Air principle
From outlet to occupied zone.
At the outlet
A finely perforated circular face plate in the step riser. (DS 4054 E p. 4)
In the room
The air spreads radially and low across the floor. Air velocities drop sharply as a result. (DS 4054 E p. 4)
Construction
A circular housing with fixed throttle and a discharge flange carrying the perforated face plate, sealing strip and claw or screw fixing. (DS 4054 E p. 3)
Technical data Q-SR
- Max. ΔT heating
- not stated
- Volume flow
- DN 80: max. 35 m³/hp. 4
Krantz Components, Step displacement outlets Q-S (Q-SR, Q-SL), DS 4054 E 07.2019.
Page numbers are PDF pages of the data sheet.
Download documents
Air
| Property | Value · Source |
|---|---|
| Air distribution | displacement, radial, low turbulence DS 4054 E p. 4 |
| Volume flow | DN 80: max. 35 m³/h, for 1 person · DN 100: max. 60 m³/h, up to 2 persons p. 4 |
| ΔT supply – room | down to −4 K p. 5 |
| ΔT supply – extract | down to −12 K p. 5 |
| Supply temperature | 19 °C p. 5 |
| Sound and pressure drop | DN 80, 25 – 36 m³/h: 19 – 36 Pa, 14 – 24 dB(A) · DN 100, 40 – 59 m³/h: 18 – 42 Pa, 14 – 27 dB(A) p. 5 |
| Max. ΔT heating | not stated |
Design
| Property | Value · Source |
|---|---|
| Sizes | DN 80 and DN 100; depth 80 mm p. 3 |
| Visible diameter | DN 80: 146 mm · DN 100: 212 mm (the dimension table gives ø DA1 195 mm for DN 100) p. 5, p. 3 |
| Min. spacing | 500 mm (DN 80) · 1 100 mm (DN 100) p. 3 |
| Material | galvanised sheet steel, visible part in RAL p. 8 |
| Fixing | 2 claws (K) or drywall screws (S, DN 100 only), for gypsum, calcium sulphate or fibre cement board p. 8 |
| Connection | air from a pressure plenum; fixed throttle in the circular housing p. 3 |
Versions and sizes
Two sizes, one per seat or per two.
- DN 80
- DN 100
DS 4054 E p. 3
Finish
visible part in RAL (p. 8)
In the auditorium
in a circular cut-out or bore in the step riser; timber or concrete steps (p. 2–3)
Applications
Where it belongs.
Lecture halls, conference halls and theatres, with timber or concrete steps (DS 4054 E p. 2).
Krantz references in the Netherlands: TivoliVredenburg, Utrecht (Q-SR); Schouwburg Kampanje, Den Helder (Q-SR); the Q-SR/Q-SL product page also lists De Doelen, Rotterdam and Tuschinski, Amsterdam
When not: For a continuous band behind the seats the Q-SL fits better (up to 75 m³/(h·m), DS 4054 E p. 5).
Related in the collection
Same family, a different character.
| Type | What it is | Essence | Source |
|---|---|---|---|
| Q-SL | Linear step displacement outlet | strip in the step riser; up to 75 m³/(h·m) at 0.18 m/s | DS 4054 E p. 5 |
| Q-ST | Seat displacement outlet | DN 100 · 127 · 190; ≤ 16 dB(A) | DS 4028 E p. 2, p. 4 |
| DS-RA-DN 80 | Circular step twist outlet | mixes quickly around the seated visitor; max. 25 m³/h | DS 4177 E p. 2 |
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