AC Repair Services › Duct Replacement Service
Duct Replacement Service in Portland, ME
Duct replacement means removing sections—or all—of your existing duct network and installing properly sized, sealed replacement ductwork. It's necessary when ducts are crushed, disconnected, filled with old insulation, or so undersized that the HVAC system strains to move air. Cleaning won't fix a duct that's collapsed or leaking 30% of its air into the basement. We assess what's salvageable and what needs to come out.
Portland AC Repair Pros provides duct replacement service for homeowners across Portland, ME. Call for a free inspection and a written quote before any work begins.
When to Call
When You Need Duct Replacement Service
- Your basement flex duct has collapsed sections that cleaning equipment can't pass through
- Rooms at the far end of the house barely feel any airflow regardless of thermostat setting
- An inspector found disconnected duct joints pumping conditioned air into the crawlspace
- Your attic ductwork was crushed during a roofing job and hasn't been right since
How It Works
Our Process for Duct Replacement Service
- 1
Airflow and Duct Audit
We trace the duct layout, measure static pressure, and identify which sections are failing before removing anything.
- 2
Demo and Removal
We pull out the failing sections carefully, checking connections at the air handler and each register for collateral damage.
- 3
New Duct Fabrication and Install
Replacement duct is sized to the system's actual airflow needs, not just matched to whatever was there before.
- 4
Sealing and Insulation
All joints are mastic-sealed or taped with foil tape, and runs through unconditioned spaces are wrapped with the correct insulation rating.
Portland Context
Why this matters in Portland
Portland homes built in the 1950s through 1970s frequently have undersized round duct systems designed for gravity heat conversion. Those systems never performed well and replacement—not cleaning—is the correct fix.
Straight Talk
About pricing & scope
Cost is driven by linear footage, accessibility, and whether the existing trunk line is salvageable. Attic and crawlspace work costs more than basement replacement because conditions are harder to work in.
What This Fixes
Problems We See in Portland
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