Ductwork is the part of the system no one thinks about until rooms are uneven, bills are high, or the vents are noisy. In older Pittsburgh homes especially, ducts are often undersized, poorly sealed, or added onto over decades in ways that starve some rooms and overfeed others. Werth-Aire repairs, seals, modifies, and installs ductwork so the air your equipment produces actually reaches the rooms.
Leaky ducts are a quiet money-loser — air conditioned or heated at real expense escapes into basements, crawlspaces, and wall cavities before it ever reaches you. We find and seal leaks, correct duct sizing and design issues using Manual D principles, add returns where a system is starved for return air, and quiet down ducts that boom and rattle. When a system is being replaced, getting the ductwork right is what lets the new equipment perform to its rating.
The payoff is comfort and efficiency: even temperatures floor to floor, quieter operation, better airflow, and a system that does not have to run as hard to keep up.
Need ductwork repair & install in Pittsburgh?
Same-day appointments · honest flat-rate pricing
Signs of a ductwork problem
- Some rooms never heat or cool like the rest of the house
- Weak airflow from certain vents
- Loud banging, whistling, or rattling ducts
- High energy bills despite a working furnace and AC
- Excess dust from unsealed ducts pulling in debris
- A newer system that still can’t keep the home comfortable
What our ductwork repair & install covers
Duct sealing
Finding and sealing leaks that waste heated and cooled air into unconditioned space.
Repair & modification
Fixing damaged, disconnected, or poorly added-onto ductwork in older homes.
Design corrections
Resizing runs and adding returns with Manual D principles so airflow is balanced.
New installation
New ductwork for additions, renovations, and system replacements done right.
Our process
Airflow assessment
We evaluate airflow, return capacity, and duct design to find where the system is losing or mis-delivering air.
Seal & repair
We seal leaks, repair damaged sections, and correct connections that leak conditioned air into unconditioned space.
Correct the design
Using Manual D principles, we resize runs and add returns where the system is starved for air.
Verify balance
We confirm improved airflow and more even temperatures across the home.
Why perfect equipment still can't fix bad ducts
You can have a flawless furnace and AC and still be uncomfortable if the ductwork can't deliver the air. In older Pittsburgh homes especially, ducts are often undersized, poorly sealed, or added onto over decades in ways that starve some rooms and overfeed others. Leaky ducts quietly lose heated and cooled air into basements and crawlspaces before it ever reaches you. We find and seal leaks, correct sizing and design with Manual D principles, add returns where a system is starved for air, and quiet down ducts that boom and rattle. When you replace a system, getting the ductwork right is what lets the new equipment perform to its rating.
What affects the cost
Ductwork projects are quoted to the scope. Cost drivers include:
- The extent of sealing versus repair versus new duct installation
- Accessibility of the ductwork in basements, attics, and walls
- Whether returns must be added or runs resized
- Coordination with a system replacement
We scope ductwork to the actual problem — sealing, repair, or redesign — and put the plan in writing so you know what you are paying for and why.
| Symptom | Likely cause | Fix |
|---|---|---|
| Uneven room temps | Undersized runs or leaks | Reseal / resize / add returns |
| Weak airflow | Starved return or blockage | Add return air capacity |
| High energy bills | Leaky ducts | Seal the leaks |
| Noisy ducts | High static pressure | Resize and balance |
Why choose Werth-Aire for ductwork repair & install
You can have a perfect furnace and still be uncomfortable if the ducts cannot deliver the air. We fix the distribution — leaks, sizing, and returns — so every room finally gets what it is supposed to.
Serving Pittsburgh since 2015
11+ years keeping North Hills and Allegheny County homes comfortable through hard winters and humid summers.
4.9★ across 51 reviews
Local homeowners rate us for straight answers, clean work, and pricing with no surprises.
Licensed, insured & EPA-certified
EPA Section 608 technicians installing to ACCA Manual J/S/D standards, with the proper Pittsburgh permits pulled on every install.
Flat-rate pricing, 24/7 response
A written quote before we start, the diagnostic fee explained up front, and around-the-clock help when it can’t wait.
Ductwork Repair & Install across Pittsburgh & the North Hills
From our base on the Perry Highway corridor, we bring ductwork repair & install to homes across Allegheny County and Western Pennsylvania. That includes Ross Township, McCandless, West View, Bellevue, Avalon, and Shaler Township, plus the South Hills, the river boroughs, and the wider metro. See every community on our HVAC service areas page, or call (831) 461-3437 to confirm we cover your street.
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Related reading
- Old Pittsburgh Homes: Adding AC Without Ductwork — Love your historic Pittsburgh home but suffering through humid summers with no AC? Ductless mini-splits add efficient cooling without ductwork.
- Humid Pittsburgh Summers: Fixing Indoor Humidity — If your Pittsburgh home feels clammy even with the AC running, the problem is humidity, not temperature. Here is how to actually fix it.