Company profile

DencoHappel offers central-plant and decentral solutions for air handling and air conditioning. You can filter, heat, cool, humidify and dehumidify air economically and in an environmentally-friendly way. Our products are suitable for various industries: they help hotels provide a comfortable atmosphere for their guests, create pleasant and productive working conditions in offices, ensure well-being in churches and museums and simultaneously protect the buildings’ structures and exhibits.

Close-control air-handling units ensure a constant indoor climate in sensitive laboratories or data centers, hygienic units in turn are geared to the needs of the health sector or the industry. Air-filter systems and last but not least cleanroom systems safeguard clean production conditions und minimize health hazards.

Economical motors, systems for heat recovery and utilization of environmental thermal energy enhance among others the energy efficiency of solutions with our products. Moreover, in-house control systems offer further savings potential.

Research and Development

For DencoHappel tomorrow begins today
Market leadership and strength are constant obligations that DencoHappel assumes in a future-oriented working environment. This includes the efficient use of non-renewable energy resources, as well as careful treatment of the environment. We work as partners for planners, plant engineers as well as systems contractors and offer optimized, customized climate-control solutions for each project. At DencoHappel we lay great importance on flexibility and market proximity. With use decentral decision-making process by establishing target-oriented contacts with our teams on site.

High-Tech in top form 
With top performance, you should expect top appearance. When equipment demonstrates functional and formal unity and is moreover aesthetically tailored to the interior conditions of your site – then system design becomes a positive element in interior furnishing. Our specialists have received numerous national and international design awards for such work.

DencoHappel Technology Center
We heavily invest in own research and development projects, with emphasis on sophisticated control technology. Systems with increased intelligence characterize these activities. Numerous new developments at DencoHappel have continuously provided critical momentum to our industry.

Energy needs
We have specialized in developing products with a maximum of energy efficiency. This topic is increasingly gaining importance. Especially when we consider the mandatory European Building Energy Certificate that provides valuable conclusions on the energy quality of a building structure. We apply dynamic energy simulations to determine the energy influences that act on enclosed building space. In addition, we can also effectively simulate building automation, utility systems and plant operation in order to study energy conservation on a time-discrete basis. The following are taken into account:

  • heat-storage effect of the building core
  • site-dependent climate data
  • analysis of extreme values
  • relationships within the thermal building behaviour and user behaviour

We perform testing to determine whether the relationship between performance capability and noise emission is optimal. In our acoustic testing facilities, we perform standard acoustic-power measurements in accordance with comparative testing techniques. We employ advanced measurement systems in the form of real-time analytic devices that enable short measuring times. Tested systems can be studied in accordance with their requirements, for example

  • Measurements on the air-intake side
  • Measurements on the air-discharge side
  • Overall acoustic-power measurements

Thermal Comfort

We spend most of our lifetime in closed rooms. That’s why a healthy room environment is so critical for our comfort. Various factors contribute to this: different standards and directives provide essential information on generally valid criteria for thermal comfort. Our laboratory for measuring air and heat flow in rooms perform simulations of a great variety of room situations. Measuring systems can acquire data on all room variables that play an important role in determining thermal comfort. This enables to optimize room design with respect to comfort. Sensors are fixed on site and can accurately determine the prevailing environmental conditions in a room. Our computer-aided flow-analysis systems provide key support in the determination and verification of comfort characteristics. These facilities not only allow to complete room-climate tests and comfort simulations, but also enable the optimization of air-flow characteristics.

Structural analysis
For the engineering design as well, we offer essential support for heating, ventilation, and air conditioning. We apply advanced CAD technology here, closely linked to component and assembly optimization by FEM. In this way, we also effectively carry out temperature-related field studies for cases involving the consequences of thermal loads and deformations in solids.


DencoHappel employees are encouraged and qualified to follow responsible business practice right from the start to work out sustainable air and climate-control solutions.

DencoHappel has constantly proven its innovative capability and assertiveness. Investors, planners, and users profit from the co-operation resulting in sustainable and entrepreneurially attractive solutions. This enables employees to bear the responsibility for their work and to measure themselves against the satisfaction of their customers. They commit themselves personally to the optimum achievable in air treatment in buildings, and are systematically trained to always aspire to this goal. The main focus is not the individual “job position,” but the development of the employee’s personality along with all professional and individual capabilities.

A pronounced learning and innovation culture, short decision-making paths, and decentralized organization all open up opportunities and a scope of action for the employees of DencoHappel to take over entrepreneurial responsibility even in their young years. Apart from professional considerations, the courage to make decisions, the capability for teamwork and common responsibility for results – and, not least, the will to make ideas out of visions and develop new products and applications from ideas: all of these are promoted in the course of their development. Specialists, project managers, and executives cooperate directly and openly, at eye level – and with success.

DencoHappel offers first-rate conditions:

  • A learning and innovating culture is intensively advanced by the management
  • Human resources development early and purposefully strengthens independent action as well as the acceptance of entrepreneurial responsibility
  • Advancement of teamwork with joint responsibility for results in an open working environment fosters confidence
  • Decentralized company structures with short, transparent decision-making processes and flat hierarchies
  • Abundance of resources, security, and competence


DencoHappel product brands are established in different air-treatment segments and comprise application ranges in cooling, heating, humidification, dehumidification and air filtration.

Our product brands are not only well known but recognized by the industry as well.

  • Happel stands for first-class and energy-efficient air handling units.
  • Denco specializes on close-control units for precision application.
  • Delbag belongs to the prominent brands in air filtration.
Contact Us

DencoHappel UK Ltd.

Moreton Business Park Moreton-on-Lugg Hereford HR4 8DS
United Kingdom
+44 1432 27 7277
+44 1432 26 8005
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