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Symptoms of Black Mold in HVAC System

Symptoms of black mold - General information

Molds reproduce by creating tiny spores. These spores constantly waft through the indoor and outdoor air and if they land on a damp area indoors, they instantly begin to grow and multiply, using what they are growing on to survive. Bacteria, mold and mildew are living organisms that can thrive on almost any surface, requiring only dampness and a source of food, making air conditioning an ideal location for bacteria and mold to develop.

Symptoms of black mold in A.C system

Mold is able to grow on all parts of heating, ventilation and air conditioning systems.

If insulation is present, mold is likely to grow there. Otherwise, it's probable that mold will grow in the cooling coil or condenser, and the drain pan. These are found in the air handler in central air systems.

Air entering the system under the dew point is cooled by the cooling coil so condensation in the air is removed. This results in condensation building up on the coil which exposes it to potential biological of living organisms including mold bacteria.

Under the coil is the drain pan and here any drops of condensation from the coil is collected. The water found in the drain pan can serve as the optimum conditions for mold to grow. This is especially true if the pan is flat, where the stagnant water increases the possibility of mold growth. An in-duct humidifier can add excess moisture to the ducts and, when joined with grime and dirt, mold can develop in the ducts.

Mold can Grow Anywhere

Black mold growth in air ducts and air disperses
Black Mold in air ducts
Combination of bacteria, mold and mildew form a thick layer of jelly blocking the unit drainage and producing bad odors in to the atmosphere.
Black mold growth on and around indoor evaporative coil

Symptoms often associated with black mold and bacteria development in AVAC systems (phenomenon known as the "Sick Building Syndrome):

  • Headaches, shortness of breath and fatigue
  • Coughing, sneezing and sinus congestion
  • Eye, throat, nose and skin irritation
  • Dizziness and nausea

Due to a variation in people's sensitivities, it is accepted that one person may suffer from the symptoms above when another person in the same region may not suffer from any symptoms.

Most susceptible people to poor indoor air quality are:

  • Individuals who suffer from asthma or allergies
  • People suffering from respiratory diseases
  • People with a compromised immune system
  • Those who wear contact lenses

A few simple steps can help you keep your domestic and central HVAC system free of all unwanted growth of black mold, mildew and bacteria development, and the outburst of illnesses associated with poor air coning from the air conditioning system.

1. Maintain clean filter in the unit constantly.

2. Have the unit inner coil (evaporative coil) cleaned every 3-4 month using the suitable product according to the coil condition – if coil has only a light layer of dust, the Eco-Clean should be sufficient to have it clean, if the coil accumulated a thick layer of dust and organic sediment then a foaming product like the Gab-Coil should be implicated in order the extract deposits from deep in the coil.

3. When the coil is clean, the unit should be disinfected. The Clean-Air is a biocide, eliminating and controlling future growth of organic contaminants that frequently cause poor indoor air quality and "sick building syndrome" at the source of the system. Clean-air eliminates mold, mildew and slime deposits. Clean-Air is a user friendly formula so evacuating the premises during application is unnecessary. Application is by the sprayer provided or using any manual or electrical sprayer for central air conditioning units.

4. After coil has been disinfected unit drain pan should be treated. Placing the Pan-Clean-Tab will prevent any damage caused by plugged drains and keep you drain pan mold and bacteria free for up to 6 month.

Keeping these simple steps will insure a safer and better air quality in your indoor environment and help you protect your family from the risks associated with the Sick Building Syndrome.



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