Hybrid solution using gas & solar energy
Single-family house modernisation
Manfred and Luise are considering how to improve their carbon footprint and if they could heat their home solely using renewable energies. But to do so would involve optimising their thermal insulation (very expensive) and replacing all the radiators as their heating requirements are comparatively high.
The couple does not want to take on such an extensive renovation project at this point. Therefore, they are thinking of heating with gas but do not have a suitable connection.
Reasons for choosing a hybrid solution
Their heating contractor informs them that they can run their heating system from an LPG tank without needing to be connected to the gas mains and that renewable energies are not impossible. For a variety of reasons, they decide to replace their old oil boiler with a modern combination of a gas condensing boiler and solar thermal system.
Gas condensing boilers are currently the most energy-efficient way of heating with fossil fuels. Old oil heating boilers are inefficient and obsolete due to their high levels of pollutant emissions. This is also reflected by the current statutory requirement to replace this kind of heating system and the future ban on their installation.
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Why this combination is ideal
Manfred and Luise have shown that it is certainly possible to modernise their heating system and make it energy efficient even though the structural conditions are unfavourable. They managed this without complex measures, such as replacing the entire heating system and thermal insulation of the building.
Even just using a modern gas condensing boiler and combining this with solar heat significantly improves their energy consumption and reduces the cost of heating. Moreover, if they are connected to the gas mains in the future, they will not need to invest in another suitable boiler.