Radon Knowledge Base

Additional Airthings Monitor Questions

This short topic collects additional Airthings monitor questions that are useful when a homeowner is trying to understand a reading pattern. Airthings and similar devices can help show trends, but placement, averaging period, weather, ventilation, and lower-level use all affect what the number means. American Radon Systems does not sell monitors or endorse one device as the only answer. The practical question is whether the monitor pattern suggests the home or an existing mitigation system should be reviewed. If the average remains elevated or changes after mitigation, Bill can look at the fan, suction path, sump details, crawlspace conditions, passive pipe, or other system details.

Can I use the Airthings as a continuous radon monitor for a rental property?

For the radon side, focus on a reliable current reading and a clear mitigation path if the level is elevated. Real-estate paperwork, repair allowances, rental responsibilities, and closing decisions should be handled by the people managing the transaction. Bill can help with the practical radon part: what the number means, whether mitigation makes sense, and what a proper system would involve. If the reading is 4.0 pCi/L or higher, EPA recommends fixing the home. Between 2.0 and 4.0 pCi/L, EPA says to consider mitigation, especially if the space is used often.

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The home inspector mentioned the Airthings reading was 3.8 pCi/L. Should the sellers fix it before closing?

For the radon side, focus on a reliable current reading and a clear mitigation path if the level is elevated. Real-estate paperwork, repair allowances, rental responsibilities, and closing decisions should be handled by the people managing the transaction. Bill can help with the practical radon part: what the number means, whether mitigation makes sense, and what a proper system would involve. If the reading is 4.0 pCi/L or higher, EPA recommends fixing the home. Between 2.0 and 4.0 pCi/L, EPA says to consider mitigation, especially if the space is used often.

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The house I'm buying has an Airthings showing a long-term reading of 5.7 pCi/L. Should I walk away?

For the radon side, focus on a reliable current reading and a clear mitigation path if the level is elevated. Real-estate paperwork, repair allowances, rental responsibilities, and closing decisions should be handled by the people managing the transaction. Bill can help with the practical radon part: what the number means, whether mitigation makes sense, and what a proper system would involve. If the reading is 4.0 pCi/L or higher, EPA recommends fixing the home. Between 2.0 and 4.0 pCi/L, EPA says to consider mitigation, especially if the space is used often.

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Can I use an Airthings reading as a bargaining tool when buying a house?

For the radon side, focus on a reliable current reading and a clear mitigation path if the level is elevated. Real-estate paperwork, repair allowances, rental responsibilities, and closing decisions should be handled by the people managing the transaction. Bill can help with the practical radon part: what the number means, whether mitigation makes sense, and what a proper system would involve. If the reading is 4.0 pCi/L or higher, EPA recommends fixing the home. Between 2.0 and 4.0 pCi/L, EPA says to consider mitigation, especially if the space is used often.

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Questions are fine too. Call or text Bill, or send your address and contact info, and he will take it from there.

Reviewed by Bill Dahlstrom, Illinois radon mitigation license RNM2018212.