The indoor climate in historical buildings plays a key role when it comes to the preservation of furnishings and collections. This is because unfavorable climatic conditions - e.g. excessive relative humidity or major climate fluctuations - can gradually destroy works of art. Besides the aspect of conservation, visitor comfort or energy efficiency, such as climate control strategies, may also need to be considered.
To develop climatic concepts for historical rooms, a thorough analysis of the building, collection, internal and external influences and of the interaction between the various parameters is essential.
Various aspects are measured and studied:
- temperature and relative humidity
- local temperature distribution (thermography)
- local microclimates
- air exchange rate
- air velocity
- CO2 concentration
- indoor air quality (assessed by special sensors)
- analysis of pollutant, e.g. in visitor rooms, archives, warehouses, showcases, etc.
- outdoor climate
These parameters, together with documentation on historical materials, techniques and preservation, serve as a basis for assessing individual risks and developing preventive conservation concepts.