Radon Gas Levels in Ireland: Health Risks and Ventilation Solutions

Radon gas is a naturally occurring, invisible, and odourless radioactive gas that forms from the decay of uranium in soil, rock, and groundwater. It can enter homes through cracks and gaps in foundations, floors, and walls — especially where buildings are in direct contact with the ground.

Many Irish homes are located in high radon areas, making radon exposure a serious health concern. Without proper ventilation systems, radon levels can build up indoors to unsafe concentrations.

Why Is Radon Gas Dangerous?

Radon is the second leading cause of lung cancer after smoking. Long-term exposure to high radon levels in Ireland significantly increases the risk of developing lung cancer — even among non-smokers. According to the Environmental Protection Agency (EPA), one in every five homes in certain parts of Ireland may have radon concentrations above the recommended safe limit.

You can view the Radon Map of Ireland to check if your area is classified as a high-radon zone.

How to Protect Your Home from High Radon Gas Levels in Ireland

While radon is unavoidable outdoors, indoor accumulation can be managed. Mechanical Ventilation with Heat Recovery (MVHR) and Demand-Controlled Ventilation (DCV) systems can significantly improve indoor air quality by maintaining continuous airflow.

Continuous Air Exchange

MVHR systems ensure a steady supply of fresh outdoor air while removing stale indoor air — effectively diluting any radon that may have accumulated.

Balanced Air Pressure

MVHR and DCV systems maintain neutral pressure inside the home, reducing the negative pressure effect that can draw radon gas from the ground.

Reduced Radon Concentration

Although MVHR systems do not directly filter radon, continuous air movement prevents gas buildup in enclosed spaces, supporting healthier air quality.

Note: MVHR is a supportive solution, not a replacement for professional radon remediation. In high-risk areas, additional methods such as radon sumps and barriers may be required.

Practical Steps to Lower Radon Gas in Ireland

Test your home with an EPA-approved radon test kit.
Seal visible cracks in floors, foundations, and walls to limit gas entry.
Install a professional radon barrier or sump if your home is above safe levels.
Improve ventilation using an MVHR or DCV system to reduce radon gas accumulation.

If you’re unsure whether your area has high radon levels, use the EPA Radon Map or check Radon.ie for testing and mitigation guidance.

Need Help Improving Indoor Air Quality?

Concerned about radon or ventilation in your home? Our experts at Eco Vent Ireland can assess your property and recommend the right solution. We design and install MVHR systems that improve air quality, reduce moisture, and help lower radon exposure.