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Katherm HK
Heating Cooling Ventilation

Trench heating and cooling.

Katherm HK
Your benefits:
  • Heating and cooling in a 2-pipe and 4-pipe system

  • EC fan, quiet and energy-efficient

  • Condensate drip tray as standard

Key features

  • Short delivery times for our standard trenches
  • A matching edge profile for a perfect design with every grille
  • KaControl control system as standard; can be integrated into KaControl networks or building automation system, such as KNX, Modbus or LON
  • Cost-effective efficient heating and cooling even at low noise levels 


  • Energy-saving EC tangential fan with flow-optimised impellers, cascaded arrangement as a continuous fan belt; this produces uniform airflow through convector with minimal sound emissions.
  • High-performance coil optimised for airflow and heating and cooling output, with Eurokonus valve connection
  • 2-pipe or 4-pipe system for individual comfort in every room
  • Standard raised floor feet and mounting brackets with impact sound insulation for ease of installation of the trench system and avoidance of sound transfer
  • Anti-torsion mechanism for heating connections prevents damage to the convector when fitting the valves; valves optionally available as accessories
  • Specially designed condensate tray for safe removal of the condensate and simultaneous air routing; can be pulled out to the room side for ease of cleaning in line with the Hygiene Directive VDI 6022.
  • Condensate pump set (optional) to drain condensate, if needed


  • Buildings of all kinds in which there is a high cooling requirement due to the sun’s rays
  • Clear view and feel good temperature in front of full-length glass façades
  • Developed to meet the requirements of a modern room air conditioning
  • 9 unit lengths, 2 unit widths, 2 unit heights; made-to-measure lengths on request

... also good to know

  • The heat outputs were measured and determined in accordance with DIN EN 16430 "Fan-assisted radiators, convectors and trench convectors" Part 1: "Technical Specifications and Requirements", Part 2: "Test method and Evaluation of Heat Output" and Part 3 "Test Method and Evaluation of Cooling Output".
  • The acoustics measurements were carried out in a semi low-reflective acoustic chamber in compliance with DIN EN ISO 3744.



Katherm HK Trench Heating 3D


More information on cooling

Technical catalogues
Katherm HK trench heatingdownload as.pdf, 11,98 MB
Spezial Katherm HK trench heating, screen-optimizeddownload as.pdf, 2,24 MB
Cross-product information
Product overview, products available in UKdownload as.pdf, 4,79 MB
Overview product innovations 2017download as.pdf, 2,41 MB
Spezial Hoteldownload as.pdf, 2,41 MB
Spezial Commercial buildingsdownload as.pdf, 2,17 MB
Spezial KaControl building automationdownload as.pdf, 794,90 KB
Information sheet trench heating - BS EN 16430, applicable in UKdownload as.pdf, 215,12 KB
Installation manuals
Katherm HK trench heatingdownload as.pdf, 11,75 MB
KaControl for Katherm HKdownload as.pdf, 2,53 MB
Building product declaration Katherm trench heatingdownload as.pdf, 333,01 KB
TÜV Certificate ISO 9001:2008download as.pdf, 140,21 KB
UL Certificate of Compliancedownload as.pdf, 372,53 KB
EU Declaration of Conformity Katherm trench heatingdownload as.pdf, 840,35 KB
BIM data (Building Information Modeling)
BIM-Datadownload asDownload
CAD drawings
Katherm HK 320, 2-pipe system, top viewsdownload as.dwg, 1,00 MB.dxf, 3,92 MB.pdf, 95,54 KB
Katherm HK 320, 2-pipe system, viewsdownload as.dwg, 693,74 KB.dxf, 2,52 MB.pdf, 142,51 KB
Katherm HK 320, 4-pipe system, top viewsdownload as.dwg, 1,15 MB.dxf, 4,46 MB.pdf, 100,69 KB
Katherm HK 320, 4-pipe system, viewsdownload as.dwg, 731,19 KB.dxf, 2,65 MB.pdf, 145,52 KB
Katherm HK 340, trench height 190 mm, cross sections, viewsdownload as.dwg, 314,31 KB.dxf, 1,97 MB.pdf, 118,52 KB
Katherm HK 340, trench height 190 mm, top viewsdownload as.dwg, 680,81 KB.dxf, 4,81 MB.pdf, 144,04 KB
Technical details

This table only gives you a brief overview of the technical data. If you are looking for a more detailed product description and further technical data, please use the technical catalogue. The product configurator and the calculation program will help you to find the right article for your selection.

KaControl recirculating air control accessories


wall-mounted room control unit, with integral room temperature sensor, only for use with C1 controller
Installation instructions: i385_kurz_kacontroller_int.pdf

Download specifications (.rtf)
Article no.:

Room temperature sensor

wall-mounted, surface-mounted, IP30, colour white RAL 9010

Is the KaController installation site suitable for a temperature measurement? - If it is not suitable, e.g. behind a curtain, then a KaControl room temperature sensor should be chosen for each group!
Download specifications (.rtf)
Article no.:

Outside sensor

wall-mounted, 50 x 65 x 45,5 mm, white similar to RAL 9010, IP54
Download specifications (.rtf)
Article no.:

Clip-on pipe sensor

for recording the medium temperature, incl. clip-on strap, 3 m cable length, for changeover heating/cooling

Is there a risk of frost, e.g. due to the ingress of cold air – if so, then a KaControl clip-on pipe sensor should be chosen for each unit!
Download specifications (.rtf)
Article no.:

Serial CANbus card

For increasing the number of units in a single-circuit system to a maximum of 30 units, one required per unit
For increasing the cable length from the first to the last unit from 30 to 500 m
Download specifications (.rtf)
Article no.:

Serial Modbus card

One needed per unit for connecting to KaControl panels or on-site Modbus networks
Download specifications (.rtf)
Article no.:

Control accessories electromechanical EC

Room thermostat

230 V, heating/cooling with 2-pipe/4-pipe system, surface-mounted, 3-stage, with OFF/Manual/Automatic fan changeover, max. two units can be connected (Katherm HK max. 5 units).
Download specifications (.rtf)
Article no.:

Control accessories electromechanical 24 V

Clock thermostat

24 V, heating/cooling with 2-pipe system, flush-mounted, continuously variable, with LCD operating menu and integrated timer program, heating/cooling changeover by means of external potential-free contact (low voltage), max. five units can be connected
Download specifications (.rtf)
Article no.:

Valves and Return shut-off valves

Valve body

suitable for:
Katherm NK 137/182 (trench heights 92 mm and 120 mm)
Katherm HK 320, Katherm HK 290
Download specifications (.rtf)
Article no.:

Pre-setting key

Pre-setting key for valve bodies type 346909, 346910, 346911 and convector valve set type 126103, pre-settable, one required per project
Download specifications (.rtf)
Article no.:

Return shut-off valve

suitable for:
Katherm NK,
Katherm QK,
Katherm HK 320, Katherm HK 340, Katherm HK 290
Download specifications (.rtf)
Article no.:

Pre-setting set

for valve body with higher flow rate, type 346914
Article no.:

Valve Actuators

Thermoelectric actuator

24 V AC/DC for KaControl and clock thermostat type 30456!
Download specifications (.rtf)
Article no.:

Valve kits

Valve kit

Heating/cooling with 1 no. axial valve body, pre-settable, 1/2” connection, 1 no. angled return shut-off valve, 1 no. thermoelectric actuator 24 V, supplied loose
Download specifications (.rtf)
Article no.:


Filter for air inlet

Article no.:

Condensate pump assembly kit

Connection kit for condensation pump

Article no.:

Installation covers

Wooden installation cover

to protect trench during installation, factory-fitted, grilles are packed separately
Download specifications (.rtf)
Article no.:

1. Where are Katherm HK units typically used?

Katherm HK for heating and cooling are ideal for all areas of buildings that need to be heated in winter and cooled in summer due to the high incidence of sunlight through the glass façades. Many years of experience have show that Katherm HK can be used to provide cost-effective and efficient cooling in these areas.

2. What systems are possible with Katherm HK?

Katherm is available as a 2-pipe system and also as a 4-pipe system when heating with LPHW and chilled water (CHW).

3. Which fans are used in the Katherm HK?

Extremely energy-efficient EC tangential fans are used, which maximise use of the energy consumed. They are far superior to conventional shaded-pole motors particularly at low fan speeds. Operating the units at very low fan speeds equates to very low noise levels.