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Improvement of thermal comfort and reduction of energy use and costs of residential dwelling


Storczykowa Str, Rajszew, Masovia Voivodship, Poland

Scope of Renovation

To improve thermal comfort and reduce energy use and costs.


  • Building consists of 5 flats, 2 floors and a cellar
  • Owned and managed by Commune Jablonna
  • Residents are of low-income with some being retired, unemployed or unable to work due to health conditions
  • Each dwelling is equipped with a coal-fired stove with no wall insulation (brick walls)
  • Construction year: 1949
A large, old three story house built near trees

Partner responsible

Transformation measures

  • Installation of 25 kWp PV panels to cover the electricity demand of common areas and partially drive the heat pump
  • More efficient DHW storage
  • Hybrid ventilation
  • Thermal insulation from recycled materials (0.15 W/m2K)
  • Double glazing (U=0.9 W/m2K)

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