Make a MINT from Dryer Lint. 

Whether you're seeking to start a new business or provide a valuable add-on service to existing customers, earning the CSIA Certified Dryer Exhaust Technician (C-DET) credential, the ONLY nationally recognized credential for dryer vent cleaning, can be a huge benefit to your bottom line.

The CSIA Certified Dryer Exhaust Credential is awarded following the study and completion of an exam based on the C-DET manual.

​Since the credential was created, homeowners around the country have connected with qualified technicians near them through the "find a CSIA Certified Technician" search tool on the CSIA website. 

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Quick facts about the C-DET credential: 

• Once certified, you will never have to re-take the exam
• Credential is good for a three year period
• To re-credential every three years you only need to take the online review
• No annual maintenance fee
• Credential holders earn valuable referrals from both www.csia.org and
  ​www.dryersafety.org.
• C-DET logos are aggressively protected from trademark violations through all legal avenues

Get up to date emails about C-DET certification events

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3 Ways to Earn Your Credential

2-Day Certified Dryer Exhaust Technician Workshop

​Hands-on training program held at the CSIA Technology Center (Plainfield, IN). The only facility of its kind, it was built specifically to train chimney and venting technicians. Course concludes with exam. Topics covered: 
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• Basics of how dryers work, how to disassemble as needed for cleaning

• Proper venting and clearances
• Rerouting damaged or unusable vents
• Dryer vent cleaning and maintenance tools
• Dryer vent testing and cleaning
• Technician safety
• Marketing your business​

Register for the 2-day workshop

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On Your Own

After studying the C-DET manual on your own:

1. Complete the online review* (included with a CSIA-SureFire eLearning subscription)
   
2. Pass a proctored exam

*The C-DET online review is not required before taking the exam, but it is strongly recommended.

Take the Online Review

Take a Proctored Exam

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1-Day CSIA Certified Dryer Exhaust Technician® Review & Exam

​The in-person review sessions offer an extensive review of the C-DET Manual and the opportunity to ask questions of CSIA’s experienced and knowledgeable instructors.  The review is designed to prepare you for the CSIA Certified Dryer Exhaust Technician® exam which follows the conclusion of the review. Students should have read and studied the C-DET Manual prior to attending the review session. 

Register for a 1-Day review & exam

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CSIA Certified Dryer Exhaust Technician® Manual

Whether online or in-person, any prospective candidate will need a copy of the CSIA Certified Dryer Exhaust Technician® Manual.

The manual can be purchased here – digital or print. You may also order the manual when registering for a related event. 

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Order the C-DET Manual

About the Exam

The C-DET exam tests on the CSIA Certified Dryer Exhaust Technician® Manual and is 50 questions, requiring an 80% passing grade.

The exam must be taken in the presence of an exam proctor (online via ProctorU or in-person).  Click here for information on the proctored exam process. 

Then, order your paper or electronic exams through CSIA (above). For the paper exam, please allow at least 10 business days prior to your exam appointment to ensure delivery; electronic exams must be requested at least 72 hours before your exam date. Paper exams will be returned by the proctor to CSIA for grading and additional processing. Online exam results are available immediately.

online exams are closed for maintenance

When registering online, please register for the event/month that correlates with the month you have scheduled your exam (example: if exam is in August, register for the Aug 1-31 event.)

You may also order your exam through CSIA by phone/email/mail/fax. Download the Proctored Exam form here.