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Re:Why is my dryer radioactive? by Kon-Peki on Thursday May 18, 2023 @01:51PM (#35991622)
Most of the cost is the installation of equipment in the existing home. In areas of the country that have a lot of radon, it's not uncommon to install the equipment during construction of the house foundation, which then only adds a few hundred dollars to the total cost.

> Radon-resistant new construction (RRNC) typically costs a builder between $250 and $750. RRNC could cost less than $250 if the builder already uses some of the same techniques for moisture control.

https://www.epa.gov/radon/radon-resistant-new-construction-h...

Re:Why is my dryer radioactive? by hinkley on Thursday May 18, 2023 @04:52PM (#35993879)
Not uncommon as in it's building code in those areas.

Tricky bit I think is when you live in a state with small pockets of radon instead of broad regions. Then you're back into crapshoot territory.