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How to Breathe Easy When Choosing a Radon Mitigation System

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Safety

This article was originally published in February 2019 and has been updated to reflect the latest information

Radon Removal Methods for Healthy Homes

Whether a home has newly installed radon mitigation systems or requires more robust active solutions, there’s a method to fit every situation. Mitigators should highlight that consistent radon testing, paired with the right mitigation approach, is essential to maintaining safe, healthy homes. Here’s an overview of the available radon mitigation systems to help you communicate the best options to homeowners. 

Detailed Comparison of System Effectiveness

While passive systems can be effective in low-radon regions, they often fall short in areas with higher radon potential. The natural ventilation created by passive systems is dependent on environmental factors like pressure differentials, which can vary seasonally or due to changes in home structure. Active systems, on the other hand, are continuously powered, ensuring consistent radon removal regardless of these factors. 

For homes located in areas with elevated radon levels, particularly in the upper ranges of 4 pCi/L and above, an active system is always recommended. According to studies from the Environmental Protection Agency (EPA), active systems can reduce radon levels by up to 99%, making them much more reliable in high-radon zones. In contrast, passive systems may fail to keep levels below the recommended action threshold in such environments, especially in homes with older foundations, cracks, or shifting soil that allow radon gas to seep in more easily. (EPA) 

Additionally, older homes with foundational cracks or gaps are particularly vulnerable. Passive systems often struggle to prevent radon gas from entering these structures because they rely on natural airflow, which may be insufficient. Active systems, equipped with electric fans, actively pull radon from beneath the home and ensure it is vented safely away. 

Active Radon Mitigation: Continuous, Reliable Protection

Active Soil Depressurization (ASD)  radon mitigation systems go one step further than passive systems by using electric fans to continuously pull radon gas from beneath the home and vent it outside. This active process provides more robust protection, especially in homes with higher radon concentrations or environmental factors that prevent natural ventilation. 

Active systems are relatively low-maintenance, with fans operating quietly and effectively for years. Monitoring systems ensure optimal performance, alerting homeowners when maintenance is needed. Despite the additional electricity use, the cost is minimal compared to the peace of mind active systems provide through constant monitoring and radon reduction. 

Clarification of Misconceptions

A common misconception among homeowners is that a passive system is sufficient for any home or that, once radon levels are low, they will remain constant. In reality, radon levels fluctuate based on a variety of factors, including seasonal changes, environmental shifts, and structural modifications to the home. For example, soil moisture and temperature can alter radon gas concentration, causing previously safe levels to spike unexpectedly. 

Because radon levels are not static, passive systems can become ineffective over time without homeowners realizing the potential risk. Active systems, however, offer continuous protection by maintaining a steady flow of radon removal. This is especially important in homes with variable radon levels, as active systems can prevent dangerous buildups that may occur during changes in weather or structural conditions. As such, mitigators should recommend active systems even in homes where radon levels are currently low, as these systems offer ongoing assurance of safety. 

Comparing the Long-Term Costs and Benefits

While passive systems have lower initial installation costs, active systems provide greater long-term value. The ongoing energy cost of an active system fan, particularly those equipped with energy-efficient EC motors, is often less than $50 per year (ECO Cost Savings). EC motors not only enhance energy efficiency but also offer superior performance, leading to lower operational costs and improved air quality. In contrast, the health risks and potential costs associated with radon-related illnesses far outweigh the savings from a passive system. For mitigators, explaining these trade-offs to homeowners is key to ensuring they make an informed decision.  

With over 10 million Canadians living in homes with high radon levels, it's crucial to recognize the hidden dangers this odorless gas poses. Understanding the risks and taking proactive steps toward testing and mitigation can help protect families and communities across the country. (Link)

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Published October 23, 2024

Technological Advancements: The Future of Radon Mitigation

Recent advancements, such as Fantech’s Pressure Field Extension Diagnostic Kit (PFEDK), make it easier to diagnose radon issues and ensure the correct fan selection. This not only ensures the effectiveness of system performance but also allows mitigators to offer tailored solutions that best fit the home’s specific needs. Modern active systems are quieter, more energy-efficient, and less intrusive than earlier models, making them a preferred choice for today’s homes. 

Making the Right Recommendation

Ultimately, the decision between a passive and active system should be based on the specific radon levels, home construction, and homeowner preferences. Passive systems can work well in low-radon zones, but for continuous, reliable protection, especially in high-risk areas, active systems are always recommended. 

No matter the system, regular testing is the first step in any radon mitigation plan. Every home should be tested to accurately gauge its radon levels. The PFEDK makes system recommendations straightforward, ensuring homes are equipped with the best possible protection against radon.