Mold in Your King of Prussia Air Ducts? See It on Camera, Then Get One Flat Price
Musty smell when the AC kicks on. Dark specks on the registers. Allergies that flare indoors. The free camera inspection shows you what is actually inside the ducts; if it is mold-contaminated dust, deep source-removal cleaning starts at $650 per HVAC unit plus $200–$550 for an EPA-registered sanitizer, quoted flat and in writing before we start.
- Free video inspection
- Source-removal deep cleaning
- EPA-registered sanitizer
- After-photos of every line
- Google Guaranteed
Is that mold in your ducts? Often it is: growth on dust at the coil, the plenum or a diffuser, where warm humid air meets cold metal. We put a camera in the system for free and show you. If it is there, we remove the contaminated debris and sanitize the cleaned surfaces; if it is in your walls or subfloor, we tell you that too and point you to a remediation specialist.
How do homeowners usually notice it?
- A musty, damp-basement smell for the first minute after the AC or heat starts, then it fades — until the next cycle.
- Dark specks, fuzz or a grey film on the supply registers, especially ceiling diffusers in bathrooms and bedrooms.
- Allergy or asthma symptoms that are worse at home and ease when you are out for the day.
- Condensation or rust around the air handler or the plenum seams.
Why do ducts grow mold in the first place?
Moisture. The evaporator coil and the supply plenum next to it run cold and wet all summer, and dust that settles there has everything it needs. A clogged condensate drain, a leaking humidifier or an unsealed return pulling air from a damp basement will do the same. Humid summers here mean the older twins in Pottstown and Spring City with damp stone basements, and the attic air handlers in newer Limerick and Skippack homes, are both common cases. The camera usually shows where the moisture is coming from, and we tell you what to fix so it does not come back.
What do we do about it?
- Free camera inspection. Camera into the supply and return lines, plenum and coil housing; you watch the screen. Twenty minutes, no obligation.
- Flat written quote. Deep cleaning at $650 per HVAC unit plus sanitizing at $200–$550, or a custom number if contamination is heavy.
- Source-removal deep cleaning. Nikro negative pressure with HEPA filtration, whips and agitation tools on every line; registers and diffusers cleaned by hand.
- EPA-registered sanitizer. Applied to the cleaned surfaces per the label, with proper dwell time before the system runs. Details on the sanitizing page.
- After-photos and video. The same diffusers and lines you saw on the inspection, clean.
What we do not do
We do not open walls, drywall or subfloor; growth in the structure of the house is a job for a remediation specialist, and if the camera points there, we tell you before you spend a dollar. We do not take air samples, send anything to a laboratory or certify anything. And we keep the health talk honest: many homeowners tell us the musty smell is gone after the job, and that is the claim we make.
What "Clean" Looks Like on Camera
What does it cost?
| Service | What it covers | Starting at |
|---|---|---|
| Air Duct Deep Cleaning | Source-removal cleaning of the full system, contaminated dust and debris removed — per HVAC unit | $650 |
| Duct Sanitizing | EPA-registered antimicrobial applied to the cleaned system — per HVAC unit | $200–$550 |
| Heavy Contamination | Extensive growth, multiple units or coil-housing work | Quoted after free inspection |
| Camera Inspection | Video inspection of the ducts, plenum and diffusers | Free |
These are starting prices. Every house is different, so your exact flat quote comes in writing after the free video inspection, before any work begins.
Two HVAC units? A multi-unit discount applies to the second system. Heavy contamination is quoted after the inspection, flat and in writing. See the pricing page for every service.
Why is the inspection free, and why would we tell you no?
Because the camera is the only honest way to sell this job. A musty smell can be a dirty filter, a wet basement or a clogged drain line rather than growth in the ducts, and we would rather spend twenty minutes finding that out than clean a system that did not need it. Our own Google reviews include a homeowner we told to wait rather than book a deep cleaning. We cover Upper Merion, Chesterbrook and the 422 corridor out to Pottstown and Pennsburg — see all service areas — with evening and Sunday windows.
Guarantees That Actually Mean Something
Three written guarantees on every job, from the company that has been doing this out of King of Prussia since 2016.
If a problem traced to our work shows up within 6 months, we come back and make it right at no charge.
If lint builds back up in your dryer vent within a year of our cleaning, we re-clean it free.
Bring a competitor's written quote for the same scope of work and we match it.
Google has screened our license and insurance, so the Google Guaranteed badge shows on our Business Profile.
Mold in Air Ducts — Questions
Is mold in air ducts dangerous?
It is not something to leave alone. Growth on duct dust sheds spores into the airstream every time the blower runs, and many homeowners with allergies or asthma report symptoms easing after a contaminated system is cleaned. We keep health claims measured; the practical answer is to get the camera in and remove what is there.
Can you test the mold to tell me what kind it is?
No. We do not take air samples or send anything to a laboratory, and we are not a remediation contractor. What we do is show you the growth on camera, remove the contaminated debris from the duct system by source-removal cleaning, apply an EPA-registered sanitizer, and photograph the result.
Can I just spray bleach into the vents?
Spraying anything into a register treats the first foot of a line that may run forty. It does nothing for the dust the growth is living on, and bleach in a duct system leaves a smell of its own. The fix is removing the contaminated material under negative pressure, then treating the cleaned surface.
Will the mold come back after cleaning?
Not if the moisture that fed it is addressed. Cleaning and sanitizing remove what has grown; a clogged drain line, a leaking humidifier or an unsealed return in a damp basement will grow it again. The inspection and after-photos usually show where the water is coming from, and we tell you what to fix.
How long does a deep cleaning with sanitizing take?
Plan on four to five hours for a single-system home: deep cleaning of every supply and return line, hand-cleaning of the registers and diffusers, sanitizer application with its dwell time, and after-photos. Two units or heavy contamination can run into a second visit. The written quote includes the time window.
What does it cost for a house with two HVAC units?
Deep cleaning is $650 per unit and sanitizing $200–$550 per unit as starting prices, with a multi-unit discount on the second system. The exact flat number depends on system size and how far the growth has spread, which is why we quote it in writing after the free inspection. Call (484) 367-5944 to schedule.
See What Is Growing in Your Ducts — Free
Call (484) 367-5944 for a free camera inspection. If it is there, you get one flat written price to remove it and treat the system. If it is not, you have your answer for nothing.
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