Krantz Components

The SwirlSwirl · mixing ventilationseen from below

DD-N

Twist outlet for ceiling installation

blue = cool supply air orange = warm air

Move through the air · click or hold for a swirl burstTap or hold for a swirl burst

As you see it in the ceiling. The air twists out of the vanes and fans out radially.

Vanes give the air its twist. The curved outlet turns the jet horizontal, along the ceiling. (DS 1175 E p. 3)

DD-N Twist outlet for ceiling installation by Krantz
DD-NTwist outlet · ceiling
Air distribution
diffuse, mixing ventilationp. 3
Max. ΔT cooling
−12 Kp. 4
Discharge height
2.2 – 4.5 mp. 4
Source · DS 1175 EKrantz Components, Twist outlet DD-N, DS 1175 E 12.2022

Stylised view, not a measurement

Technical data ↓

Air principle

From vane to occupied zone.

At the outlet

Fixed vanes give the supply air its twist. The curved outlet turns the jet horizontal. (DS 1175 E p. 3)

In the room

Horizontal, radial jets with high induction. They mix quickly with the room air, with no fixed jet in the occupied zone. (DS 1175 E p. 3)

Construction

A short spigot with a shaped circular face and built-in swirl vanes, fixed centrally with a plug and screw. Above it, a reducer (A, AF) or a low plenum box with side spigot (D, E). (DS 1175 E p. 2–3)

Technical data DD-N

Discharge height
2.2 – 4.5 mp. 4
Max. ΔT cooling
−12 Kp. 4
Volume flow
40 – 950 m³/hp. 10

Krantz Components, Twist outlet DD-N, DS 1175e 12.2022.

Page numbers are PDF pages of the data sheet.

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Air

Specifications of the DD-N with the source of each value · Air
PropertyValue · Source
Air distribution diffuse, mixing ventilation with high induction DS 1175 E p. 3
Volume flow 40 – 950 m³/h across DN 100 – DN 355 p. 10
Max. ΔT cooling −12 K p. 4
Max. ΔT heating +5 K; +10 K up to 3 m room height p. 4
Discharge height 2.2 – 4.5 m p. 4
Example DN 250, connection D, approx. 400 m³/h: 39 dB(A), 47 Pa p. 3
Penetration depth not given as a figure (diffuse system); minimum spacing from chart p. 8
Also for extract DA-L with cover plate, DN 100 – DN 355 p. 13

Design

Specifications of the DD-N with the source of each value · Design
PropertyValue · Source
Sizes DN 100 · 125 · 160 · 180 · 250 · 315 · 355 p. 6
Swirl element only also DN 63, from 8 m³/h p. 11
Swirl element polystyrene (RAL 7038 in the mass or wet-painted RAL 9010) or aluminium (natural or powder-coated RAL 9010, DN 250 · 315 · 355 only) p. 14
Reducer / box reducer aluminium; plenum box galvanised sheet steel p. 14
Connections A · AF · D · E, to spiral-seam or flexible duct p. 2
Options perforated cover plate; volume flow damper, adjustable from the room or at the spigot; acoustic lining of the box p. 13

Versions and sizes

Seven sizes, one form.

  • DN 100
  • DN 125
  • DN 160
  • DN 180
  • DN 250
  • DN 315
  • DN 355

To scale by nominal diameter · DS 1175 E p. 6. Dimensions per size: connection A/AF (p. 6) or D/E (p. 7).

FinishColour and material

Polystyrene agate grey RAL 7038 or white RAL 9010; aluminium natural or white RAL 9010 (DN 250 – 355). (p. 14)

ConnectionReducer or box

Reducer A or AF (with support flange), or low plenum box D or E with side spigot. (p. 2)

In the ceilingFlush or visible

In a closed false ceiling, exposed, or invisibly above an open grid ceiling (DS 1175 E p. 4). Connection type A mainly for closed ceilings and above grid ceilings, type E also for exposed mounting (p. 2–3); inserted from below and fixed with a single screw (p. 3).

Applications

Where it belongs.

Commercial and industrial rooms with high demands on air distribution, such as offices, schools and hospitals (DS 1175 E p. 2), at a discharge height of 2.2 to 4.5 m (p. 4).

When not: if the outlet sits higher than 4.5 m, look at the DD-VG (discharge height 3 – 28 m, DS 4033 E p. 2) or the RA-V2 (2.8 – 15 m, DS 4122 E p. 2).

Related in the collection

The same family, a different character.

TypeWhat it isEssenceSource
RA-NRadial outlet, round or squaretwelve star-shaped vanes, horizontal radial discharge via the Coanda effect; 2.2 – 4.5 mDS 4012 E p. 2–3, p. 12
RLRadial slot outlet RL-Q2 / RL-R2highly inductive radial jets, flush with the ceiling or free-hanging; 2.5 – 4.5 m depending on sizeDS 4186 E p. 2–3
DD-VGVariable twist outlet with jet straightenerfor high halls: horizontal when cooling, vertical when heating; 3 – 28 mDS 4033 E p. 2

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