Last month, January, was National Radon Action Month, so now is a great time to learn about this invisible threat that is very common in Iowa and how to mitigate it from your home. Radon is a naturally occurring radioactive gas that can seep into homes from the ground. It is colorless and odorless and can become trapped inside your home causing a potential health hazard. While often undetectable without testing, high levels of radon exposure can significantly increase the risk of lung cancer.

If your home is tested for this potentially dangerous gas and the level exceeds 4pCi/L you will need to have radon mitigation done. Mitigation is when a certified company installs a system to trap the gas and vent it to the outside of your home.

What is Radon Mitigation?

Radon mitigation refers to the process of reducing radon levels in a home to a safe level. Consequently, if your home has elevated radon levels, a mitigation system is crucial to protect your family’s health.

Types of Radon Mitigation Systems

1. Passive System

• This system utilizes natural air pressure differences to draw radon gas from beneath the concrete slab. A pipe is installed in the soil beneath the slab and extends above the roofline. The difference in air pressure between the warmer air inside the pipe and the cooler outside air creates a natural draft, drawing radon gas up and away from the home.  
• Benefits: Relatively simple to install and typically less expensive than active systems.
• Considerations: May not be as effective in all situations and may require modifications.  Therefore, still needing to activate the system if initial testing shows inadequate radon reduction.

2. Active System

• How it works: This system utilizes a powerful fan to create suction beneath the concrete slab. A pipe is inserted through the slab and into the soil. The fan pulls radon gas from the soil, through the pipe, and vents it safely away from the house, typically through the roof or a sidewall.
• Benefits: Generally more effective than passive systems, especially in situations where natural air pressure differences are insufficient.
• Considerations: Requires electricity to operate and ongoing maintenance, including fan inspections and filter replacements.

Important Considerations:

• Regular Testing: Even with a mitigation system, regular radon testing is crucial to ensure its effectiveness. It’s recommended to test every 2-3 years.
• Maintenance: Follow the manufacturer’s recommendations for regular fan maintenance to ensure optimal performance.