Krantz Components

Swirl · Displacementin section

DS

Step twist outlets with high induction (DS-DD, DS-RA, DS-BA)

blue = cool supply air orange = warm air

Move through the air · click for a gentle displacement flowTap for a gentle displacement flow

Twist, radial or floor outlet fitted in the step riser. The air mixes intensively with the room air at floor level; from about 0.5 m it rises gently past the audience.

DS Step twist outlets (DS-DD, DS-RA, DS-BA) by Krantz

Stylised view, not a measurement

Technical data ↓

How the DS works.

Twist, radial or floor outlet fitted in the step riser. The air mixes intensively with the room air at floor level; from about 0.5 m it rises gently past the audience.

Applications: lecture halls, conference halls, cinemas and theatres with raked floors; refurbishment (p. 2). Krantz reference in the Netherlands: Chassé Theater, Breda (old Peek site)

Krantz, Step twist outlets DS (DS-DD, DS-RA, DS-BA), DS 4065 E 02.2012.

Technical data DS

Max. ΔT cooling
supply – room down to −5 Kp. 4
Volume flow
DS-DD DN 63: 12 m³/hp. 2

Krantz, Step twist outlets DS (DS-DD, DS-RA, DS-BA), DS 4065 E 02.2012.

Page numbers are PDF pages of the data sheet.

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Air

Specifications of the DS with the source of each value · Air
PropertyValue · Source
Volume flow DS-DD DN 63: 12 m³/h, 3 per stoel; DS-DD DN 100, DS-RA DN 100, DS-BA DN 150: 35 m³/h, 1 per stoel p. 2
Max. ΔT cooling supply – room down to −5 K; supply – extract down to −12 K; min. supply temperature 18 °C p. 4
Example sound and pressure drop max. 12 / 16 / 18 / 14 dB(A) and 22 / 20 / 22 / 20 Pa for DD-63 / DD-100 / RA-100 / BA-150 p. 2
Comfort max. 0.15 m/s bij het publiek (turbulentie 40 – 45 %); boven 0.5 m ≤ 0.10 m/s; gradiënt ≤ 1.5 K/m; vloerzone ≥ 21 °C, hoofdzone 22.5 – 23 °C p. 4

Design

Specifications of the DS with the source of each value · Design
PropertyValue · Source
Sizes DN 63 / 100 / 150; bore Ø 80 – 165 mm; min. clear riser height 95 – 169 mm (DN 63 reduced to 83 mm); riser 18 – 85 mm or concrete ≥ 100 mm; min. spacing 150 mm (DN 63) / 500 mm p. 3
Materials and finish DS-DD plastic RAL 7038 agate grey; DS-RA galvanised sheet steel powder-coated RAL; DS-BA plastic RAL 7037 dusty grey; cap aluminium; fixed restrictor galvanised p. 6
Connections air from the floor plenum; perforated throttle disc on the inlet side; fixing with threaded bolt and rivet nut from the room p. 2
Options and versions DD = circular swirl diffuser, RA = radial swirl diffuser with circular face (square on request), BA = adjustable floor outlet set to displacement; mounting C (concrete) or W (timber) p. 6

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