Air Handler & Ductwork
HVAC mold inspection, a frequent hidden source in Florida buildings.
More than half of indoor mold contamination in Florida originates from the HVAC system, coil condensation, plenum growth, return-side leakage, and ductwork moisture. A standard mold inspection covers HVAC visually, but the HVAC Mold Inspection is a focused deep-dive for buildings where the air handler is the suspected vector.
1 Laboratory Sample Included Typically a surface swab from the air handler
What is an HVAC mold inspection?
An HVAC mold inspection is a focused assessment of the air handler interior, the evaporator coil, the condensate pan and drain line, the blower wheel, the supply plenum, and accessible ductwork, to identify mold growth or moisture conditions inside the air-conditioning system. In Florida the system deliberately cools air below its dew point so water condenses on the coil, which is how it dehumidifies the house. That same coil is therefore wet, dark, and continuously fed with dust for eight or nine months a year, which is why the air handler is the most overlooked mold vector in the state and why whatever grows there reaches every room the system serves. The inspection includes visual scoping of accessible components, verification that the condensate line is draining, and one coil or pan surface sample sent to an accredited laboratory.
What it covers
What's included?
- Air handler cabinet. Coil, plenum, and blower wheel inspected for mold growth and the condensation conditions that feed it.
- Condensate drain and pan. The drain line and pan, where standing water and biofilm start, are checked for backup and growth.
- Return-side ductwork. Visual and moisture check of the return, the side that pulls unconditioned, often humid air into the system.
- Supply ductwork and registers. Visual inspection with targeted sampling where growth is visible or suspected.
- Negative-pressure verification. Where applicable, confirms the system is not drawing contaminated air from attics, wall cavities, or crawlspaces.
- Included surface sample. One coil, plenum, or register surface swab is included and sent to an accredited laboratory.
Optional lab testing
Testing you can add.
One laboratory sample, typically a coil or plenum surface swab, is included. When you need more than a single swab, any of these specialty panels can be added, and the cost is quoted up front:
- ERMI & HERTSMI-2 dust panels. DNA-based mold analysis scored against water-damaged-building markers, frequently requested for CIRS and MCAS medical documentation.
- Mycotoxin testing. Detects the toxins some molds produce, a different question than how many spores are present.
- Pathways™ testing. Microfiber-swab sampling analyzed for peptide-bond protein, collected to manufacturer protocol.
- VOC & formaldehyde testing. Chemical off-gassing measurements for indoor-air-quality concerns beyond mold.
- Endotoxin testing. Bacterial-marker analysis for water-damaged or agricultural environments.
- Legionella water testing. Sampling of building water systems, cooling towers, potable water, spas, and fountains, for the bacteria that causes Legionnaires’ disease.
Add-on panels: ERMI, HERTSMI-2, mycotoxin, Pathways™, VOC, formaldehyde, endotoxin, and Legionella water testing. Every sample ships under chain of custody to an accredited third-party laboratory.
When you need it
When is this service the right fit?
- Musty smell only when HVAC runs
- Visible black or green growth on supply registers
- Tenant or occupant complaints throughout the building
- Post-HVAC service when unsure if the system is contaminated
- Pre-purchase verification on systems older than 10 years
How this service works
What does an HVAC mold inspection actually look at?
In Florida the system cools air below its dew point on purpose, so the coil is wet, dark and fed with dust for most of the year. The inspection follows that logic.
01Air handler interior
Opened and assessed directly, not judged from the return grille.
02Evaporator coil
The surface that is deliberately kept below dew point, and the most common place growth is found.
03Condensate pan and drain line
Where the water the coil removes is supposed to go, and where it goes instead when the line backs up.
04Blower wheel and supply plenum
Downstream of the coil, and therefore downstream of anything growing on it.
05Accessible ductwork
Runs that can be reached and inspected, including boots and connections.
06Sampling where conditions warrant
Surface or air sampling is collected where the assessment calls for it, then analyzed by an accredited laboratory.
Service areas
Where we perform HVAC Mold Inspection.
15 Florida counties from Central Florida to South Florida, the Tampa Bay area, and North Florida. Click the county nearest you for local context.
Honest answers
HVAC mold inspection, answered.
Why is the air conditioner the most common mold source in Florida?
Because it deliberately cools air below its dew point so water condenses on the coil. That is how it dehumidifies the house, and it also leaves the coil wet, dark, and continuously fed with dust for eight or nine months a year.
What gets inspected?
The air handler interior, the evaporator coil, the condensate pan and drain line, the blower wheel, the supply plenum, and accessible ductwork, along with confirmation that the condensate line is actually draining.
Do you service or repair the system?
No. PureSpec documents what is there and refers mechanical work to a licensed HVAC contractor. We do not clean ducts, replace components, or diagnose whether the system is correctly sized or charged.
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