TinnerFlow™3rd YearGrease DuctRED · Stop / Verify
A grease duct change of direction needs cleanability/access per the approved code/detail. Do not close the shaft or wrap the duct until cleanout access is verified.
Grease duct is not just air duct. It has to be inspected, cleaned, and maintained. If an elbow/change of direction has no cleanout or access method, the system may be impossible to clean after construction.
Check the grease duct drawings, hood submittal, NFPA/code requirements as adopted by the job, and manufacturer/listing for the access door. Likely recovery is adding an approved cleanout/access door in the correct location before the duct is wrapped or enclosed.
Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.