Duct Repair & Replacement in Boynton Beach
A room that never cools, dark marks on the ceiling, a system that runs and runs? The problem is often in the attic, in the ducts. We go up, take photos, and fix what is actually broken.
Serving Boynton Beach, Delray Beach, Boca Raton, Lake Worth Beach, Wellington, Greenacres, Lantana and the rest of Palm Beach County.
Or text us a photo of the problem
4.9★ on Google · 200+ reviews · Licensed & insured CAC 1818673 · Family-owned in Boynton Beach
Why duct problems are worth fixing, and who fixes them
In most South Florida homes the ducts run through an attic that gets far hotter and more humid than the house. A loose connection there dumps cold air into the attic and pulls hot, dusty air in. You pay to cool the attic, the far rooms stay warm, and the system never gets a break.
Ocean Air & Residential is a family-owned air conditioning company based in Boynton Beach with more than 200 five-star Google reviews. We have handled more than 90 duct repair and replacement jobs since 2022: resealed connections, rebuilt plenums and return boxes, reconnected and re-supported flex, relocated runs, and full duct replacements, in Boynton Beach, Delray Beach, Boca Raton, Lake Worth and Wellington.
Most duct problems are repairs, not replacements, and we say so. When the ducts are original and failing, we tell you that too, and show you why. You are not going up in the attic, so we bring the attic to you in photos.
Signs your ducts need attention
The first sentence of each is what it usually means; the rest is what we do about it.
One room never cools. Usually a disconnected, crushed, or kinked flex run, or a leaking connection that loses the air before it reaches the room. We trace the run from the plenum to the register.
Dark streaks or spots on the ceiling. Marks around a vent, light, or fixture can come from air leaking through the ceiling or from moisture above it. We look from the attic side and fix the duct or connection that is causing it.
Ducts sweating or ceiling water stains. Cold ducts sweat in a humid attic when the insulation or seal is broken. The water drips onto the ceiling. We reseal and re-insulate the section.
Dust that comes right back. A leaking return pulls attic dust and insulation into the system. Sealing it is the fix. See also indoor air quality.
System runs constantly, bills are high. Leaky ducts mean the system is cooling the attic. Once the leaks are sealed, the air goes where you are paying for it to go.
Old duct board or brittle flex. Duct board facing tears, tape lets go, and old flex jackets crack. We rebuild or replace the bad sections, or the whole system when it is original and failing.
Moving a vent or return during a renovation. We relocate and reconnect runs so the new layout still gets the air it needs, and test afterward.
What a duct repair visit includes
Attic first, photos throughout, and a straight answer on repair versus replacement.
- An attic inspection of the supply plenum, trunk, flex runs, return, and every connection we can reach, with photos of what we find.
- Airflow checked at the registers so we can compare the rooms that cool with the ones that do not.
- Leaking seams and connections resealed with UL 181 foil tape and mastic.
- Damaged duct-board sections, plenums, and return boxes rebuilt; torn or crushed flex replaced.
- Sagging flex supported so it does not kink, pinch, or lie crushed in the insulation.
- A plain answer on whether a repair will do or the ducts are due for replacement, with the photos to back it up.
Real duct repair and replacement jobs
Photos are from our own jobs. Community and city only; no addresses.
Duct-board trunk repaired and flex connections resealed — Valencia Cove, Boynton Beach (Nov 2025)
In the attic, the facing on a section of the duct-board trunk was stained and broken where the flex runs connect. The damaged section was repaired with new duct board and foil tape, and the flex takeoffs were reconnected and sealed at the trunk and at the ceiling box.
Duct fitting rebuilt and flex runs re-supported — Canyon Trails, Boynton Beach (Dec 2025)
A duct-board fitting in the attic was rebuilt and wrapped with UL 181 foil tape, and the large flex supply runs were reconnected and supported so they do not sag across the trusses or lie crushed in the insulation.
Duct repair in the attic above a stained ceiling — Mizner Falls, Boynton Beach (Aug 2026)
The homeowner noticed dark spotting on the ceiling around a curtain-track bracket. We inspected the ductwork in the attic above and made repairs on the flex runs and the duct junction shown here.
Ducts relocated, reconnected, and tested — Wellington (Aug 2026)
Flex runs were relocated and reconnected to a duct-board distribution box in the attic, with sheet-metal collars at the connections, and the system was tested afterward.
Rotted return box rebuilt under the air handler — Millpond, Boca Raton (Sep 2025)
The plywood return box under a 10-year-old air handler had rotted. We rebuilt and insulated a new return box stand, mastic-sealed the connections, and put the system back together. We also documented the original ducts, about 30 years old, so the homeowner knows what to plan for next.
Attic supply plenum rebuilt and insulated — Floral Park, Lake Worth (Jun 2025)
A new insulated duct-board plenum was built and foil-sealed around an attic air handler that hangs from the rafters on chains, so hot attic air stays out of the supply side.
All original 1960s ducts replaced — condo (Nov 2024)
Every duct in a condo built in the late 1960s was replaced, with changes to send more air to the rooms that were not getting enough. The crew cleaned up before leaving.
“Andrew, Blaise, and Jason came out to our home this week to replace all our air ducts that were original in our condo built in the late 60’s. They were on-time, professional, and knowledgeable. They truly went above any beyond to ensure everything was done right. Andrew had some great ideas to provide better airflow to areas that weren’t getting enough, which is ultimately what led us to use Ocean Air vs. other companies we received quotes from… Overall, they did a fantastic job and took the time to clean up after they were done.”
Duct materials we repair and install
Most homes here use foil-faced fiberglass duct board for the plenum, trunk, and return, with insulated flex duct running to each room. We repair and replace both, with sheet-metal collars at the connections, sealed with UL 181 foil tape and mastic. We work in attics, closets, and condos, including ductwork under an air handler stand and return boxes built into a closet.
Duct repair questions, answered
How do I know if my ducts need repair?
The common signs are a room that never cools, dark marks around vents or ceiling fixtures, water stains on the ceiling, dust that comes back fast, and a system that runs constantly. Any one of those is worth an attic check.
Should I repair or replace my ducts?
Most of the time, repair. A leaking connection, a torn section of duct board, or a crushed flex run can be fixed. Replacement makes sense when the ducts are original and failing throughout, as in a 1960s condo where we replaced every run. We show you the photos either way.
Will you show me what you find in the attic?
Yes. You get photos of the problem and of the repair, so you know exactly what was done without climbing up there.
Can leaking ducts cause dark marks on my ceiling?
They can. Marks around vents, lights, and fixtures often come from air moving through gaps in the ceiling or from moisture above it. We check the attic side to find the cause.
Why are my ducts sweating?
Cold ducts sweat in a hot, humid attic when the insulation is torn or a connection is not sealed. The water drips onto the ceiling. Resealing and re-insulating the section stops it.
Can you move a vent or a return?
Yes. We relocate and reconnect runs during renovations or to fix a bad layout, and test the system afterward.
Do you replace ducts in condos?
Yes. We replaced all of the original ductwork in a late-1960s condo and redirected airflow to the rooms that were not getting enough.
Do you do duct cleaning?
Most of our duct work is repair and replacement. If dust is the problem, tell us what you are seeing; often it is a leaking return pulling in attic dust, and sealing it is the real fix.
Do leaky ducts raise my electric bill?
Yes. Air that leaks into the attic is air you paid to cool. Sealing the leaks sends it to the rooms instead.
Are you licensed and insured?
Yes. Ocean Air & Residential LLC holds Florida license CAC 1818673 and is insured.
Related services and areas
Services: AC repair · Indoor air quality · AC maintenance & tune-ups · AC installation & replacement · All HVAC services
Duct repair in: Delray Beach · Boca Raton · Lake Worth Beach
Page updated September 2026.
Room not cooling, or something off in the attic?
Call or text a photo of what you are seeing. We will tell you if it sounds like the ducts and when we can be there.