A Colony in Your System Means Whole-Home Contamination
Mold in an HVAC system is categorically different from mold in a single room because the system delivers air to the entire structure. A colony on the evaporator coil, in the air handler housing, or in the duct lining is actively distributing spores to every room every time the system cycles. The occupants of the building are being exposed throughout, and elevated counts in one room simply reflect where the delivery is highest, not where the problem is limited.
The Las Vegas climate creates specific HVAC mold conditions. Systems run heavily for nine or ten months of the year. Evaporator coils accumulate dust, organic material, and moisture from condensation. Condensate drain lines clog with organic buildup. When these conditions combine, the air handler becomes a mold environment that the system then distributes throughout the home. I find this situation in homes across Summerlin, Henderson, North Las Vegas, and throughout the valley with roughly equal frequency it is a system maintenance issue, not a geographic one.
What Mold at the Register Actually Means
Mold visible on or around an air vent register is a downstream indicator. The register is where the air arrives, not where the mold is. A family in the Whitney Ranch area reported symptoms that improved every time they left for a weekend. Air sampling showed Aspergillus counts at six times outdoor baseline in three rooms. The source was the evaporator coil housing. The registers were clean on inspection. The coil was not. Every room in the home was receiving contaminated air on every system cycle and the registers showed nothing unusual on a visual check.
Health Implications
Occupants in homes with HVAC mold are exposed continuously during every waking and sleeping hour spent indoors. The symptoms persistent respiratory irritation, allergy-like symptoms, headaches, worsening asthma are often attributed to outdoor air quality or seasonal allergies when the actual source is the indoor air delivery system. Symptoms that improve when the person is outside or traveling and return when they come home are a strong indicator of an indoor air source. Read more about mold health risks.
What We Do
We inspect the full HVAC system, take air samples from multiple rooms, and confirm the extent of contamination before providing a remediation scope. Remediation of an HVAC system involves cleaning and treating the air handler, coil, and drain pan, and assessing ductwork. We verify clearance with post-remediation air sampling. Read more about our mold removal and odor removal services. Call (702) 442-1126.