Air Quality Insights
Practical guidance on radon, mold, and home air quality from the certified professionals at DezAir Quality Testing.
Latest Posts
Tips, facts, and local insights for Chicagoland homeowners and buyers.
How Does Radon Testing Work? Step-by-Step | DezAir
From scheduling to your final report — here's exactly what happens during a professional radon test, start to finish. ...more
Professional Radon Testing Process
November 02, 2026•1 min read
Do Buyers Need Radon/Mold Testing Before Closing? | DezAir
Neither test is always legally required, but both are common and valuable parts of due diligence before closing on a home. ...more
Home Buyer Radon & Mold Testing
October 26, 2026•1 min read
What Radon Level Is Dangerous? EPA Guidelines | DezAir
The EPA recommends action at 4 pCi/L or higher. Levels between 2–4 pCi/L are considered elevated. Here's what those numbers actually mean. ...more
Radon Levels & EPA Action Guidelines
October 19, 2026•1 min read
How Do I Know If My Home Has Radon? | DezAir
You can't see, smell, or taste radon. Testing is the only way to know for certain whether it's present in your home. ...more
Radon Detection & Home Testing
October 12, 2026•1 min read
What Is Radon? A Homeowner's Guide | DezAir
Radon is a naturally occurring radioactive gas you can't see, smell, or taste. Here's what it is, where it comes from, and why testing matters. ...more
Radon Awareness & Home Safety
October 05, 2026•1 min read
Mold Testing vs. Air Quality Testing: What's the Difference? | DezAir
Mold testing looks for a specific problem. General indoor air quality testing covers a broader range of factors. Here's how to tell which one you need. ...more
Mold Testing vs. Indoor Air Quality Testing
September 28, 2026•1 min read
Air vs. Surface Mold Sampling: Which Do You Need?
Air sampling measures airborne mold spores; surface sampling checks specific materials. Most tests use both — here's why. ...more
Air Sampling vs. Surface Sampling for Mold
September 21, 2026•1 min read
Mold Testing vs. Mold Inspection | DezAir
A mold inspection is a visual check. Mold testing collects lab samples for documented results. Here's the difference and why it matters. ...more
Mold Testing vs. Mold Inspection
September 14, 2026•2 min read
Signs of a Mold Problem in Your Home | DezAir
Musty smells, discoloration, and allergy symptoms can all point to mold. Learn the warning signs and why testing is the only way to know for sure. ...more
Mold Inspection & Prevention
September 07, 2026•1 min read
What Happens If Mold Is Found? | DezAir
A mold finding isn't a crisis — your report explains what's present and what it means, with next steps if remediation is warranted. ...more
What to Do When Mold Is Found in Your Home
August 26, 2026•1 min read
Health Symptoms of Mold Exposure | DezAir
The EPA and CDC note mold exposure can contribute to allergy symptoms, respiratory irritation, and worsened asthma in sensitive individuals. ...more
Mold Exposure & Health Symptoms
August 26, 2026•1 min read
Radon & Mold Testing Timelines for Closings | DezAir
Both tests typically take about 3 business days — here's how to plan testing around a real estate closing timeline. ...more
Radon & Mold Testing Timelines for Real Estate Transactions
August 26, 2026•1 min read
How Much Does Mold Testing Cost? Full Breakdown | DezAir
Mold testing starts at $375 and covers up to 1,000 sq ft. Here's what's included and how pricing scales for larger properties. ...more
Mold Testing Costs & Pricing Guide
August 26, 2026•1 min read
How Long Does Mold Testing Take? | DezAir
On-site collection takes about 30 minutes. Lab processing and your written report bring total turnaround to roughly 3 business days. ...more
Mold Testing Timeline & What to Expect
August 26, 2026•1 min read
Why Mold Testing Includes an Outdoor Baseline | DezAir
An outdoor sample isn't testing for a problem outside — it's a comparison point that makes your indoor results meaningful. ...more
Outdoor Baseline Sampling in Mold Testing
August 26, 2026•1 min read