KDY

Duct diffuser with nozzles to be mounted in ventilation ducts

Easy to install
Available for both circular and rectangular ducts
Guide vane control
Flexible spread pattern
Available in galvanized version
Standard colour White RAL 9003
- 5 alternative standard colours
- Other colours upon request

Calculate with your requirements

Rectangular nozzle diffuser for supply air. Mounted directly in circular or rectangular ducts. Suitable for constant or variable flow conditions. Air may be supplied at under- or over-temperature, with horizontal or vertical spread patterns. It is always possible to change the spread pattern after installation without affecting air flow, pressure drop or sound level.

Technical description

Design

The KDY is a rectangular supply air terminal designed to be mounted directly in the side of either a rectangular or circular duct. The front of the diffuser is fitted with a number of aerodynamically formed nozzles. There is a fixed vane on the inside of the diffuser front which gives an even outward airflow through the whole unit. The diffuser is available with two, three or four rows of nozzles.

Material and surface treatment

The diffuser is manufactured in galvanized sheet steel and is painted.

Standard colour:
- White semi-gloss, lustre 40, RAL 9003/NCS S 0500-N
Alternative standard colours:
- Silver gloss, lustre 80, RAL 9006
- Grey aluminium gloss, lustre 80, RAL 9007
- White semi-gloss, lustre 40, RAL 9010
- Black semi-gloss, lustre 35, RAL 9005
- Grey semi-gloss, lustre 30, RAL 7037
Non-painted finish and other colours available on request.

Adaptation

AIR FLOW - SOUND PRESSURE ROOM (Lp10A) *)
KDY Size	25 dB(A)		30 dB(A)		35 dB(A)
KDY Size	l/s	m3/h	l/s	m3/h	l/s	m3/h
2-7	18	65	23	83	27	97
2-9	24	86	29	104	35	126
2-14	37	133	45	162	54	194
2-18	47	169	58	209	70	252
3-14	55	198	68	245	81	292
3-18	70	252	88	317	105	378
4-14	70	252	88	317	105	378
4-18	95	342	115	414	140	504
Applies to diffuser, installed in the duct. *) Lp10A = Sound pressure incl. A-filter with 4 dB room attenuation and 10 m² room absorption area.

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Include Accessory documents

Document	Article	Document type	Date
Duct diffuser with nozzles (pdf 623.12kB)	KDYa	Technical catalogue	20/06/2023
Building product declaration (pdf 74.35kB)	KDYa	Quality	24/05/2018
Installation, commissioning, maintenance (pdf 329.63kB)	KDYa	IOM Manual	24/05/2018
Nano certificate (pdf 71.51kB)	Air diffusers	Quality	03/10/2023
Product description - Air diffusers & dampers (pdf 249.19kB)	Air diffusers & dampers	IOM Manual	19/10/2023
Commissioning guide - Air diffusers, VAV/CAV- & Commissioning dampers (pdf 7.75MB)	Air diffusers, VAV/CAV- & Commissioning dampers	IOM Manual	19/08/2024
Overview - Air diffusers (pdf 3.34MB)	Air diffusers	Brochure	12/07/2022

Whilst we have made every effort to ensure information on this website is up to date and accurate, the technical specification and availability of products/services listed on this website may vary market to market and are subject to change without notice. Please contact your regional representative or visit your local website for further details.