Katherm QL

Trench convector with source air system for draft-free displacement ventilation

The Katherm QL supplies the room effectively with low-turbulence source air, for pleasant indoor air quality.

  • Heating
  • Ventilate
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Low-turbulence room ventilation

Katherm QL trench technology stands for low-turbulence room ventilation. It supplies the room effectively with treated fresh air. The fresh air is provided by a central ventilation unit (AHU) and introduced into the room as low-turbulence source air via the Katherm QL.

Effective cold air screening

In addition to the source air component, air warmed by the convector rises up the glass façade and efficiently shields it from a drop in temperature.

180 variants

The Katherm QL is available with a uniform trench width and in two trench heights.

Custom-made solutions

Custom-made solutions are possible for any building architecture with individual geometries. This applies to the trench and the grille.

Possible examples include:

  • Mitred corners
  • Curved versions
  • Angles and slopes
  • Column cut-outs
  • Various grille variants
  • Frame edges

Low investment and maintenance costs

Thanks to its structurally simple design, the Katherm QL requires little maintenance-related technology. This has a positive effect on the investment costs and enables straightforward Maintenance.

Short installation time

Thanks to the valve connection, quick and easy installation of the Katherm QL on site is possible. In addition, height adjustment screws and walk-on height adjustment feet are supplied as standard in order to further reduce installation time and therefore costs.

Protection during installation and construction period

Our Katherm trench technology products are carefully packed in cardboard packaging for transport. The grille edge trim profiles are protected against damage by green plastic profiles. A sustainable paper cover prevents dust and dirt from entering.

As the units are often installed in the building at an early construction stage, the grille can be replaced at the factory with a wooden installation cover for their protection for an additional charge. The grilles are then supplied separately packed.

Technical highlights

Very low discharge velocity

  • Source air enters the room at a low air velocity of less than 0.3 m/s.
  • It is distributed as low-impulse, draft-free air guidance for maximum comfort in the occupied zone.

Source air design

  • Source air design with integrated eccentrically mounted and adjustable air-guiding rollers, perforation row and deflection plates
  • For a uniformly directed and low-impulse source air discharge
  • Supply air connections for air introduction are mounted laterally along the trench length.

Hybrid concept

  • Central ventilation - decentralised temperature control: The combination of central ventilation via an AHU and decentralised air conditioning with pumped hot water enables efficient heating.

Control options

Electromechanical control

This variant is ideal for simple applications. All integrated actuators are factory-wired to a terminal and can be connected to our electromechanical accessories such as thermostats or external controllers.

Selection options

Adapt the product to your requirements – these options are available for you to choose from.

2‑pipe system

Heating or cooling (central changeover possible)

Design grilles

Wide range of versions in material and colour. Can be used on both sides. Shortening and extensions are also possible.

Product finder

With our free calculation program, you can find the product with the right performance data for your project in just a few steps. The official technical data sheet with your individual project values as a PDF for download is then available to you.

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Product documents

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