Track D · IAQ
Indoor Air Quality Inspection Certification
Master a systematic process for measuring indoor air quality, interpreting the readings, and recommending corrective actions, and prove it with a credential homeowners, building managers, and clients trust.
Get certified online — certificate the same day.
- Self-paced
- Instant certificate
- 2-year validity
- Format
- Online, self-paced
- Lessons
- 6 lessons
- Exam
- 10 questions
- Pass mark
- 75% · retries
- Certificate
- Same day
- Validity
- 2 years
Earning potential
How much can you earn?
Technician hourly
$22-40 / hr
Self-employed inspection ticket
$250-600+
Owner potential
mid five-to-six figures
Illustrative ranges — actual earnings vary by location, effort, and experience, and are not guaranteed.
Why it pays
Why get certified?
Win inspection work
Homeowners, landlords, and property managers hire technicians who can document a clear, repeatable assessment process and explain what the numbers mean.
Charge more
Understanding instruments, baselines, and ventilation lets you offer a complete assessment with a written report instead of competing on a cheap walk-through.
Build trust fast
A verifiable credential reassures a worried client who suspects a problem with the air their family or tenants are breathing.
Start or grow a business
IAQ concerns pair naturally with restoration, HVAC, and home-inspection services, giving you a billable add-on or a standalone offering.
Curriculum
Inside the Indoor Air Quality Inspection course
6 self-paced lessons, then a 10-question exam — 75% to pass, unlimited retries.
- 1
Common Indoor Pollutants and Their Sources
Indoor air quality work starts with knowing what you are actually looking for. The pollutants you will encounter most often fall into a few groups, and each has predictable sources you can trace during a walkthrough.
- 2
Basic Instruments and Taking Readings
A solid IAQ assessment depends on using the right instrument correctly. You do not need a lab; you need reliable field tools and good technique.
- 3
Interpreting Readings and Reference Ranges
Collecting data is only half the job; clients pay you to tell them what it means. Use widely accepted reference ranges as guideposts, and always interpret a reading in context rather than as a pass or fail.
- 4
Ventilation Assessment
Most chronic IAQ complaints trace back to ventilation, so learning to assess it is central to the trade. Ventilation is simply how outdoor air is brought in, distributed, and exhausted to dilute and remove indoor pollutants.
- 5
Radon Awareness and Referral
Radon is one of the few IAQ hazards you cannot see, smell, or detect with a general air-quality meter, so awareness and proper referral are essential parts of a credible inspection.
- 6
Reporting and Recommending Corrective Actions
Your report is the product clients keep, so it has to be clear, honest, and actionable. A good IAQ report turns a set of readings into a plan a homeowner or manager can follow.
Curriculum
What you’ll learn
- Identify common indoor pollutants and their typical sources, including particulates, VOCs, carbon dioxide, carbon monoxide, and excess humidity.
- Select and operate basic field instruments such as particle counters, CO2 monitors, CO meters, hygrometers, and low-cost VOC sensors.
- Take representative readings using correct placement, timing, and outdoor baseline comparisons.
- Interpret measurements against widely used reference ranges and recognize when a result signals a real concern.
- Assess whether a space has adequate ventilation and fresh-air supply for its occupancy and use.
- Recognize when radon testing is warranted and explain the EPA action level and the referral path to occupants.
- Document findings in a clear written report with readings, observations, and prioritized recommendations.
- Recommend practical corrective actions, from source control and ventilation changes to filtration and specialist referral.
What's included
Everything you get with enrollment
One price — the course, the exam, the certificate, and the tools to put it to work.
Self-paced lessons
Practical, standards-based lessons you can start, pause, and finish on your own schedule.
A real certification exam
A short multiple-choice exam that confirms you absorbed the material — 75% to pass.
Instant certificate
Pass and download your personalized Certificate of Completion the same day.
Unique verification ID
Every certificate carries an ID anyone can confirm online — proof customers trust.
2-year validity + renewal
Your credential is valid for two years, with a simple renewal path before it expires.
Free Find-a-Pro listing
Once certified, claim a free listing so homeowners in your area can hire you.
The process
How it works
Enroll & pay
Secure checkout, instant course access.
Complete the course + short quiz
Self-paced lessons, then a short quiz — 75% to pass, unlimited retries.
Download your certificate
Personalized certificate generated instantly, with a unique verification ID.
Your credential
Your certificate
- Holder name and course title
- Unique certificate ID
- Issue date and expiry date (2-year validity)
- Online verification by ID
A NISCR Certificate of Completion confirms completion of NISCR training and examination. It is a professional credential, not a government license. Where local law requires a license to perform a service, the technician is responsible for obtaining it.
Certificate
of Completion
This certifies that
Your Name
has completed
Indoor Air Quality Inspection
- Certificate No.
- Valid
- NISCR-IAQ-2026-XXXXXX
- 2 years
Keep going
Related certifications
Questions
Frequently asked questions
- Is this a license?
- No. A NISCR Certificate of Completion is a professional credential confirming you completed NISCR training and examination. It is not a government license. Where local law requires a license to perform a service, you are responsible for obtaining it.
- How fast do I get the certificate?
- Same day. As soon as you complete the course and pass the short exam, your personalized certificate is generated and available to download, typically the same day you enroll.
- Does my state require a license for this work?
- It varies. Some states or municipalities regulate certain inspection, HVAC, or radon-related work, while others do not. Check your local requirements; this certification complements, but does not replace, any license your jurisdiction mandates.
- How long is the certificate valid?
- Two years (24 months) from the issue date. You will be eligible to renew, and we will remind you before it expires.
- Is there an exam?
- Yes, a short exam with a 75% pass mark and unlimited retries. It confirms you absorbed the core material on pollutants, instruments, and corrective actions.
- Can I learn at my own pace?
- Yes. The course is fully self-paced and online, so you can start, pause, and finish whenever it suits you.