiling diffuser. The integral fire barrier consists of a mineral fibre board and a fusible link, release temperature 72 °C.

The diffuser face is fixed to the cross bar with a central screw.

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

• Horizontal four-way supply air discharge
• Diffuser face made of galvanised sheet steel
• With integral fire barrier for mineral fibre false ceilings
• Horizontal duct connection

Materials and surfaces

• Diffuser face and plenum box made of galvanised sheet steel
• Fire barrier made of special insulation material to EN 13501-1, fire rating class A2-s1 d0
• Diffuser face powder-coated RAL 9010, pure white
• P1: Powder-coated, RAL CLASSIC colour

Technical data

• Nominal sizes: 600, 625 mm
• Minimum volume flow rate: 220 – 380 l/s or 792 – 1368 m³/h
• Maximum volume flow rate, with L_WA ≅ 50 dB(A): 300 – 460 l/s or 1080 – 1656 m³/h
• Supply air to room air temperature difference: –10 to +10 K

Sizing data

• V _______________________ [m³/h]
• Δp_t _______________________ [Pa]

Air-regenerated noise

• L_WA _______________________ [dB(A)]

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

L_WA [dB(A)]

A-weighted sound power level of air-regenerated noise

V [m³/h] and [l/s]

Volume flow rate

Δt_z [K]

Supply air to room air temperature difference, i.e. supply air temperature minus room temperature

Δp_t [Pa]

Total differential pressure

A_eff [m²]

Effective air discharge area

All sound power levels are based on 1 pW.