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Indoor radon problem in energy efficient multi-storey buildings.

I V Yarmoshenko1, A V Vasilyev2, A D Onishchenko2

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Energy-efficient buildings with reduced air exchange trap more radon gas. This study found higher indoor radon levels in modern, energy-efficient multi-storey buildings compared to older structures.

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Area of Science:

  • Building Science
  • Environmental Health
  • Radiological Protection

Background:

  • Modern energy-efficient buildings utilize advanced construction and insulation, significantly reducing building envelope air permeability.
  • Reduced air exchange rates in these buildings create conditions conducive to the accumulation of indoor radon gas.

Purpose of the Study:

  • To investigate the problem of elevated indoor radon concentrations in energy-efficient multi-storey buildings.
  • To compare indoor radon levels in modern energy-efficient buildings with those constructed prior to energy-saving initiatives.

Main Methods:

  • Radon concentration measurements were conducted in seven modern multi-storey buildings using a radon monitoring method.
  • Air exchange rates and other indoor climate parameters were estimated in the studied buildings.

Main Results:

  • A notable increase in indoor radon concentration was observed in energy-efficient multi-storey buildings in Ekaterinburg, Russia.
  • These levels were significantly higher compared to similar buildings constructed before the widespread adoption of energy-saving technologies.

Conclusions:

  • Energy-efficient building designs, while beneficial for energy savings, can inadvertently lead to increased indoor radon accumulation.
  • Further research and mitigation strategies are needed to address radon risks in modern energy-efficient housing.