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Reply to "New HVAC increased radon levels?"
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[quote=Anonymous]No. It's gas bubbling out of your concrete foundation and decaying rock below it. Occurs naturally. Now, if ventilation in the basement was somehow changed from the old to new system, that's a possibility. Maybe they tightened up piping that was serving as a source of ventilation in the house, which they should have if it was found. Ventilation with outside air and a basement that is not airtight is the solution.[/quote]
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