Which heating system is the best choice for an old building?
Old buildings have a unique charm, but their poor insulation and high ceilings place high demands on heating technology. So which heating systems provide the best solution? In this article, you'll learn which heating options are particularly suitable for older buildings and how modern technologies — like the heating solutions from 21energy — offer not only warmth but also financial benefits.
The Challenges of Heating an Old Building
Old buildings differ from modern ones in several key ways:
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Poor insulation: Many older buildings are inadequately insulated, leading to high heat loss.
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High ceilings: Above-average room height increases the heating demand.
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Outdated heating systems: Inefficient systems are often still in use and should be replaced with modern alternatives.
For sustainable and efficient heating, a tailored heating solution is necessary.
Which heating systems are suitable for old buildings?
Depending on the condition and use of the old building, the following heating systems are recommended:
- Hybrid heating: Combines a heat pump and gas heating for efficiency and flexibility. The heat pump works efficiently in mild temperatures, while the gas heating provides necessary warmth in colder weather.
- Pellet heating: A sustainable alternative to fossil fuels, ideal for poorly insulated buildings. Investment costs can be significantly reduced through subsidies from BAFA.
- Heat pump with underfloor heating: Provides even heat distribution and is an efficient solution even for old buildings.
- Modern gas heating: Condensing gas boilers optimize fuel use and are a proven option, especially if a gas connection already exists.
- Electric heating solutions with added value: 21energy’s electric heating systems not only provide efficient warmth but also a unique extra feature: you can generate Bitcoin while heating, reducing your heating costs in the long term.
Ofen 2 in a nutshell
Ofen 2
(1-year average)
As of 06.2025
(4-year average)
As of 06.2025
Tips for efficient heating in old buildings
To find the best heating for your old building, consider the following:
- Energy consultation: Get advice from a certified energy consultant. Platforms like Energie-Effizienz-Experten can help you find suitable experts.
- Use funding opportunities: Government programs from BAFA or KfW can significantly lower investment costs.
- Retrofit insulation: Improve your home’s insulation to save heating costs in the long run.
Advantages and Disadvantages of Heating Systems at a Glance
| Heating system | Advantages | Disadvantages |
|---|---|---|
| Hybrid heating |
|
|
| Pellet heating |
|
|
| Electric heating systems from 21energy |
|
|
Conclusion: The Right Heating System for Your Old Building
Old buildings require individually tailored heating solutions that are both efficient and sustainable. Hybrid systems, pellet heating, or gas heating offer proven approaches, while the innovative electric heating systems from 21energy provide an additional financial benefit. Take advantage of government subsidy programs and seek professional advice to find the best solution for your old building.
Picture from meineresterampe on Pixabay
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