Existing Duct Cannot Be Positively Identified Before Remodel Demolition

This existing duct is shown for demolition, but I cannot positively trace it to the listed system and it still appears active. I checked the current demo and controls drawings. Do you want the system identified and isolated before we cut it?

Grease Duct, Kitchen & Industrial Exhaust 2nd Year RED

Stop if

Stop before changing specialty exhaust, fire/life-safety work, shutdown conditions, controls, structural support, waterproofing, manufacturer-specific requirements, or occupied-space protection without the responsible direction.

Watch out

Do not cut a duct because it looks abandoned, has dust on it, or is missing a label.

Check

current drawings and affected system tags
grid/location and measured conditions
photos showing the conflict or temporary condition
relevant equipment, hood, controls, roofing, or store information
what has already been checked

Say this to your foreman

existing duct cannot be positively identified before remodel demolition existing duct identify before demolition grocery remodel active abandoned duct stop demolition until the duct is traced and its current service, airflow, connected equipment, controls, dampers, and downstream areas are verified. existing drawings and abandoned-looking duct are not enough by themselves. this existing duct is shown for demolition, but i cannot positively trace it to the listed system and it still appears active. i checked the current demo and controls drawings. do you want the system identified and isolated before we cut it?

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