On-Site Walkthrough
Camera Proof
Our Truck. Your Driveway.
Meet The Crew
Whole-home air duct cleaning, sealing, or both — for Charleston homes across South of Broad, The Battery, French Quarter, Harleston Village, Ansonborough, Hampton Park Terrace, West Ashley, James Island, Johns Island, and Daniel Island. NADCA source-removal method. Camera-verified before and after. If we damage a single duct during service, the work is free.
Summer humidity parks above 70% from May through September. Salt air off the Ashley and Cooper carries a fine mineral film through every returned-air system on the peninsula. Live oak pollen and Spanish moss debris coat every surface from late February to early May. All of it finds its way into your duct system, mixes with the dust already there, and gets recirculated through every room twelve times a day. The signs show up as symptoms before they show up as visible dust: a kid who coughs at night, a French Quarter bedroom that smells stale, allergy meds that have stopped working.
Before and after photos from a 2023 South of Broad home. Same duct run. Same camera. Three hours apart.
Three steps between you and a duct system that's actually clean.
All three packages are NADCA-certified, and get the same camera-verified documentation.
Professional NADCA source-removal clean for the whole system. Boosts HVAC efficiency, eliminates odors, cuts allergy symptoms, extends system life.
Everything in the whole-home clean, plus professional duct sealing. Bundle the two and the sealing portion drops from $3,999 to $2,249 — you save $1,750.
Professional sealing for homes with known leaks or HVAC efficiency issues. Stops conditioned air from escaping before it reaches your vents.
No shortcuts. No upsell scripts. No "your coil needs replacing" pressure. Our techs follow the NADCA ACR standard from first vent to last.
When we pull up South of Broad, off Rutledge in Harleston Village, into Hampton Park Terrace, out in West Ashley, or across the bridge to Daniel Island, you'll recognize the truck because it's already parked two doors down most weeks. Our certified duct techs live in Charleston — Academic Magnet, Burke, West Ashley High, and James Island Charter families — they know your block because they drive home through it.
Same family ownership since 1947. Same policy since the start: if our tech damages a duct during a clean, the whole service is free. No asterisk.
These are printed on every invoice. Every visit. Every time.
Real reviews from real homeowners in 29401, 29407, and 29412. We don't cherry-pick.
"We moved into our 2019 South of Broad build in 2022 and my son's asthma got worse every summer. The Coastal tech pulled construction drywall dust out of three return ducts on the first visit. First August we've had with no nebulizer. Not exaggerating."
"Coastal did our whole-home clean, showed us the before/after camera footage on an iPad, and was out in three hours. The tech pointed out our filter was installed backward by the previous owner — fixed it and didn't charge. Two other companies we called tried to push UV light add-ons and mold remediation sight unseen. Coastal just did the work. These guys are legit."
"Historic District house, 1923, plaster walls. Everyone we called either said they couldn't do it or wanted a premium for an old home. Coastal came out, measured the runs, did the whole clean at the quoted price. House smells different. Like, properly different. Wish I'd done this ten years ago."
If your question isn't here, call (843) 256-6257 and a real person picks up. We're on the road Monday through Saturday.
(843) 256-6257One call puts a NADCA-certified duct crew in your driveway — South of Broad to Daniel Island, The Battery to outer West Ashley. We book three to five days out in spring and summer. No deposit required. No obligation if you change your mind.