An independent Home Enviro HVAC mold inspection found that failed plenum tape adhesive on a garage-located air handler had opened a pathway for garage air, dust, fiberglass particles, and mold spores to enter the home's duct system.
Home Enviro was contacted to perform an independent HVAC mold inspection at a Weston, Florida residence after the homeowner reported persistent musty odors and discoloration around several supply vents. The air handling unit for the home was located in the attached garage.
The homeowner had replaced air filters regularly, yet the occupants continued to notice recurring dust and ongoing concerns about indoor air quality, pointing to a source inside the mechanical system itself.
To evaluate the HVAC system, ductwork, and indoor environment, Home Enviro performed the following procedures:
The inspection revealed significant deterioration of the adhesive on the HVAC plenum tape surrounding the air handling unit, creating gaps that allowed contaminated garage air, dust, fiberglass particles, and fungal spores into the system.
HVAC plenum tape is not designed to last indefinitely. As its adhesive ages under heat, humidity, and normal system operation, it loses its bond and separates from the metal it seals. The negative pressure created by the air handler then draws mold spores, dust, fiberglass particles, garage air contaminants, and elevated humidity directly into the system, distributing them throughout the home's ductwork every time the HVAC operates.
Even without an active plumbing or roof leak, failed air sealing around an HVAC system can introduce mold spores and other airborne contaminants into ductwork, affecting indoor air quality throughout a home.
Corrective work should be performed by a qualified HVAC contractor, with Home Enviro providing independent findings and verification.
A selection of original photographs captured during the Weston, Florida inspection. Additional photo documentation and the complete narrative are available in the full case study.
This case demonstrates how a relatively small mechanical failure, the deterioration of HVAC plenum tape adhesive, can contribute to widespread contamination throughout a residence. Early identification of deteriorated plenum seals, combined with proper HVAC maintenance and professional inspection, can help prevent contamination from spreading through the mechanical system.
This page summarizes the key findings from Home Enviro's Weston, Florida HVAC mold inspection. The complete narrative, full methodology, all inspection photographs, and detailed recommendations are published on our Express Mold Inspection case study page.
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