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radon system follow-up test 4

https://writehollow.com/s/4ZzveP_gmJzR7lc4np2sl

After installing a radon mitigation system, we came back to do a follow-up test to make sure the fan and sealing are working as expected. This involves placing a second short-term test kit in the lowest livable area, leaving it for at least 48 hours during closed-house conditions, and sending it to a lab. The results tell us if the system really reduced radon levels and if any tweaks are needed.