Renewing Your
​C-DET Credential

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The CSIA Certified Dryer Exhaust Technician (C-DET) credential must be renewed every three years.

Take the Online Review

Complete a review course, either online or in-person.​ ​The online review is also part of a CSIA eLearning subscription.

OR

Take the Exam

Take and pass the exam again:

• with an in-person proctor
• with the online proctor, ProctorFree
• ​after an in-person review

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Note: If your certification is lapsed more than 30 days and you have an expired certification, you must start the certification process over.