NV Energy
Today one of our HVAC technician received a call from a homeowner in Centennial Hills 89130, she told us about a musty odor coming from her central air conditioning system. The unit was a 5-year-old Trane XR14 split-system, known for its reliability and efficiency. The woman was trully distressed about a persistent, musty odor coming from her air conditioning system. We also learned that the smell had gradually become worse and was making the entire house unbearable lately, even though the AC seemed to be functioning properly.
As soon as our technician arrived at client's home, he was immediately struck by the strong, unpleasant odor that filled the air. Mrs. Clark mentioned that she had already changed the air filter and tried using air fresheners, but nothing had helped. Robert, our air conditioning specialist decided to start with a thorough inspection of the air handler and ductwork.
- Air Handler and Evaporator Coil:
- Model: Trane XR14
- Details: This unit featured a high-efficiency variable-speed blower motor, which provided consistent temperature control and improved energy efficiency.
- Condition: Upon inspection, the air handler and evaporator coil were found to be in good condition. The coil was clean, indicating regular maintenance had been performed.
- Ductwork:
- Type: Metal ductwork with fiberglass insulation
- Issue: During the inspection, we discovered a small tear in the insulation around the ducts in the basement. This tear allowed moist air from the basement to enter the duct system.
- Problem: The moist air led to condensation inside the ducts, creating a perfect environment for mold growth. Mold spores spread throughout the ductwork, causing the musty odor Mrs. Jenkins noticed.
Mrs. Clark home was equipped with a split central air conditioning system, consisting of an outdoor condenser unit and an indoor air handler connected to a network of ductwork. The air handler, located in the attic, housed the evaporator coil, blower motor, and air filter.
Upon checking the air handler, Robert noticed that while it was clean and well-maintained, the smell seemed to be coming from deeper within the duct system. The air handler was a mid-range, 3-ton unit from a reputable brand, about 7 years old. As soon as our HVAC tech ensured that the evaporator coil was clean and not the source of the smell, he crawled into the attic to access the main ducts and soon discovered the root of the problem: a small section of ductwork had detached slightly from the main trunk line, creating a gap that allowed air to escape and moisture to enter.
This section of the ductwork was made of flexible, insulated material commonly used in residential HVAC systems.
Closer inspection revealed signs of water damage and mold growth inside the ducts. It seems that the combination of high humidity and the small gap in the ductwork had created the perfect environment for mold to thrive. The summer season brought high humidity levels, exacerbating the moisture problem within the ducts. The gap allowed warm, humid air to condense inside the cooler ducts, promoting mold growth.
The mold was responsible for the musty odor that was permeating her home.
Robert advised Mrs. Clark on the immediate steps needed to address the issue. He used specialized HVAC mastic sealant and foil-backed duct tape to securely seal the gap in the ductwork to prevent further moisture from entering. Also he recommended hiring a professional mold remediation service to clean and sanitize the affected ducts.
Mold remediation and HVAC UV-C Lights
Upon arrival the mold remediation team used industrial-grade HEPA vacuums and antimicrobial treatments to clean and disinfect the ductwork. They also installed UV-C lights inside the air handler to inhibit future mold growth.
After the mold remediation was completed, Robert returned to ensure that the ducts were thoroughly cleaned and that the air quality in the home was restored. He also performed a full AC system maintenance check, including cleaning the evaporator coil, checking refrigerant levels, and ensuring all connections were secure.
The ducts were sanitized, and the air quality was restored.
The homeowner noticed an immediate improvement in indoor air quality once the mold remediation was completed.
Our tech is also suggested installing a whole-house dehumidifier integrated with the existing HVAC system to control humidity levels and prevent future mold growth. The Energy Star-rated dehumidifier unit is designed to work in conjunction with the air handler, effectively reducing indoor humidity levels to around 50%.
HVAC inspections and maintenance
This real-life case highlights the importance of regular HVAC inspections and maintenance, especially in preventing and addressing issues like mold growth that can lead to unpleasant odors and potential health hazards.
Schedule regular duct inspections, especially before the summer season, to detect and address any potential issues like this early.
Annual professional inspections and the installation of the dehumidifier will help to maintain a comfortable and healthy indoor environment.
