WK-D-KS

CHILLED CEILING ELEMENTS FOR A PLEASANT INDOOR CLIMATE AND A HIGH LEVEL OF COMFORT

Chilled ceiling sails as an energetic design element for dissipating internal thermal
loads

Available in various dimensions
Combined functions through room cooling, heating, ventilation, acoustic
optimisation
Saves operating costs by dissipating thermal loads via the medium water
Reduces supply air volume flows to the hygienically required minimum
Combination with all standard ventilation systems
Thermal increased performance on the chilled ceiling sail through integrated
air diffuser
Ideally suited for replanning and refurbishment of existing buildings
Can be combined with component activation
Can be combined with geothermal energy as a cost-effective and sustainable
energy source
Simple handling: connection usually to a cooling water network with a water
inlet temperature ≥ 16 °C provided by the client

Optional equipment and accessories

Accessibility by pulling down
Customised cut-outs in the chilled ceiling sail possible
Flexible connecting hoses (Type FS)

General information

Application

Suitable for visible installation below bare ceilings as a chilled ceiling sail
Suitable for visible installation above open suspended ceilings
Room heights 2.60 m - preferably 4.0 m
Saves operating costs by dissipating thermal loads via the medium water.
Reduces supply air volume flows to the hygienically required minimum
Dissipation of specific thermal loads through radiation exchange and convection (cooling case), increased comfort
Particularly comfortable room temperature, especially when cooling, thanks to uniform temperature distribution
Energy savings in cooling and heat generation due to low water temperatures
Savings in transport energy or air transport by reducing the air volume flow to the minimum fresh air rate

Special characteristics

Summary of individual room requirements in a chilled ceiling sail
Cooling and heating: through copper tube meandering
Acoustics: sound absorption through integrated acoustic fleece
Maximum effectiveness through the use of patented alpha-WLT technology
Acoustic mats for higher sound absorption (optional)
Ventilation: through integrated ceiling diffusers, concealed or visible variants possible
Cut-outs for integration of fixtures such as lighting possible on a project-specific basis
Chilled ceiling sail variant with large metal ceiling tiles as an aesthetic element
Flat perforated metal ceiling tile with non-perforated edge
Factory-set unit for less installation work on site
Hinged version for variants without integrated air diffuser
Performance adjustment possible due to different meander divisions

Nominal sizes

L: 2000 mm – 3500 mm
Crossbars for fixing depending on the length
≤ 2499 mm: 2 crossbars
≥ 2500 mm: 3 crossbars
B: 800, 900, 1000, 1100, 1200 mm
H: 50 mm, without air diffuser

Construction

Chilled ceiling element

Without chilled ceiling element
M: with chilled ceiling element

Connection

No entry: water connection 180

90: Water connection 90°

Preparation for ceiling diffuser

without
V: for concealed installation (TID)
D: for visible installation (AIRNAMIC)
PL: for exposed installation of slot diffuser

Parts and characteristics

Ceiling panel made of galvanised sheet steel, powder coated
Perforation for acoustic effectiveness
Design element with numerous integration options
Hinged version possible
Crossbars made of galvanised sheet steel
For suspension provided by the client
Copper tube meander (Cu)
D-tube design for increased performance
Pipe connections calibrated with support sleeves, ideal for flexible connection hoses
Heat conducting rail alpha-WLT made of aluminium (AlMg3)
Higher performance compared to conventional heat conducting profiles
Higher acoustic effectiveness of the activated chilled ceiling sail
Acoustic fleece, black
In accordance with DIN EN 13501-1, fire class A2-s1, d0

Material and surfaces

Ceiling panel made of galvanised sheet steel
Standard perforation Rg 2,5 – 5,5/16,2 %
Perforation-free edge circumferential approx. 12 mm
Powder-coated surface, RAL 9016 matt, standard
Crossbar made of galvanised sheet steel
Heat conducting rails made of aluminium (AlMg3)
Copper tube meander (Cu)

Construction features

Possibility of combining the chilled ceiling sail with TROX air diffusers
Hinged version possible for variants without integrated air diffuser
The copper pipe meanders are optimally connected on the ceiling panel using special heat conducting rails (patented alpha-WLT technology)
Copper meander as D-tube, to increase performance
For an ideal connection on site: connections of the copper tube meander possible in various arrangements

Standards and guidelines

DIN EN 13964: Suspended ceilings - Requirements and test methods
Cooling capacity according to DIN 14240
Heating capacity data according to DIN EN 14037, Part 5
DIN EN 12449: Copper and copper alloys - Seamless round pipes for general purposes

Maintenance

Low-maintenance as construction and materials are not subject to wear

Useful additions

Project-specific ceiling air outlets for integration into the ceiling cooling element
V: Type TID
Outlet concealed, invisible
D: Type AIRNAMIC
Diffuser front painted in RAL 9010
PL: Type PURELINE
Diffuser in the colour of the ceiling cooling element
Air control blades similar to RAL 9005, jet black
Flexible connecting hoses (Type FS)
Various control systems possible: in combination with valves, valve actuators, dew point sensors, window contacts, etc.

Technical information

Schematic illustration of WK-D-KS with copper tube meander

1 Threaded rods (to be provided by the client)

2 Crossbar

3 Ceiling tile with acoustic fleece

4 Heat conducting rail

5 Copper tube meanders

Schematic illustration of WK-D-KS with concealed air diffuser

Schematic illustration of WK-D-KS with visible air diffuser

Schematic diagram of WK-D-KS with slot diffuser

General information:

Chilled ceilings and chilled ceiling sails absorb heat from the room air and transfer it to the transport medium water. Chilled ceilings are usually full-surface suspended ceilings that work according to the radiation principle. Chilled ceiling sails, for example, consist of chilled ceiling elements in an open construction with gaps.

Radiant chilled ceilings:

Radiant chilled ceilings are passive cooling systems. Heat is transferred by radiation and convection. The respective

proportions are determined by the structure of the chilled ceiling system. Radiant cooling ceilings usually have closed ceiling surfaces. The proportion of radiation here is up to 60 %. The remainder is generated by free convection.

The Type WK-D-KS is suitable for visible installation below bare ceilings as a chilled ceiling sail and for visible installation above open suspended ceilings. Chilled ceiling sails are technically large heat exchangers that are installed under the bare ceiling.

The cooled water flows through the copper tube meanders at a flow temperature of approx. 16 °C. The entire ceiling element is cooled by connecting the copper tube meanders with heat conducting rails on the chilled ceiling sail. All heat sources in the room transfer their excess heat energy to the cooled ceiling surface through radiation exchange and convection. The thermal energy is absorbed by the chilled ceiling sail and dissipated from

the room via the water.

Length	2000 – 3500 mm
Height	without air diffuser: 50 mm with air diffuser: 180, 185, 200 mm
Width	800, 900, 1000, 1100, 1200 mm
Standard cooling capacity EN 14240 (Δt 8 K)	104 – 120 W/m²
Standard cooling capacity EN 14240 (Δt 10 K)	134 – 153 W/m²
Heating capacity based on DIN EN 14037-5 (Δt 15 K)	163 – 182 W/m²
Heating capacity based on DIN EN DIN EN 14037-5 (Δt 30 K)	345 – 385 W/m²
maximum operating pressure, water side	6 bar
maximum operating temperature, water side	50 °C
Sound absorption coefficient according to DIN EN ISO 354	0.70 – 0.75

Standard cooling/heating capacities, depending on the ceiling tile dimensions and meander pitch.

Cooling/heating capacity as a function of Δt (tR - tvm) and the meander division.

Cooling/heating capacities apply to chilled ceiling sails made of steel. Higher values can be achieved with aluminium chilled ceilings sails.

For the heating function, surface temperatures > 35 °C should not be selected for reasons of comfort.

Maximum operating pressure and maximum operating temperature apply in combination with flexible connection hoses.

A maximum of 50 % of the specified heat output can be used in the occupied zone because only the radiation component is effective.

The measurement of a chilled ceiling system is carried out according to the standard cooling capacities (φw, c, a) according to DIN EN 14240.

For comparability, however, the specific performance data on the sail area (φw, c, i) should be provided.

This is the only way to easily determine the achievable cooling capacity based on the possible ceiling occupancy level and to

compare it to the cooling capacity per m2 of floor space that is required for the design.

Frequency	125 Hz	250 Hz	500 Hz	1000 Hz	2000 Hz	4000 Hz
αs; T = 135 mm	0.21	0.52	0.7	0.73	0.74	0.69
αs; T = 95 mm	0.18	0.54	0.68	0.75	0.75	0.71

Chilled ceiling sails with copper tube meander in 135 or 95 mm pitch.

Sound absorption coefficient according to DIN EN ISO 354

αw; T = 135 mm = 0,70

αw; T = 95 mm = 0,75

WK-D-KS

–

2000 ×

1000

–

200

–

RAL 9010

1 Type
WK-D-KS Chilled ceiling sail

2 Chilled ceiling element
No entry: steel ceiling tile, perforated, with acoustic fleece on the back, hinged
X Perforated steel ceiling tile with cut-outs and with acoustic fleece on the back

3 Chilled ceiling element
No entry: without chilled ceiling element
M with chilled ceiling element

4 Connection
No entry: water connection 180°
90 Water connection 90°

5 Ceiling tile length [mm]
2000 – 3500
The chilled ceiling sail is available in increments of 250 mm

6 Ceiling tile width [mm]
800, 900, 1000, 1100, 1200

7 Preparation for ceiling diffuser
No entry: without preparation
V for concealed installation
D for visible installation
PL for installation of slot diffuser

8 Version ceiling diffuser
160 Air diffuser in nominal size 160 mm (V, D)
200 Air diffuser in nominal size 200 mm (V)
250 Air diffuser in nominal size 250 mm (D)
181 PURELINE 18-1
182 PURELINE 18-2
351 PURELINE 35-1
352 PURELINE 35-2

9 Surface
No entry: powder-coated RAL 9016 (traffic white), matt
P1 powder-coated, specify RAL CLASSIC colour

Downloads

product information

Product data sheet WK-D-KS

WK-D-KS_PD_2026_02_05_DE_en Product data sheet 1,6 MB pdf

operation manuals

Installation manual WK-D-KS

WK-D-KS_IM_CD10089_V2_2025_12_GB_en Installation manual 530 KB pdf

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WK-D-KS

CHILLED CEILING ELEMENTS FOR A PLEASANT INDOOR CLIMATE AND A HIGH LEVEL OF COMFORT

General information

Technical information

Downloads

product information

Product data sheet WK-D-KS

operation manuals

Installation manual WK-D-KS

TECHNICALLY NECESSARY

STATISTICS AND WEBSITE ANALYSIS

CONVENIENCE AND PERSONALISATION

FOR THE BEST TROX EXPERIENCE