In order to provide clean air throughout the building, we need to make sure all dirt, dust, debris and other contaminates have been removed from the system. Pure MD Air will clean the HVAC duct system utilizing our mitigation cleaning process. Using our high volume cyclonic duct cleaning truck and top of the line equipment , the entire HVAC system is put under negative pressure. High pressure agitation cleaning tools are used to loosen and remove built up contaminates. Pure MD Air cleans all components of the HVAC system including air handling unit, supply and return duct work , interior components, registers and replace the air filters. Our brush cleaning technology is used to ensure complete removal of debris from the interior of the duct work.
Once all Debris is removed from the interior of the HVAC system, we apply an EPA registered hospital disinfect to the inside of the duct work to help kill any mold, virus, bacteria etc.
To restore a property to pre-disaster condition, adjusters and project managers need to be familiar with all of a buildings components that can be impacted by fire, flood and other events. This includes understanding HVAC systems and the reasons for cleaning them as outlined in the NADCA standard and the IICRC standards.
Clean up after fire or flood damage can leave your HVAC system vulnerable to particulate contamination if either the intake or return ducts openings are located where there are increased levels of particulate or any airborne contaminants, thus requiring disaster cleanup of the system.
1 Reduced/no ability to cool or heat
2 Restricted or no air flow
3 Unbalanced air flow
If a fire has taken place, it is likely that particulates such as soot or ash will build up on the heating or cooling coils causing a reduction in function. In the case of flooding, often times debris or mud will cause an accumulation and consequent clogging of the coils and blocking the air stream, again reducing the systems efficiency.
During a disaster, any number of foreign items can be sucked into the HVAC system, blocking the heating and cooling coils or even ending up in the duct work impeding the airflow dramatically. In order to restore the systems functionality and efficiency a thorough HVAC cleaning is absolutely necessary.
This is a common occurrence if particularly wind borne items get sucked into the return ducts, which consequently loads up the HVAC filters and can also migrate into the supply duct work. This will continue to occur until the system has been thoroughly cleaned.
In the case of a fire, if at all possible, we highly recommend turning the HVAC system OFF, reducing the amount of ash, cinders etc. entering the system. You can expect some level of debris to be emitted from registers once the system is turned back on after a fire, which will continue unless the system is cleaned.
If HVAC filters are not regularly maintained, over a period of time, materials throughout the duct system will likely start to peel off and eject from the ducts.
There are generally 2 reasons for noxious odors emitting from the HVAC system. The first being due to molecules formed by things such as smoke residue, debris and even dead animals. Effective removal of molecular level odors is done by altering the chemical residue using ozone, chemical deodorizers or a natural odor neutralizer so they no longer produce a detectable odor. The second involves things such as ash or sewage which are larger particulate items that will continue to produce an odor until they are physically removed from the HVAC system.
Commercial air handlers can be commonly located on roof tops making inviting homes to roosting pigeons and birds nesting in or around the HVAC system and a times making way into the duct work. In residential systems, rats can be problematic as they tend to chew flex duct, hoard duct insulation and will nest in parts of the air handler.
A fire hazard exists when any combustible materials get close to the heating element of the unit. Often items such as leaves, flammable chemicals, kitchen grease, paper etc. can be found within the duct work.
One of the most common calls we receive is due to particles blowing out of the system. It is likely that the fiberglass liner within the duct work or within the air handler itself is damaged and therefore flaking off and emitting through the air stream.
The Environmental Protection Agency (EPA) is very clear about using an HVAC system that may have a mold issue.