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61 replies
11k views
61 replies
Radon in the house!?
The doors are actually often open just to get air circulation, but it's not optimal in the long run. I attempted to cut holes between the WC and the walk-in closet in the basement in the hope that the exhaust in the WC would also help draw air from the living room, but unfortunately, it wasn't that simple. Additionally, if you open the WC door, you suddenly lose ventilation in the living room.
One alternative I've seen is to install an exhaust vent in the living room right at the corner where the chimney runs between the living room and boiler room, but it's by no means a secure solution. There's a high risk that the house will get colder. The green air supply in the living room in the basement is still not optimal, and you get quite cold if you sit on the sofa directly under it.
One alternative I've seen is to install an exhaust vent in the living room right at the corner where the chimney runs between the living room and boiler room, but it's by no means a secure solution. There's a high risk that the house will get colder. The green air supply in the living room in the basement is still not optimal, and you get quite cold if you sit on the sofa directly under it.
Chose to bring in a company that solely works with mapping and analyzing radon in properties. Managed to find one of the few certified companies in this field in Sweden.
In the basement room where we are currently measuring a radon level of 350 Bq/m3, they measured only 0.18 µSv/h. Generally, they measured very low values throughout the house. However, they noted that one of the walls actually measured 0.40 µSv/h, which is slightly higher than the others and just over the threshold value, though not a problem as long as you don't spend all your time there. The wall is most likely built with blåbetong.
What makes it a bit complicated is that they measure in sieverts and not Bq/m3. I understand that these are essentially different measurements (air/radiation) and that the limit values in Sweden are based on Bq/m3, but are of course also based on annual dose in sieverts.
According to the expert, we don't need to do anything about the radon level in our house, but it still raises questions about 350 Bq/m3 in the basement room. Why is this completely irrelevant, and how can it differ so much, from no problems to needing action (according to Swedish guidelines)?
The radon company didn't comment on the RadonEye measurements beyond saying they didn't trust them. Clearly, they can't be held responsible for these devices' values. They suggested measuring with certified dosimeters instead, i.e., long-term measurements.
I tried placing both of our RadonEye devices next to each other and they show almost identical results, differing at most by 50 Bq/m3, but usually no more than 20 Bq/m3.
So how should one think about this? Maybe do some sealing around some conduits and then perform a new long-term measurement with dosimeters.
In the basement room where we are currently measuring a radon level of 350 Bq/m3, they measured only 0.18 µSv/h. Generally, they measured very low values throughout the house. However, they noted that one of the walls actually measured 0.40 µSv/h, which is slightly higher than the others and just over the threshold value, though not a problem as long as you don't spend all your time there. The wall is most likely built with blåbetong.
What makes it a bit complicated is that they measure in sieverts and not Bq/m3. I understand that these are essentially different measurements (air/radiation) and that the limit values in Sweden are based on Bq/m3, but are of course also based on annual dose in sieverts.
According to the expert, we don't need to do anything about the radon level in our house, but it still raises questions about 350 Bq/m3 in the basement room. Why is this completely irrelevant, and how can it differ so much, from no problems to needing action (according to Swedish guidelines)?
The radon company didn't comment on the RadonEye measurements beyond saying they didn't trust them. Clearly, they can't be held responsible for these devices' values. They suggested measuring with certified dosimeters instead, i.e., long-term measurements.
I tried placing both of our RadonEye devices next to each other and they show almost identical results, differing at most by 50 Bq/m3, but usually no more than 20 Bq/m3.
So how should one think about this? Maybe do some sealing around some conduits and then perform a new long-term measurement with dosimeters.
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