The duct work of a house is how the air from the heating and air conditioning system is transferred throughout the building. Since this is the air that you breathe, it's best if it's clean, which is why there are filters in place. However, if the ducts themselves get dirty with mold or some other contaminant, the filter isn't of any use. You need to clean the ducts to kill the mold.
Things You'll Need
- Spin head vacuum with long hoses
- Plastic sheeting
- Ozone output system
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Cover all furniture with plastic sheeting.
Insert the hose of the vacuum into the various vent openings of the house and suck out the dust. Push the hose into each vent as far as possible. Also suck out the air return duct. In the attic, detach the duct from the system and vacuum it out as well. Reattach it when you are done.
Turn the air system off and cover all but one of the vents and air returns with plastic and tape it down. You don't want air getting into the system. Cover the outside unit with plastic as well. The one vent you leave open is for the ozone system.
Insert the hose of the ozone system into the vent. Cover the opening around it with plastic and tape it down
Run the ozone system for at least an hour. Several hours is better. If it's a large duct system, you can rig up two ozone units in different parts of the house on two different vents. Seal around the hoses so air doesn't get in.