A consistently warm house, efficient use of energy and an optimally adjusted heating system — that depends on hydraulic balancing. There are two approaches to choose from, which promise different paths. But which method is the most suitable? In this article, we'll compare the two and show you what the difference is.

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What is hydraulic balancing?

A hydraulic balancing is a method for adjusting heating systems. It is adjusted so that each radiator receives the exact amount of water it needs. This ensures an even distribution of heat throughout the building. The aim of hydraulic balancing is to reduce energy consumption, increase living comfort and optimize the operation of the heating system.

There are two approaches to this: the automatic hydraulic balancing and the calculated hydraulic balance. Both methods have specific advantages and disadvantages.

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Automatic and calculated hydraulic balancing: A direct comparison

Automatic and calculated hydraulic balancing pursue the same goal, namely to increase the efficiency of the heating system. But they differ in their approach, accuracy, and applicability. The following table provides an overview of the key differences:

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How does automatic hydraulic balancing work?

Automatic hydraulic balancing is achieved by using presettable thermostatic valves or intelligent radiator thermostats. These devices automatically regulate the water flow so that each radiator receives the required amount of heat. This is done without the need for complex calculations, as the systems make adjustments independently.

The following devices and systems are used for automatic hydraulic balancing:

• Smart thermostatic valves: They continuously measure the room temperature and adjust the flow rate accordingly.
• automatic flow regulators: Ensure that the flow remains constant at a pre-set level.

A major advantage of automatic hydraulic balancing is that easy and quick installation. Since no extensive calculations are required, this method is particularly suitable for smaller heating systems or for subsequent optimization. Automated control reduces heating costs.

However, automatic hydraulic balancing also has disadvantages. He is less precise as the calculated adjustment and reaches its limits in complex heating systems. For larger buildings or systems with special requirements, this method is therefore not the optimal choice.

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How does the calculated hydraulic balance work?

The calculated hydraulic balance is based on a detailed analysis and precise adjustment of the heating system. First, all relevant data such as building details, radiator outputs and pipeline dimensions are recorded. Based on this information, the Heat load calculated. The flow rates for each radiator are then individually adjusted and optimal heat distribution is ensured.

Carrying out the calculated hydraulic adjustment requires specialist knowledge and is usually carried out by a specialist company. The adjustment is made either manually on the thermostatic valves or through the replacement of components, so that the flow can be precisely regulated.

The calculated hydraulic balance has a high precisionn. The heating system is optimally tailored to the requirements of the building, which not only increases energy efficiency but also saves heating costs in the long term. This method is particularly suitable for complex systems or larger buildings where precise coordination is crucial.

However, the calculated hydraulic balance with a higher expenditure of time and costs connected. Collecting the data and making adjustments require more effort than with the automatic process, which is also reflected in the costs. Nevertheless, this method offers the greatest possible efficiency and sustainability.

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What are the costs of both methods?

At 300 to 700€, automatic reconciliation is cheaper than calculated reconciliation at 700 to 2,000€. The exact costs depend on the chosen method, the size of the heating system and the individual features of the building.

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Is funding possible?

Die BAFA funding is possible, but exclusively for calculated hydraulic Comparison according to method B. This requires precise heat load calculation and exact adjustment of flow rates. Automatic hydraulic balancing does not meet the requirements for method B and is therefore ineligible. Funding amounts to up to 15% of eligible costs and must be applied for before the start of the measure.

When does which method make sense?

The choice between automatic and calculated hydraulic balancing depends on several factors:

• Automatic hydraulic balancing: This method is useful for smaller buildings such as single-family homes with manageable heating systems. It is particularly suitable when the budget is limited and simple, quick optimization is sufficient. Even with standard radiators, this method may be sufficient.
• Calculated hydraulic balance: This method is ideal for larger buildings, such as apartment buildings or commercial buildings, as well as for complex heating systems such as floor heating systems. It offers maximum efficiency and long-term savings, but requires more time and money. Even if funding is being sought, the calculated reconciliation is the only option as it meets the requirements for method B.

Future prospects: Automatic processes on the rise?

Intelligent heating systems are developing rapidly, and automatic processes are gaining in precision and applications. Smart thermostats, AI and IoT-based technologies enable dynamic adjustment of heating output and could soon also be suitable for more complex systems.

With lower costs and simple installation, automatic processes in smaller buildings could partially replace the calculated reconciliation. However, calculated reconciliation remains essential for complex systems and funding applications.

Can the hydraulic adjustment also be carried out by yourself?

Simplified hydraulic balancing, for example by installing smart thermostatic valves, can be carried out by yourself, but is only suitable for small, simple systems. A calculated reconciliation requires expertise and should be carried out by a specialist company, in particular for precise results and funding requirements.

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