Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
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AfterFast, Reliable HVAC Cleaning Across St. Augustine
Air Duct Cleaning in St. Augustine typically costs $325 – $575 for a full system, covering the supply and return ducts, air handler, blower assembly, and evaporator coil. Most jobs take four to six hours and include before-and-after photo documentation of every component. If your AC is running constantly, cycling oddly, or the house smells musty every time the system kicks on, this is the fix. Our crews serve St. Augustine from Vilano Beach to World Golf Village. Call (737) 727-2314 for a written quote before any work begins.
Why Cardinal Air Duct Cleaning Is St. Augustine’s Preferred HVAC Cleaning Company
Omar Haddad built our St. Augustine operation around one promise: a written price before a single duct is touched. That matters here because the coastal housing stock runs old. Homes in Lincolnville, Abbott Tract, and the historic downtown grid often have crawlspace ductwork that has never been properly cleaned. Our technicians know what a 1920s bungalow’s return plenum looks like, and they know what a salt-corrosion pattern on an evaporator coil looks like. We do not send a generalist. We send a technician who has cleaned dozens of systems just like yours, in your zip code.
The HVAC Cleaning process we run follows the same protocol every time: camera inspection first, then source removal with Rotobrush agitation tools and Nikro HEPA-filtered negative pressure, then component-by-component cleaning of the blower, evaporator coil, and air handler cabinet. Afterward, you get before-and-after photos. Not stock photos. Photos of your ducts, your coil, your blower wheel.
We are part of the Relay Home Co. family, founded 2005, and every booking comes with The Relay Standard: a live trackable arrival window, a written price before work starts, before-and-after photo proof, and a digital invoice you can pay from your phone. A live person answers calls 24/7. No voicemail roulette. That is the whole point.
AC Cleaning in St. Augustine
AC Cleaning in St. Augustine addresses the entire air pathway inside your system: the blower wheel, blower housing, evaporator coil, drain pan, and the interior of the air handler cabinet. Coastal humidity and salt aerosol are the big drivers here. Salt particles settle on the blower wheel and coil, then moisture from the air binds them into a paste-like layer that reduces airflow and feeds microbial growth. A clean system moves air properly. A coated one runs longer, costs more to operate, and smells bad.
What We Clean
We pull the blower assembly, degrease the wheel and housing, evacuate the condensate pan, and clean the evaporator coil with a coil-safe cleaning agent. Every step is photographed. You see what we saw.
When St. Augustine Homeowners Need It
Every three to five years is the honest interval for most St. Augustine homes. Homes closer to the beach, or with pets, or in historic areas with crawlspace returns may need it sooner. A full AC cleaning in St. Augustine runs $275 – $425 as part of a complete system cleaning.
Evaporator Coil Cleaning in St. Augustine
Evaporator Coil Cleaning in St. Augustine is the single highest-value service we perform, because the coil is where salt corrosion and biofilm accumulate first. The evaporator coil sits directly in the airstream. When it is coated with a salt-dust matrix, the system cannot transfer heat efficiently. The AC runs longer, the coil sweats more, and the added moisture feeds the very growth you are trying to remove. This is not a cosmetic issue. It is a mechanical one.
The Process
We access the coil, apply a non-acidic coil cleaner, let it dwell, then rinse with low pressure to protect the fins. Afterward, we treat the coil with an antimicrobial coat. This slows regrowth in St. Augustine’s humid, salt-heavy air.
Cost and Timing
Evaporator coil cleaning alone in St. Augustine runs $165 – $280. We recommend it as part of the full HVAC cleaning package, because cleaning the coil without the ducts just pulls dirty air over a clean coil within weeks. The full package is the better value.
Trusted Brands We Service in St. Augustine
We work on all major HVAC brands: Carrier, Trane, Goodman, Rheem, American Standard, and more. What matters more is the equipment we bring. Our trucks carry Rotobrush rotary brush systems, Nikro HEPA-filtered negative pressure units, and Abatement Technologies containment equipment. That is the professional-grade standard. We also stock Guardsman and Aprilaire filtration products for St. Augustine customers who want to upgrade their filtration after a cleaning. If your system uses a specific filter size or media type, we likely have it on the truck. If not, we bring it on the return visit at no extra trip charge.
Common HVAC Cleaning Problems We See in St. Augustine Homes
- Salt crust on evaporator coils: St. Augustine homes within two miles of the coast show measurable salt deposits on coils within three years. Ocean air carries sodium chloride aerosol, and your system pulls it in constantly. The salt binds with dust and becomes a thick, insulating crust that kills efficiency and smells sour.
- Crawlspace duct leakage in historic districts: Lincolnville, Abbott Tract, and Fullerwood have hundreds of homes with original crawlspace ductwork. Unsealed joints pull in humid, musty air from under the house. We camera-inspect every return and supply run before cleaning. Sealing comes later, but you have to see the leak first.
- Blower wheels caked with salt-dust paste: The blower wheel spins in the airstream 24/7. Add coastal humidity and you get a paste that throws the wheel out of balance. That is the vibration you feel when the system first kicks on, and the price tag for ignoring it is a new blower motor, not a cleaning.
- Recirculated dust from cheap cleanings: A shop-vac cleaning without negative pressure simply loosens debris and blows it back through the supply vents. We position a HEPA-filtered negative pressure unit at the air handler so everything we dislodge goes into a sealed container, not your living room.
Pricing for HVAC Cleaning in St. Augustine, FL
A complete HVAC cleaning in St. Augustine runs $325 – $575 for a typical single-system home. That is one flat price per system, agreed before work starts. Smaller condos and homes with a single return and short duct runs sit at the lower end. Larger homes with dual systems, multiple returns, or crawlspace ductwork sit at the upper end. We do not charge per vent. We do not add a “coil fee” midway through the job. The written quote you receive is the price you pay, full stop. We also provide evaporator coil cleaning alone at $165 – $280 and AC cleaning at $275 – $425. Call (737) 727-2314 and we will walk your system over the phone and give you a firm range before we ever step foot in St. Augustine.
We Also Serve Cities Near St. Augustine
Beyond St. Augustine, our crews cover the broader Northeast Florida and state region, including HVAC Cleaning in St. Augustine nearby communities and surrounding metros. We run scheduled routes to Jacksonville, Miami, Tampa, and Orlando. Dispatch is coordinated from our Miami office, and crews serve St. Augustine locally. Call to confirm your area and get a written estimate.
Serving St. Augustine, FL - Our Local Coverage Area
We’re based in the St. Augustine area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About HVAC Cleaning in St. Augustine
Every three to five years is right for most St. Augustine homes. Homes within a mile of the coast, homes with pets, and older homes with crawlspace ductwork trend toward the three-year mark. Salt aerosol from the ocean accelerates coil and blower fouling faster than inland Florida homes. If you have never had the system cleaned and the house is ten years old or more, you are overdue. Call (737) 727-2314 and we can camera-inspect your ducts to tell you exactly what you are dealing with before you commit to anything.
One flat price per system, written before we start. No per-vent pricing, no add-ons at the door. The price you agree to is the price you pay. Per-vent pricing is a common upsell trap in St. Augustine’s older housing stock, where homes may have 12 to 20 registers. We quote the whole system, air handler and blower included, in one number.
Yes, and we do it on every job. You receive a photo report showing the blower wheel, evaporator coil, return ducts, and supply ducts before and after we clean them. These are photos of your system, taken during your appointment, not stock images. The Relay Standard includes this documentation with every booking in St. Augustine.
Not with the setup we run. We use HEPA-filtered negative pressure from Nikro units, meaning the air inside the duct system is pulled outward through a HEPA filter, not blown into your rooms. Loose debris goes into a sealed containment unit. For homes where mold is present, we recommend a separate assessment first, because cleaning alone will not resolve an active moisture problem. Call (737) 727-2314 to talk through what you are seeing.
Usually, yes. The musty smell comes from microbial growth on the evaporator coil and in the drain pan, fed by condensation and St. Augustine’s year-round humidity. Cleaning removes the organic matter, and the antimicrobial coil treatment slows regrowth. If the smell returns within a few months, the issue is standing water from a clogged drain line or a cracked pan, which we can diagnose during the cleaning visit.
Written by Omar Haddad, owner of Cardinal Air Duct Cleaning. We serve St. Augustine and surrounding Florida communities. Call (737) 727-2314 for a free, written estimate.