HVAC touches almost every trade: framing, electrical, plumbing, roofing and ceilings. Coordinating the mechanical contractor early keeps the ceiling space, the schedule and the inspections on track.
In this article
Early submittals
Get equipment submittals approved early. Long lead times on rooftop units and air handlers set the schedule.
Ceiling space
Ductwork is the largest item above the ceiling. Lay it out first, then sprinkler, plumbing and electrical around it.
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Roof and wall openings
Confirm curb sizes, roof penetrations and wall louvers with the framer and the roofer before they close in.
Deliveries and lifts
Plan crane picks or lifts for rooftop equipment, and protect units stored on site.
Rough-in inspections
Schedule mechanical rough-in before insulation and drywall, and walk it with the superintendent.
Startup and balancing
Book startup, test and balance with time before turnover, and give the owner the reports.
Common mistakes
Late equipment orders, ductwork installed after other trades and balancing squeezed into the last week.
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Frequently asked questions
When should the HVAC contractor start coordinating?
Before framing. Equipment sizes, roof openings, duct routes and ceiling heights need to be settled while walls and structure can still change easily.