Hydraulic Balancing 2026: Mandatory, Costs & KfW Funding
Hydraulic balancing has been mandatory in many cases since 2022 – and even for existing systems with renewable energies since 2024. Many homeowners are familiar with the phenomenon behind it from their own everyday lives: the radiator in the living room is glowing, while the bathroom upstairs barely gets warm. This imbalance is precisely what balancing rectifies – and in doing so, it incidentally reduces heating costs.
This guide shows you when balancing is required, what it costs, and what funding you can get for it in 2026. The key facts upfront: typical costs €300–€1,500, around 15% heating cost savings, a 20% bonus on BEG funding – and mandatory for many heating renovations.
What is hydraulic balancing?
Hydraulic balancing involves adjusting the heating system so that each radiator receives exactly the amount of water needed to heat its room. The physical background: heating water always takes the path of least resistance. Without balancing, it preferentially flows through the radiators closest to the pump – while more distant rooms are inadequately supplied.
Residents usually react to this problem by treating the symptoms: the flow temperature is turned up or the pump is set to a higher level so that even the last radiator gets warm. Both waste unnecessary energy, as the already oversupplied rooms then receive even more heat than necessary. During balancing, the specialist company instead adjusts a pre-set thermostatic valve on each radiator so that the flow precisely matches the required heating output of the room.
The result is a heating system that operates with lower flow temperatures and reduced pump performance – especially important for condensing boilers and heat pumps, which operate most efficiently under these conditions. The effects at a glance:
Advantages with balancing
- 10–15% immediate heating cost savings
- Even room temperature
- No more noise (knocking, whistling)
- The heating runs longer
- Mandatory for many subsidies
Disadvantages without balancing
- Rooms on upper floors remain too cold
- Rooms near the heating unit become too warm
- Higher heating costs
- Frequent cycling of the heating system
- No BEG funding
When is hydraulic balancing mandatory?
In recent years, the legislator has gradually made hydraulic balancing mandatory – first for large residential buildings with central gas heating, then for an increasing number of cases involving heating system replacement and funding. The reason is simple: balancing is one of the most cost-effective efficiency measures available and unlocks savings potential without interfering with the building structure.
For owners, this means: anyone installing a new heating system, planning a heat pump, or wishing to claim government funding cannot avoid balancing. Landlords of larger properties are also obliged to comply and should keep an eye on deadlines.
According to EnSimiMaV (Energy Saving Ordinance) and GEG:
- Multi-family houses with 10 or more residential units: Mandatory by September 30, 2024
- Multi-family houses with 6 or more residential units: Mandatory by September 30, 2024
- For heating system replacement: Mandatory from 2024
- For heat pump installation: Mandatory for BEG funding
- For every newly installed heating system since 2022
Attention: Without hydraulic balancing, there is no BEG funding. It may also be mandatory for the energy performance certificate when selling the property – more information can be found in the guide Energy Performance Certificate & Ventilation.
Comparison of Procedure A and Procedure B
In practice, two approaches have become established, differing primarily in their accuracy. In the simplified procedure, the specialist estimates the required water quantities based on experience and rules of thumb – this is quick and already provides a noticeable improvement over a completely unbalanced system.
The detailed procedure is significantly more precise: here, the actual heating load, i.e., the amount of heat the room genuinely needs in cold weather, is calculated for each individual room. Factors such as room size, external wall areas, windows, and insulation status are included in the calculation. Based on this, the valves are individually pre-set – the result is a precisely balanced system.
| Procedure | Description | When? |
|---|---|---|
| Procedure A | Simplified: pre-setting of valves according to rule of thumb | Multi-family house with 6+ units |
| Procedure B | Detailed: room-by-room heat load calculation plus individual pre-setting | Single-family house, BEG funding |
Procedure B is more accurate and mandatory for BEG funding. It is also the procedure that heating engineers must use when installing a heat pump. You can read whether a heat pump is suitable for your building in the article Heat pump in old buildings.
Who is allowed to perform hydraulic balancing?
- SHK master craftsmen or equally qualified specialists
- Energy consultants (for the calculation)
- Heating installation companies with proof of expertise
- For Procedure B: Mandatory entry in the VdZ database
Costs at a glance
The costs for hydraulic balancing essentially depend on three factors: the size of the building, the chosen procedure, and the condition of the existing system. A single-family house with pre-set thermostatic valves can be balanced much faster than a multi-family house where all valves first need to be replaced.
Even if Procedure B with an energy consultant initially seems more expensive, the more precise calculation generally pays off through higher savings and eligibility for funding. And if you are having the balancing done anyway as part of a heating renovation, you save yourself a separate appointment with a craftsman. The typical price ranges:
| Variant | Typical Costs |
|---|---|
| Single-family home without energy consultant (Procedure A) | €300–€500 |
| Single-family home with energy consultant (Procedure B) | €500–€1,000 |
| Multi-family home 6 units (Procedure A) | €800–€1,500 |
| Multi-family home 12 units (Procedure B) | €1,500–€2,500 |
| Complete heating renovation with balancing | €3,000–€8,000 |
If the pipe network is also renewed during the renovation, you will find suitable heating pipes and press fittings in our range.
Funding 2026 and Procedure
The state rewards hydraulic balancing twofold: first, as an independently funded efficiency measure, and second, as a prerequisite for larger funding projects such as heat pump installation. Those who plan the sequence wisely can benefit from both effects – which is why it is worthwhile not to view balancing in isolation but to embed it in an overall concept.
Important for the process: funding applications must generally be submitted before commissioning the specialist company, and the professional execution must be documented. The entry in the VdZ database serves as recognized proof for the funding provider.
Hydraulic balancing is funded through the BEG individual measures (BAFA):
- 20% funding on the measure costs
- +5% iSFP bonus additionally (renovation roadmap)
- Mandatory prerequisite for many other funding programs (heat pump, solar thermal)
Pro-Tip: Have the balancing done together with the heating replacement – then the entire bonus applies to the complete measure. You can effectively receive up to 70% funding. Details can be found in the guide on Heat Pump Funding 2026.
Step-by-step to funding
- Commission an energy consultant (dena list)
- Have a heat load calculation prepared according to DIN EN 12831
- Have hydraulic balancing according to Procedure B calculated
- Heating engineer adjusts valves and pump
- Protocol entered into the VdZ database
- Send proof of use to BAFA – then payment follows
Frequent Questions
Is hydraulic balancing mandatory for my house?
Yes, for heating system replacement, heat pump installation, or in multi-family houses with 6 or more residential units. Privately, without these factors, it is not strictly mandatory but recommended – the savings generally pay for the measure themselves.
How long does hydraulic balancing take?
In a single-family home, 2–3 hours for Procedure A. For Procedure B with calculation, 1–2 days total.
Will I really save 10–15% on heating costs?
Yes, if the heating was previously unevenly distributed. For a modern, well-adjusted system, the savings are smaller (5–10%).
Do I need balancing again after replacing the heating system?
Yes, every new heating system requires fresh balancing. It is not transferable because the hydraulic conditions in the system change with the new heat generator.
Can I do the balancing myself?
Theoretically yes, but for BEG funding, it must be carried out by a certified specialist – including the VdZ entry.
Conclusion
Hydraulic balancing is almost always worthwhile: 10–15% heating cost savings, quieter operation, and the prerequisite for BEG funding clearly speak for the measure. For heating system replacement and heat pump installation, it is mandatory anyway – those who skillfully combine it with renovation secure maximum funding and avoid double appointments with craftsmen. Even in existing buildings without an acute reason, balancing is one of the most cost-effective efficiency measures available, as it noticeably improves living comfort and pays for itself through saved heating costs. Only the correct order is important: first the funding application, then the commissioning.
Everything for optimizing your system can be found in the heating assortment of wohnungstechnik.de.
