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Dirty HVAC Filter Causing Mold Damage
TAGGED IN //   Mold   Restoration Tips   Cleaning  
10.20.2016

Dirty HVAC Filter Causing Mold Damage

Have you changed your HVAC filter recently?

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If not, you could be facing a problem similar to this…

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Recently, at First Restoration Services, we have seen an increased number of calls for mold being present in a home or apartment and they all have one thing in common; extra humidity because of a dirty filter or open makeup air dampers in the HVAC. Home air filters typically range from $20-50 and should be replaced whenever they are dirty, but a general rule of thumb is once every quarter. A dirty HVAC filter can prevent your unit from working properly. A/C units are designed to work with a certain amount of internal airflow and if that isn’t being met the A/C may not be removing the correct amount of moisture out of the air. This can result in mold growing on surfaces of your home. Additionally, the A/C units may malfunction and ultimately fail. It can also raise your energy bill as your system struggles to take in the air.

On our recent projects, the property owners thought they had a water problem, such as a leaky pipe or roof, causing mold to show up in various areas of their home such as their ceilings, cabinets, furniture, etc. However, after using a thermal camera (reads temperature of materials to help determine if something is wet) and a moisture meter (water moisture detection device) we quickly found that there was, in fact, no wet or damaged building material. What was happening was mold was growing on the surface of everything because of the spike in humidity.  Mold will start to grow on surfaces where the air is at or above 60% relative humidity.  The ideal relative humidity for health and comfort is about 30-50%. We are finding the relative humidity in these homes to be 70% or higher.

So what to do?

First things first, check your filter and replace if needed.  Secondly, if you see visible mold, call FRS. First Restoration Services can come out and inspect your home to determine the plan of action. In some instances, it may be necessary to get the affected space tested and receive a site-specific cleaning protocol written by an Industrial Hygienist.

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The protocol for remediating mold typically requires removal of mold affected building material, HEPA vacuuming, hand wiping all affected areas with an anti-microbial solution, contents and softgoods (clothing, etc) to be cleaned off-site.

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First Restoration Services has completed numerous types of these jobs over the past several weeks, all with a similar issue; a dirty HVAC filter that had not been changed in a long time and high relative humidity.

Who is at Risk?

  • Residents/Tenants
  • Elderly/Small Children
  • Property/Structure
  • Selling a Property
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