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 Technician® 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. |
Quick facts about the C-DET credential:
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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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On Your Own
After studying the C-DET manual on your own:
*The C-DET online review is not required before taking the exam, but it is strongly recommended. |
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. |
CSIA Certified Dryer Exhaust Technician® Manual
About the ExamThe 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 ProctorFree or in-person). Click here for information on the proctored exam process. Then, order exams through CSIA. Electronic exams must be requested at least 3 business days before your exam date. |
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.)
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