Indoor Environments Association - Formerly AARST

Indoor Environments Association - Formerly AARST AARST, now doing business as Indoor Environments Association. www.NRPP.info for questions regarding certification, exams, CE, and more.

For questions, please visit:
www.indoorenvironments.org for questions regarding membership, chapters & more.

09/07/2026

When homeowners search for radon services, they usually start with the businesses they can actually find.

And if your company isn’t showing up locally, you may never get the chance to earn the call.

At The Indoor Environments Symposium 2026, Zan Whitehurst Jones will break down what affects local visibility, what may be holding radon companies back, and practical ways to stand out — without relying on paid ads.

Session: How to Show Up First in Your Local Market (without paying for ads)

📍 Norfolk, Virginia
📅 October 4–7, 2026
IndoorEnvironments.ORG

Knowledge has little value if it stays with one person.A breakthrough becomes meaningful when it's shared.An experience ...
09/07/2026

Knowledge has little value if it stays with one person.

A breakthrough becomes meaningful when it's shared.

An experience becomes valuable when it helps someone else avoid the same mistake.

A lesson learned in the field becomes part of a stronger profession when it's taught to others.

That's why education has always been at the heart of the Indoor Environments Association.

Through conferences, webinars, committee discussions, publications, podcasts, and countless conversations between professionals, knowledge moves beyond individuals and becomes part of something much larger.

When one professional learns, the profession benefits.

When thousands of professionals share what they know, the profession evolves.

**Building the profession starts with people willing to belong.**

*The strongest professions grow where knowledge is shared.*

It’s capped. But is the electret still affected?At The Indoor Environments Symposium 2026, Larry Welch will present rese...
09/06/2026

It’s capped. But is the electret still affected?

At The Indoor Environments Symposium 2026, Larry Welch will present research examining capped electrets and off-position E-PERM sensors configured with L-OO chambers in a high-radon cave environment.

The study asks a very specific measurement question: under extreme radon conditions, can electrets still accumulate signal even when capped or when the chamber is in the off position?

For radon professionals who work with E-PERMs, measurement QA, or unusual field conditions, this is the kind of technical detail that can matter.

Extreme conditions. Controlled question. What did the experiment reveal?

📍 Norfolk, Virginia
📅 October 4–7, 2026
🌐 IndoorEnvironments.ORG

09/06/2026

Why so negative? Sometimes… it’s the building.

Mechanical systems can create negative pressure that changes how radon and other soil gases move into a structure — and that can completely change the mitigation challenge.

Through real-world case studies, Wesley West Hodgden will explore how building systems influence soil gas entry, how to recognize when pressure is driving the problem, and how those conditions should factor into a comprehensive mitigation strategy.

Before you fight the radon, understand what’s moving it.

Join Wes for “Why So Negative?” at The Indoor Environments Symposium 2026.

📅 October 4–7, 2026
📍 Norfolk, Virginia

Learn more and register: IndoorEnvironments.ORG

What happens when we look at radon beyond county and ZIP-code averages?A new study published in the *Journal of Environm...
09/05/2026

What happens when we look at radon beyond county and ZIP-code averages?

A new study published in the *Journal of Environmental Radioactivity* used **19,497 residential radon measurements from Utah** to develop a high-resolution spatial model capable of examining radon patterns at a much finer geographic scale.

The research raises an important question for those of us working in radon policy and public health:

**Are the geographic tools we have relied on for decades still giving us enough information to make the best decisions today?**

In the United States, the EPA Map of Radon Zones remains an important reference, and those zone designations have also influenced where radon-resistant new-construction provisions are applied through the International Residential Code.

Wu and colleagues demonstrate why looking at radon at finer spatial resolution matters. Broad geographic averages can obscure meaningful local variation.

But there is another finding in this paper that deserves just as much attention: **better models still need better data.**

The researchers found that areas with greater testing density provided richer information about fine-scale spatial patterns, while sparse measurement data limited what could be resolved.

That creates an important connection between **radon testing, surveillance, research, and policy.**

More measurements don't just tell us more about the buildings being tested. Collectively, quality measurement data can help us better understand where radon risk occurs and ultimately help inform better public-health decisions.

And no matter how sophisticated our mapping becomes, a prediction of radon potential is not a measurement of an individual building. **The way to know the radon concentration in a building is still to test it.**

Research like this gives us an opportunity to improve both sides of that equation: better testing data and better tools for understanding what those data can tell us.

**Wu Y, et al. (2026). “High-resolution modeling of indoor radon exposure with uncertainty quantification in Utah.” Journal of Environmental Radioactivity, 299, 108141.**

09/05/2026

Radon is invisible. The data doesn’t have to be.

Radon levels can change over time—and understanding those changes can provide valuable context about what is happening inside a building.

Ecosense brings radon measurement and continuous monitoring together with data professionals can see, helping reveal trends and better understand changing radon conditions.

We’re proud to welcome Ecosense as a sponsor of The Indoor Environments Symposium 2026.

Connect with Ecosense in Norfolk and see how technology is helping make the invisible visible.

📍 Norfolk, Virginia
📅 October 4–7, 2026
🌐 IndoorEnvironments.ORG

09/05/2026

Getting a radon test kit into someone’s hands is only the first step. What gets them to actually use it?

Alexis Gigliello of the American Lung Association will share findings from a nationwide assessment of at-home radon test kit programs — examining utilization rates, distribution methods, follow-up reminders, education, and the strategies that help turn access into action.

With programs reporting widely different utilization rates, understanding what works matters.

Join Alexis for “Enhancing At-home Radon Test Kit Usage: Program Analysis and Best Practices” at The Indoor Environments Symposium 2026.

📅 October 4–7, 2026
📍 Norfolk, Virginia

Learn more and register: IndoorEnvironments.ORG

What the device can do is not always the same as what the result can tell you.At The Indoor Environments Symposium 2026,...
09/04/2026

What the device can do is not always the same as what the result can tell you.

At The Indoor Environments Symposium 2026, Kai Wundke will present “Home Radon Testing: The Influence of Marketing Narratives on Public Awareness and Safety.”

The session examines how radon testing is marketed to consumers, where simplified claims can conflict with accepted testing conditions and protocols, and why the way we communicate about measurement matters for consumer safety, scientific accuracy, and public trust.

Kai will also explore examples of marketing messages that may not align with established best practices and discuss the case for clearer industry guidance.

Faster. Easier. Simpler. But is the message still scientifically sound?

📍 Norfolk, Virginia
📅 October 4–7, 2026
🌐 IndoorEnvironments.ORG

When the data doesn’t tell the whole story, where do you look next?Indoor environmental challenges rarely fit neatly int...
09/04/2026

When the data doesn’t tell the whole story, where do you look next?

Indoor environmental challenges rarely fit neatly into one discipline. Building science, v***r intrusion, radon, engineering, research, and field experience often intersect when the answers aren’t obvious.

That’s where some of the most valuable professional conversations begin.

At the Indoor Environments 2026 Radon and V***r Intrusion Symposium, professionals from across these disciplines will come together to share research, challenge assumptions, examine real-world problems, and learn from one another.

What problem would you bring to the conversation?

Explore the program and see what’s waiting for you in Norfolk.

***rIntrusion

09/04/2026

Alaska’s ground is changing. What could that mean for radon?

As marginal permafrost thaws, areas that once limited below-grade construction may become increasingly available for development — raising new questions about foundations, soil gas, and future radon risk.

Paul Goodwin of the Alaska Department of Natural Resources will explore the work underway as Alaska considers the intersection of melting permafrost, changing real estate, new building conditions, and radon.

When the ground changes, we need to understand what changes with it.

Join Paul for “Radon Amongst Melting Permafrost in Alaska” at The Indoor Environments Symposium 2026.

📅 October 4–7, 2026
📍 Norfolk, Virginia

Learn more and register: IndoorEnvironments.ORG



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