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SPIN

Germany

Thermal insulation with renewable materials

Roswag & Jankowski Architekten, Berlin, have energetically restored a detached house built in 1965 by eliminating thermal bridges and reinforcing heat insulation with the renewable materials wood and cellulose which have been added to the front. Windows were exchanged by triple vitrified wood windows. Gas heating and radiators were replaced by a ground source heat pump equipped with a geothermal probe and underfloor heating. Fresh air supply is achieved with a central ventilation system with heat recovery that preheats supply air in addition to the ground heat exchanger. In total, implemented measures resulted in a considerable decrease of energy demand from 234.3 kWh/m2a down to 37.5 kWh/m2a. This equals a reduction in energy consumption by 84 %.

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