Radon in buildings

Abstract (II ERA workshop, Prague 2014)


Johan Wintheim, Independia Group, Sweden

Today’s European environmental targets (Directive 2002/91/CE, Directive 2010/31/UE, and finally Directive 2012/27/UE) set out how we will try to reduce our energy consumption both in terms of per person as well as per household.

What then, for various measures to implement and how these affect our indoor environment? In Scandinavian has been since the 70s supplementary isolated exchanged warm-ups and facades with government subsidies, all in order to save heating costs.

The presentation intends to highlight examples of what has become of radon levels in places that implemented changes in order to save heating costs. What are the implications of this?

In Sweden, it is currently impossible to install F-vent in apartment buildings without being connected to heat recovery. The problem this creates out in the provinces is the fact that property owners do not have the financial means to solve their radon problem, where the action costs more than what the property is worth.

In today’s newly built villas, it becomes more and more common that you install a mechanical supply and exhaust, how that property owners check that the changes in the system does not reinforce the negative pressure in the home and creates conditions for radon that will enter the residence. In other hand, such measures involve an extra energy, in heating or cooling system, to maintain indoor thermal comfort. This can result in an additional cost to the annual bill.

In older properties have been from the beginning assumed that oil / wood will create 0.5 oms / h to maintain a good indoor environment. In today’s society, so most people choose to switch heating to geothermal heat pump / geothermal heat, which then alter the conditions for an efficient extraction. It thus provides no control on vent causing thermals control ventilation. This results in an increased risk of intrusion of radon.

It is hoped that the subject of this presentation will instigate discussion and debate among the audience.