CDK

Circular ceiling diffuser for supply air - Conical upper section

Cleanable
Adjustable slot
Aerodynamically shaped inlet cone
Non-perforated diffuser face = CDK
Perforated diffuser face = CKP
Standard colour White RAL 9003
- 5 alternative standard colours
- Other colours upon request

Calculate with your requirements

Design

The CDK and CKP consists of two parts: an aerodynamically shaped upper section with a connection spigot have including a rubber sealing ring, and a removable nonperforated diffuser face. Between the upper cone and the diffuser face there is a slot which can be adjusted in two positions. The diffuser face of the CDK is non-perforated and on CKP it is perforated in CKP is perforated. Both CDK and CKP are equipped with acoustic insulation.

Material and surface treatment

The upper part is manufactured in galvanized sheet steel. The diffuser face is made of sheet steel. The whole diffuser is painted inside and out.

Standard colour:
- RAL 9003, signal white, gloss 40
Alternative standard colours:
- RAL 9006, white aluminium, gloss 80
- RAL 9007, grey aluminium, gloss 80
- RAL 9010, pure white, gloss 40
- RAL 9005, jet black, gloss 35
- RAL 7037, dusty grey, gloss 30
Non-painted finish and other colours available on request.

AIR FLOW - SOUND PRESSURE ROOM (Lp10A) *)
CDK Size		25 dB(A)		30 dB(A)		35 dB(A)
CDK Size		l/s	m3/h	l/s	m3/h	l/s	m3/h
100		47	169	55	198	65	234
125		75	270	88	317	105	378
160		125	450	145	522	175	630
200		190	684	235	846	280	1008
250		240	864	275	990	325	1170
315		275	990	320	1152	370	1332

CDK Size	ALS Size	25 dB(A)		30 dB(A)		35 dB(A)
CDK Size	ALS Size	l/s	m3/h	l/s	m3/h	l/s	m3/h
100	80-100	18	65	33	119	38	134
125	100-125	30	108	50	180	60	216
160	125-160	50	180	80	288	95	342
200	160-200	77	277	115	558	145	522
250	200-250	120	432	160	576	215	774
315	250-315	175	630	225	810	300	1080
Data applies to 360° spread pattern. Data for CDK in combination with ALS commissioning box is stated for a total pressure drop of 50 Pa. *) Lp10A = Sound pressure incl. A-filter with 4 dB room attenuation and 10 m² room absorption area.

SAR

Frame for the aesthetic installation of a lowered diffuser plate

ALS

Commissioning box for air diffusers

Nordic Swan listed

The product is listed in the database for building products that can be used in Nordic Swan Ecolabelled buildings.

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Include Accessory documents

Document	Article	Document type	Date
Overview - Air diffusers (pdf 4.28MB)	Air diffusers	Brochure	21/02/2025
Commissioning guide - Air diffusers, VAV/CAV- & Commissioning dampers (pdf 7.73MB)	Air diffusers, VAV/CAV- & Commissioning dampers	IOM Manual	27/02/2025
Product description - Air diffusers & dampers (pdf 249.19kB)	Air diffusers & dampers	IOM Manual	19/10/2023
Circular ceiling diffuser for supply air - Conical upper section (pdf 1.28MB)	CDKb, CKPa	Technical catalogue	12/12/2022
Installation, commissioning, maintenance (pdf 760.94kB)	CDKb, CKPa	IOM Manual	12/12/2022
Building product declaration (pdf 105.7kB)	CDKa	Quality	24/05/2018
Nano certificate (pdf 71.51kB)	Air diffusers	Quality	03/10/2023

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