Duct Leak Testing
Manometer and pressure-pan tests measure real leakage in CFM, not eyeball estimates.
Ductwork Repair & Replacement in Philadelphia
Leaky, crushed or undersized ducts waste up to 30% of the air your HVAC produces — and are the #1 reason a Philly rowhome has a hot second floor and a freezing basement. We test the duct system, seal what we can save, and rebuild what we can't.
Diagnose, seal, or replace — matched to the house
Philadelphia's housing stock ranges from 1900s rowhomes with retrofit ducts wedged into pipe chases to postwar twins with unsealed sheet-metal trunks in the basement. Every duct job starts with a static-pressure and leak test so we know whether sealing, patching, or a full replacement is the right call — no guesswork.
Aeroseal & Mastic Sealing
Interior aerosolized sealant plus hand-applied mastic at every joint, boot and takeoff.
Trunk & Branch Repair
Rebuild collapsed flex, replace crushed elbows and reconnect disconnected boots in attics and crawl spaces.
Full Replacement
New rigid metal trunks and insulated flex sized to Manual D — sized for your actual system, not the last one's ducts.
Zoning & Balancing
Add dampers and adjust registers so second floors and back bedrooms actually get their share of air.
Return Air Corrections
Undersized returns starve the blower. We add returns, upsize grilles and cut chase panels where needed.
Signs your ducts are the problem
If two or more of these sound familiar, the ducts — not the equipment — are likely the culprit.
Hot 2nd / Cold 1st Floor Weak Airflow At Registers Whistling Or Rumbling Ducts High Electric / Gas Bills Dust Reappears Days After Cleaning Visible Disconnected Duct Sweating Ducts In Summer Never Replaced (30+ yrs)
What leaky ducts actually cost a Philly homeowner
Duct leakage isn't just a comfort problem — it's an energy, health and equipment-life problem.
01
Up To 30% Energy Loss
Energy Star estimates the typical home loses 20–30% of conditioned air to duct leakage. On a $300 monthly bill, that's $60–$90 vented into your basement.
02
Shortens Equipment Life
Undersized or leaky duct systems raise static pressure, which cooks blower motors, cracks heat exchangers and shortens compressor life.
03
Pulls In Attic & Crawl Dust
Return-side leaks act like vacuums, pulling insulation fibers, mouse dander and moisture into the air you breathe.
04
Rowhome-Specific Issues
Retrofitted rowhome ducts often use undersized 6" flex snaked through pipe chases — right-sizing them is usually the single biggest comfort upgrade you can make.
Which one does your house need?
Seal & Repair
Full Replacement
- Best For
Ducts 15 yrs or younger, sound layout, leakage under 20%.
Ducts 25+ yrs, undersized flex, or leakage above 25%.
- Typical Cost
$1,200 – $3,500 depending on accessibility.
$4,500 – $12,000 for a full first-and-second-floor rebuild.
- Downtime
One day — system back online the same evening.
2–4 days depending on size, minimal drywall impact when planned.
- Efficiency Gain
5–15% reduction in runtime.
20–35% reduction plus room-to-room balance.
- Warranty
3-year sealant warranty.
10-year workmanship warranty on new duct system.
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Duct replacement across Greater Philadelphia
We know Philly rowhomes, twins, split-levels and colonials — and how their duct systems were built (or bodged) over the years.
Philadelphia
Rowhomes, trinities and twins across Center City, South Philly, Fishtown and the Northeast.
Bucks County
Split-levels and colonials in Feasterville, Langhorne, Newtown and Doylestown.
Montgomery County
Ranches and 2-stories in Willow Grove, Abington, Ambler and Jenkintown.
Delaware County
Havertown, Media, Springfield and Broomall — plus older Main Line homes.
A+ Rated
Fix the ducts, fix the house.
Book a free in-home duct assessment. We'll leak-test your system, mark trouble spots on a walk-through and quote both seal and replace so you can choose.
Ask about our duct-and-equipment bundles — replace a system and the ducts together and we credit the leak test toward the job.
Same-Day Response
Fast dispatch across Philly, Bucks, Montgomery and Delaware counties.
Licensed Technicians
EPA-certified pros who explain the work before we start.
A+ BBB Rated
Transparent pricing and honest recommendations, every visit.
Upfront Pricing
Flat-rate quotes — no surprises once the job begins.