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The technical lifetime of a measure

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After expiry of the technical lifetime, the considered building components or technical systems are necessarily replaced. Thus, the technical lifetime differs from the economic lifetime , which is also dependent on changes of usage requirements or technical progress and therefore might lead to premature replacement (before expiry of the technical lifetime).

The technical lifetime of the considered building components or technical systems is an essential factor for the evaluation of efficiency of modernisation measures. The technical lifetime is for instance reduced through high strain (usage, weather effects) and is generally dependent on the quality of the construction and design as well as on ongoing care and maintenance. The "common destiny" of different building components within an entire construction must also be considered. For a realistic assessment, the mentioned factors must be taken into consideration when determining the technical lifetime. Individual cases may vary considerably. Default values can be taken from the table table Technical lifetime (in german only) of building components and systems.

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