High-temperature heat pumps are presented as a practical solution for heating unrenovated old buildings, particularly those lacking insulation. These pumps generate flow temperatures up to 80°C, making them compatible with conventional radiators found in historic properties, thus avoiding the need for system replacements. This capability addresses heat loss challenges common in poorly insulated structures while preserving existing infrastructure. The technology functions similarly to standard heat pumps but employs a modified refrigeration cycle. Ambient heat is extracted from air, compressed to elevate its temperature, and transferred to the heating system. This allows sustained warmth in older buildings without requiring major upgrades. Compatibility with existing systems reduces installation complexity, though some adjustments may be needed depending on radiator types or piping configurations. Cost considerations include higher initial expenses compared to traditional systems like oil or gas boilers. However, long-term economic benefits may emerge through energy efficiency, influenced by electricity prices and renewable energy use. Incentives, such as subsidies or tax reductions, are available in many regions, potentially lowering upfront costs and enhancing affordability. Professional consultation is advised to optimize system sizing and integration for individual properties. Environmental benefits depend on the electricity source. When powered by renewables, these pumps can significantly reduce CO₂ emissions compared to fossil fuel systems, aligning with sustainability goals. Their ability to balance energy efficiency with minimal structural changes positions them as a strategic option for aging building stock. In summary, high-temperature heat pumps offer a bridge between preserving historical infrastructure and adopting modern, sustainable heating solutions. By leveraging existing systems and minimizing renovation efforts, they provide energy-efficient, adaptable heating for older buildings where insulation upgrades are impractical. (298 words)