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Decentralised indoor climate systems

Simple and reliable

Decentralised indoor climate systems with heat pumps

Simple and reliable solutions for the right climate

Our decentralised indoor climate systems provide tailored solutions for heating, cooling and ventilation in factory and production halls, aircraft hangars, logistics centres and shopping centres. As a system provider, we supply everything from a single source. For a simple, reliable solution.


A decentralised indoor climate system is a group of individual units that are connected together via a system controller. The units are positioned in selected locations and have their own heat pumps, enabling them to work independently of each other. They supply the output that is required in the location in question in order to ensure the correct temperature in each place.

This means that different climate zones can be created in the same hall if required.

Decentralised indoor climate systems are the reliable, cost-effective solution for simple climate control in single-storey halls.

Simple to plan, implement and operate

Reliable: constant, uniform temperatures in your hall

A worthwhile investment for the future

Simple to plan, implement and operate

Our aim is to provide our customers with practical system solutions that are as simple as possible. A decentralised indoor climate system offers simple coordination, planning, implementation and operation.

Simple coordination

A decentralised indoor climate system is a complete solution for heating,
cooling and ventilation. Each individual unit takes care of the functions that central systems are only able to achieve by means of numerous different functional units. With a decentralised system with heat pump, all requirements – heating, cooling, ventilation, distribution, control, service – are covered in one go.

Elsewhere on the market, customers are required to procure components
from various suppliers and combine them at great cost and inconvenience – but at Hoval, they can simply opt for a fully self-contained unit. Each unit merely requires a power cable and a control cable. 

The main argument for customers is definitely the simplicity of the system – and the fact that they have just one contact.”
Christoph Steinhäusler, Hoval engineer

Simple planning and implementation

It is not just the system itself that is simple – planning it is easy too.

At Hoval, customers have just one contact person for their project(s), minimising the amount of coordination work required. This saves a significant amount of time for everyone involved: from the planning stage right through to installation and commissioning.

Decentralised indoor climate systems are flexible and can be easily expanded to take account of future requirements, making the planning process even easier. In addition to advising customers, Hoval also serves as the point of contact for planners, installers and electricians – the only additional tradespeople required for a decentralised indoor climate solution.

Once the planning stage is complete, it just takes a few simple steps to implement the system. The fact that the ventilation system and heat pump are combined means that each individual unit can take care of heating, cooling and ventilation. The installation process therefore simply involves positioning the compact units on the roof and connecting the power and control system.

Simple operation

Once the preassembled, plug-in units are in position and connected, the integrated system controller with intuitive user interface takes care of all further functions. After it has been configured, the controller ensures that the individual units work together correctly and that the ideal climate is maintained in the hall.

The required temperature conditions can be easily adjusted on the go and on an individual basis.

Reliable operation

Because the system is made up of self-contained individual units which can generate heat and cold by themselves, a stable and reliable indoor climate is guaranteed even if one unit is taken out of operation for maintenance: the other units simply take over to provide the necessary function.

With decentralised indoor climate systems, operational reliability is always guaranteed.

Constant indoor climate

Looking to ensure a constant temperature in a hall? As a decentralised indoor climate system requires very few components for its construction and functioning, negative influencing factors are all but non-existent. The simple, streamlined system enables precise temperature control and can be adapted fully to suit the requirements in a hall.

With its modular construction, the decentralised indoor climate system is equally well suited to the requirements of logistics halls for food or production halls for metal processing – up to a ceiling height of 25 m. The various unit types can be combined in any way and can be relied on to create a constant indoor climate.

Uniform temperatures without draughts or stratification

The Air-Injector ensures uniform air distribution without temperature stratification. It blows air in vertically or horizontally depending on whether heating or cooling is required. The uniform distribution prevents draughts and ensures a feeling of comfort.

Heating operation: The supply air is warmer and thus lighter than the room air. The vertical inflow of air ensures that the heat reaches the areas where it is needed.

Cooling operation: The inflowing air is colder than the room air and sinks. To avoid draughts, it is injected horizontally.

Thus the Air-Injector ensures uniform temperatures without stratification.

In our warehouse, a constant temperature of 18°C. must be maintained all year round, as wines and spirits react very sensitively.
Clemens Sadnik, project manager at Del Fabro Kolarik, beverage wholesaler

Heat pumps – a future technology

Sustainability and cost-effectiveness are not mutually exclusive. On the contrary: Hoval system solutions are sustainable and represent an investment in the future: Unlike conventional heating systems which burn fossil fuels such as gas and oil, heat pumps use ambient air – which is freely available. Heat pumps are future-proof solutions that use natural resources and can be operated with virtually no emissions.

With a decentralised indoor climate system, you are harnessing the technology of the future.

Low operating costs

Decentralised indoor climate systems use highly efficient heat pumps which enable heating and cooling to be carried out by the same unit. These heat pumps achieve high coefficients of performance with roughly 75% energy gain from the ambient air. The rest of the energy can be obtained in a self-sufficient manner in combination with photovoltaic systems or green electricity – without using fossil fuels and without causing CO2 emissions. For sustainability that is also cost-effective.

Furthermore, heat pumps have a long service life and require little maintenance compared to conventional heating systems. Not only does this save on operating costs, it also reduces consumption of resources

Solar power makes it possible to operate the hall cooling system extremely economically and in an environmentally friendly manner.
Clemens Sadnik, project manager at Del Fabro Kolarik, beverage wholesaler

Maximum efficiency

In the case of conventional systems, some of the energy losses are due to the routing of lines over long distances – whereas the self-contained individual units of the decentralised indoor climate system are characterised by short air lines (between heat/cold generation and the air outlet).


Decentralised indoor climate systems represent maximum energy efficiency: perfectly coordinated components (ventilation unit, air distribution, energy generation), optimum control for all individual units and the maximum possible usage of the heat or cold that is generated. All in one with maximum efficiency.

Minimal energy losses

Minimal energy consumption due to optimum air distribution: the Air-Injector prevents the occurrence of air layers over the height of the hall, thus reducing the difference between the room temperature below the roof and the outdoor temperature – minimising transmission losses as a result.

The powerful air distribution means that only a low air flow rate is required. This saves not only on drive energy, but also on investment and operating costs too.