Ventilation concealed in the acoustic ceiling

Troldtekt® ventilation

Troldtekt ventilation provides fresh air without drafts, noise or visible installations. At the same time, the solution can reduce energy consumption by more than 70 per cent compared to traditional ventilation systems.

In a room with Troldtekt ventilation, fresh air is able to flow in at low pressure. In practice, the solution is an acoustic ceiling, which also functions as a ventilation surface. This means that you are spared the sight of visible ventilation ducts and fittings. Troldtekt ventilation has been specially developed for comfort ventilation in offices, schools and institutions.

Akustiklofter med Troldtekt ventilation giver frisk luft uden træk, støj og synlige installationer

Video: Function and benefits

In this video you can see how Troldtekt ventilation works in practice. See also how the solution provides both increased comfort and lower energy consumption. The benefits are thoroughly documented by researchers from Aalborg University and the Technical University of Denmark.

Stunning views and a healthy indoor climate

Hotel Koldingfjord is set on the banks of Kolding Fjord in East Jutland (Denmark), surrounded by woods. As part of a recent refurbishment project, Arkitema Architects and DEAS chose ventilation ceilings from Troldtekt for the exclusive conference rooms.

Download case study (pdf) here >>

Fresh air and a healthy indoor climate with Troldtekt ventilation ceilings in exclusive conference rooms

Fresh air with pleasant acoustics and aesthetics

There is clean air and superior acoustics at the kindergarten Børnebyen Christianshavn in Copenhagen, which welcomes more than 700 children daily. COBE and NORD Architects chose ventilation ceilings from Troldtekt to avoid any visually disruptive technical installations.

Download case study (pdf) here >>

Troldtekt, Børnebyen Christianshavn

Healthy learning environment

The University College South Denmark runs three study programmes at its campus in the Danish city of Aabenraa. The campus buildings have been designed by Henning Larsen Architects with a key focus on creating robust classrooms with lots of daylight, ventilation and good acoustics. This has been a decisive factor for the choice of natural materials, including concrete, linoleum and Troldtekt ventilation panels.

Download case study (pdf) here >>

Troldtekt, UC Syd Aabenraa

Energy efficient solution

Before renovating the Grønløkke School near the city of Aarhus in Denmark, the consultancy firm Ekolab analysed six ventilation solutions. Troldtekt ventilation stood out as being the most energy-efficient, and also scored highest in terms of the indoor climate. Now the solution has been installed in 32 classrooms.

Download case study (pdf) here >>

Troldtekt ventilation, Grønløkkeskolen

Vallensbæk School

Pupils perform significantly better when the air quality is good. These are the findings of a study conducted by DTU—Technical University of Denmark at Vallensbæk School in south-west Copenhagen, where two rooms were fitted with a ventilation ceiling from Troldtekt. The ceiling ensures optimum ventilation as well as fresh air injection, and markedly reduces energy consumption compared to conventional solutions.

Download case study (pdf) here >>

Troldtekt Vallensbaek School
Troldtekt ventilation

Product generator

The Troldtekt product generator provides a quick overview of all available Troldtekt products. By simply clicking your way through the options – colour, structure, installation details etc. - you specify your desired product. You are also provided with autocad drawings and an installation instruction for the specific product, ready to download.


Download brochure about Troldtekt ventilation

Technical data sheet

Troldtekt® ventilation panels

Troldtekt® ventilation panels

Installation instructions for Troldtekt® ventilation panels K0, K5 og K11 and K0-U installed with screws on suspended C60 profile system.
Installation instructions for Troldtekt® ventilation panels K5-F and K5-FU, installed with screws on suspended C60 profile system.
Installation instructions for Troldtekt® ventilation panels installed in exposed T24 profiles in removable, suspended ceiling system.
Installation instructions for Troldtekt® ventilation panels installed in exposed T35 profiles in removable, suspended ceiling system.

Installation instructions for Troldtekt® ventilation panels, installed in concealed T35 profiles in a removable ceiling system.

Troldtekt ventilation

Troldtekt ventilation is based on low-pressure air supplied through a ventilation ceiling. It is a comprehensive solution that ensures efficient indoor climate control while allowing more air changes and a higher cooling effect than traditional ventilation systems. Minimum pressure loss through the ceiling ensures even air distribution in the room.

A system with active and passive panels
The ventilation ceiling comprises a combination of active and passive Troldtekt acoustic panels. Fresh air is supplied into the room via the active panels. The passive panels have sealed mineral wool glued to the rear side, which prevents any air flow. The solution is completely free of visible ventilation ducts and fittings.

The size of the room determines the distribution of the two panel types, but usually 10-20 per cent of the ceiling is made up of active panels.

The injection surface is thus considerably larger than that in most traditional ventilation systems, where  air flows in through ventilation ducts. This means that you avoid discomfort from draughts, while the low pressure ensures significantly reduced energy consumption.

Dimensions and installation 

Troldtekt ventilation, dimensions 

The suspended ventilation ceiling is only approx. 200 mm thick, but makes it possible to hide all other installations and technical fittings (for example water, heating, electricity and sprinklers) in the cavity between the ceiling and the ventilation surface.

Thanks to the flexible suspension system, it is simple to remove the panels, providing easy access in order to replace or inspect the installations.

Download technical data sheet for Troldtekt ventilation.

Healthy and comfortable 
A good indoor climate is important for health. At the same time, the indoor climate needs to be comfortable, and this is where the thermal indoor climate plays an important role. The thermal indoor climate depends in particular on the operating temperature and air flow.

The operating temperature is determined by the air temperature and the temperature effects of the building surfaces (mean radiant temperature). The air flow depends on the air temperature and the stability of the air flow (turbulence intensity). Both factors are controllable with Troldtekt ventilation ceilings.

Troldtekt ventilation ceilings achieve better heat exchange between the supply air, the air in the rooms and the building mass than with traditional low-pressure systems. This means that you avoid down draughts and improve the mean radiant temperature.

Low-pressure ventilation
Troldtekt ventilation ceilings are based on low-pressure ventilation. In other words, the air flow from the ceiling towards the zone in use is gentle and does not disturb the air in the room, as it does with, for example, mixing ventilation.

Moreover, with Troldtekt ventilation ceilings, higher air volumes can be added and at temperatures substantially below room temperature – i.e. with greater cooling effect – than with traditional ventilation systems. These cooling effects can normally only be achieved through a combination of ventilation and cooling ceilings.