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Download Energy Efficiency Refurbishments: Principles, Details, Case by Clemens Richarz, Christina Schulz PDF

By Clemens Richarz, Christina Schulz

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43 Development of German regulations to limit energy consumption in buildings with average inside temperatures. 37 Construction-related measures • • • • Heat sinks The chapter “Construction-related measures” addresses specific approaches to improving the energy balance of existing buildings by making changes to the construction. It is subdivided according to the accounting system of the Energy Saving Ordinance (Energieeinsparverordnung, EnEV) and the standard DIN V 18 599 into the topics “Heat sinks” (heat loss), “Heat sources” (heat gain) as well as “Ventilation” and “Daylight”.

This is incorrect and the effect is to imply that the energyefficiency measures are uneconomic. If a differentiated approach to assessing investment costs is taken, the maintenance and repair costs must be determined separately from the costs for the energy efficiency improvements. In the case of the refurbishment of a rendered facade, this would mean that the renewal of the render is classed as “maintenance”, whereas the installation of insulation should be included under “energy efficiency improvement”.

1 Minimum values for the heat transfer coefficients of room-enclosing building components according to DIN 4108-2:2003-07, table 3. If these values are observed, no further evidence is required and there is no danger of mould growth. 3 39 Construction-related measures Airtightness The airtightness of buildings is not only regulated in the EnEV, but also in the guidelines for minimum thermal protection. It can therefore be determined either according to DIN EN 12 114 or DIN EN 13 829. 1 m3/mh. The values in DIN 18 055 apply for windows.

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