Invest in a radon system that is corrosion-resistant, properly insulated in cold climates
https://www.scribd.com/document/1009143037/Radon-Mitigation-St-Louis-Incentives-and-Rebates-to-Know-137784
Invest in a radon system that is corrosion-resistant, properly insulated in cold climates, and routed to discharge radon safely above the roofline.