Mold In Air Ducts Big Issue

mold in a vent duct here in RaleighMold in the HVAC system is becoming a big issue in the Raleigh NC area. In the past couple of years I’ve have seen a increase in this service.

The first step in resolving this issue starts with a complete scan and inspection of the system. I need to find the source of the problem and eliminate it. Once the source has been found then we can start the process of remediation the mold.

There are different types of duct work in houses. Houses that are usually 25 years or older, it’s common to find metal duct work. The newer houses usually have plastic corrugated flex line wrapped on the outside with insulation. These surfaces we can treat for mold and 9 times out of 10 get rid of it. The problem you can run into is the surfaces that have insulation.

We can’t treat mold on a porous surface. I can treat the top of it but not the interior of it. So our post inspection we find these areas of concern and do evaluation of whether or not it needs cleaned or tore out. When in doubt tear it out. So once we get the source of our problem fixed we start the cleaning process. We use truck mount negative air machine. The negative air machine are connected to the system and then started. I first clean the entire system.

After the system is clean then we can start applying the chemical.  We start are negative air machine and it puts your entire system under negative pressure. This is a very important step because we don’t want to contaminate the indoor air. By having the system of negative this insures everything in the duct work will be filtered to our machine outside. Also by utilizing the system under negative we are able to sanitize the entire system. The anti-microbial we use comes in a liquid form. So what we do is we put in a machine called a fogger.

The fogger will break this liquid down to a fog. So as we have system under negative pressure we go to every vent in the house and start shooting that fog in to the vent. The positive pressure from the fogger and the negative pressure from our negative air machine will pull the fog through the vent. This will insure that entire system is covered in that anti-microbial. We leave are negative air machine running until the anti-microbial has reacted and dried. This also prevents the release of it in the indoor air. This the only way you can successfully coat the system with the chemical. You need to figure this, if you just take that fogger and shoot it down the duct it’s only going to go about 10 or 15 down or reach the first bend and it will stop. You have to have some kind of negative pressure working with the positive pressure to pull the chemical through the duct work. I work with multiple mold remediation companies in NC. This method is a proven one with scientific evidence to back it up.

The National Air Duct Cleaners Association has had multiple study’s done on this and it works. CMR air duct cleaning are proud members of the association and follow their code of ethics.

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