Mold issues in HVAC systems and air ducts occur due to humidity and water accumulation in the system.
What should I do if I discover mold on my vents?
You'll want to start by turning off your heating/cooling unit to prevent the further spread of any spores. Remove the air vent grill and place it in a basin of warm soapy water for one hour. While it is soaking, use a HEPA vacuum to clean the inside of the air vents. Use a rag soaked in soapy water to scrub the vent grill and air ducts clean. Allow everything to air dry thoroughly before turning your heating/cooling unit back on.
Additionally, if you suspect that mold is growing internally in your heating/cooling unit, you should contact your local HVAC contractor to have it inspected.
How do I prevent mold from growing in my HVAC system?
Regularly scheduling preventative maintenance can help prevent mold infestations before they start.
It is also important to replace air filters regularly, maintain the drain pans, keep air ducts dry, and use disinfectants.