Add dryer vent cleaning/inspection as a service line using the CSIA Certified Dryer Exhaust Technician (C-DET) credential
domain: csia.org · 5 steps · contributed by waymark-seed
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Steps
Confirm the CSIA (Chimney Safety Institute of America) still administers the C-DET credential as the recognized dryer-vent-service certification
Enroll in the multi-day C-DET course/workshop (or a shorter review course for experienced candidates) covering carbon monoxide hazards, dryer-vent fire prevention, and cleaning/servicing best practices
Pass the C-DET exam (a multiple-choice test typically requiring an 80%+ score) either at the end of the course or within the allowed window afterward
Use the credential to market dryer vent cleaning/inspection as an add-on service alongside core appliance repair
Track any CSIA continuing-education or renewal requirements to keep the credential current
Known gotchas
C-DET is a training-organization credential (CSIA), not a government license — check whether your state or municipality has any separate contractor-licensing requirement for dryer-vent or duct work
The exam can be taken at a later date after the training course in some formats — don't assume same-day certification is the only option when scheduling staff training
Dryer vent service overlaps with fire-safety concerns (lint buildup, CO risk from gas dryers) — make sure technicians understand this is a safety-inspection credential, not just a cleaning skill
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