NADCA standard cleaning

The only acceptable air duct cleaning method is the one specified in NADCA (National Air Duct Cleaning Association) Standards.  Any cleaning that does not comply with those standards will most likely leave the cleaned system with more issues then the original condition.

This means that the AC vent servicing company might agitate the contamination in the system, but might not successfully collect the contamination into a HEPA filtered collection unit. Agitated but not collected contamination will be pushed to the living space when the system is re-energized.


 NADCA standards specify proper methods as well as the proper equipment to be used. NADCA requires surface agitation. This can be achieved through contact vacuuming with a HEPA filtered industrial vacuums on accessible parts of the HVAC system or with agitation devices such as mechanical brushes under negative air pressure and a collection system.  Therefore, consumers should be on the watch for any company claiming to spray some magical chemical in to the system without using agitation and collection devices.

Proper HVAC Cleaning Process

There are two key components to HVAC cleaning: breaking
contaminants loose, and collection of contaminants.

Breaking Contaminants Loose

Properly cleaning HVAC systems requires removing the sources
of contamination. Source removal begins with use of one or
more agitation devices designed to loosen contaminants from
the surfaces within the heating and air-conditioning system.
Examples of agitation devices include brushes, air whips, and
compressed air nozzles or “skipper balls.” Agitation can also be
achieved through hand-brushing or contact vacuuming.


DUCTZ uses a rotating brush for agitation
to loosen contaminants


Collection of Contaminants

During cleaning, the entire HVAC system is placed under
continuous negative pressure (vacuum) to prevent the spread
of contaminants. Continuous negative pressure allows very fine
particles to be removed from the system as they become airborne,
ensuring that these particles are not released into the living space
when the system is turned on after cleaning.

This negative pressure also serves to extract the loosened
contaminants, which are collected and removed from your home.


Video of Duct Cleaning

See the full duct cleaning process video here



Estimated time for duct cleaning

Typical air duct cleaning in a two-bedroom home should take 3 - 4 hours with 2 technicians. Any company claiming they have the technology to do it in less time, is probably cutting corners and not doing a proper job.
Don't be fooled by low price scams. Get a FREE Inspection from DUCTZ and know exactly how much you will be paying.  Call us today at 1-954-366-6131