Preventing Mold in an HVAC System

Published by: Elizabeth Gormley
Published on: 2010-01-10 15:26:13

Mold grows where there is moisture, so heating, ventilation, and air conditioning systems are likely areas where unwanted mold spores can begin to thrive. Mold can use the machines as a vessel to get to different areas of the home. Mold spores can cause anything from mild flu-like symptoms to severe allergic reactions, chronic health problems, and even life-threatening illnesses. HVAC systems are generally out of sight, and they have piping and drain pans ideal for spores to grow and cause potential sickness. The key to prevention means understanding the parts of the system, and how each one may breed mold.

Ducts
This is where the air distribution takes place. In the past, HVAC ducts were installed with an interior lining. However, this lining was often porous and trapped dirt along with moisture. Consider replacing old duct lining with a smooth, nonporous material. Watch for leaks and water damage around the ducts.

Drain Pans and Coils
As air-conditioning coils cool, they create condensation that drips into a drain pan and exits through a sloped seal trap. Invest in double-sloped drain pans that will ensure the least amount of leftover water. Modern drain pans are also made out of corrosion-resistant materials. Any standing water in the drain pans has the potential to create a mold environment. Enough growth will clog the drain line of your HVAC.

Air Filters
HVAC technicians should replace your air filters seasonally. This will eliminate any spores accumulating on the old ones. If winter is coming, they should tend to the heating system. If summer is on its way, the air conditioning filter should be replaced. Fans should be turned off when filters are being replaced to avoid the spread of spores.

Dehumidifying and Humidifying Equipment
These machines deal directly with moisture. Empty the drain pan of a dehumidifier as often as possible. Clean the duct linings of your humidifier. No duct lining should remain moist from water spray. If you use these HVACs regularly, you might want to hire a technician to drain and treat the entire system.

There are certain symptoms your HVAC will exhibit in the case of mold growth. Listen for a change in its sound. Is the system performing inefficiently? Are the filters excessively dirty or damp? Is the system old in general? If so, you might consider a new HVAC. Modern systems are built with mold-resistant materials. The also operate more efficiently and can save you a bundle on energy bills.

In the case of HVAC mold growth, your best bet will be to call a remediation professional. Technicians will have the proper chemicals and know-how to kill existing spores while preventing new ones in the future.

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