The basic criteria for mitigation systems in Illinois are the following:
- Effective in reducing radon
- ALARA – As Low as Reasonably Achievable
- Permanent, unobtrusive, and quiet
- Durable and capable of indicating system failure
- Economical to install, operate, and maintain
- A system function indicator
- A primary suction point independent of the sump pit
- Sump covers with observation ports
- Exhaust above the highest eave and away from vents, windows and other areas of possible re-entry into the home.
The Two Approaches to Mitigating Radon
- Passive System
- Relies on convective airflows to vent radon naturally without the power of a fan.
- Active System
- Relies on ventilation powered by a fan to draw radon from under the home to the outside.