Many homeowners wonder whether a heat pump also makes sense in an old building. While heat pumps can often be used without any problems in new buildings, there are some challenges in older buildings. Nevertheless, switching to a heat pump can be an efficient and sustainable solution even in an old building.
What requirements must an old building meet?
Not every old building is automatically suitable for a heat pump. There are some important factors that need to be taken into account:
- Building insulation: Good insulation reduces heat loss and improves the efficiency of the heat pump.
- Radiators or surface heating: Low-temperature heating systems such as underfloor or wall heating are ideal. Conventional radiators can be inefficient.
- Space for the heat pump: Depending on the type, space is required in the house or garden, especially for geothermal heat pumps.
- Hydraulic balancing: A well-coordinated heating system improves efficiency and reduces energy consumption.
Which heat pump is suitable for old buildings?
- Air-water heat pump: Easiest to retrofit, but requires a well-insulated property for efficient operation.
- Brine-water heat pump (geothermal heat pump): Very efficient, but higher installation costs due to drilling or collectors.
- Hybrid solution: A heat pump in combination with an existing heating system can make sense if the insulation is not optimal.
costs and savings potential
Depending on the system, installing a heat pump can cost between 15,000 and 40,000 euros . Thanks to government subsidies of up to 70%, the investment costs are reduced considerably. In addition, heating costs are reduced in the long term because renewable energy is used and fossil fuels are no longer needed.
Funding opportunities for heat pumps in old buildings
The federal government supports the switch to renewable energies with generous funding programs. These include:
- BAFA subsidies: Up to 70% funding for replacing an old heating system with a heat pump.
- KfW loans: Affordable financing with repayment grants for energy-efficient renovations.
- Regional funding: Some federal states or municipalities offer additional subsidies.
Conclusion
A heat pump can also be worthwhile in an old building if the conditions are right. Good insulation, suitable heating surfaces and careful planning are crucial for efficiency. With the current funding programs, switching is more attractive than ever and can lead to significant savings in the long term. If you are unsure, you should seek advice from a specialist company to find the best solution for your own building.
