Coil pull space is a service clearance, not leftover space. If duct or hangers block the coil removal path, the run needs to be held before it becomes permanent.
Do not install duct or hangers where they block required service access.
Check
Identify which unit and which coil is at risk. AHUs may have cooling coils, heating coils, or other components that slide out for service.
Find the coil-pull direction and required clearance in the equipment submittal or manufacturer drawing. Do not guess from the field layout.
Measure the available clear space in the coil-pull direction and compare it to the submittal requirement.
Determine what is blocking the path: duct route, transition, hanger rod, trapeze, brace, piping, conduit, or another trade.
If the duct is already in place and blocking coil pull, mark it, photograph it, and escalate before insulation or finish work traps the problem.
Steps
Identify which unit and which coil is at risk. AHUs may have cooling coils, heating coils, or other components that slide out for service.
Find the coil-pull direction and required clearance in the equipment submittal or manufacturer drawing. Do not guess from the field layout.
Measure the available clear space in the coil-pull direction and compare it to the submittal requirement.
Determine what is blocking the path: duct route, transition, hanger rod, trapeze, brace, piping, conduit, or another trade.
If the duct is already in place and blocking coil pull, mark it, photograph it, and escalate before insulation or finish work traps the problem.
Say this to your foreman
My duct run is within [measurement] of the coil-pull side on [unit tag]. The submittal shows the coil pulls [direction] and needs [required clearance]. I think I have a service-clearance conflict. Do you want me to hold until this is resolved?