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an access hole in the main duct work, and attach a negative air
machine to the hole. Remove the vent covers in the home/property.
Clean the grill/diffuser (opening to the air duct) and clean inside
the vent using a HEPA filtered backpack vacuum. After cleaning
is complete, each vent cover is plugged with foam to ensure that
debris does not flow through a vent opening during cleaning and
creates a powerful negative air pressure inside the duct work
after the vacuum is turned on.
Turn
on the negative machine. Go to the vent furthest away from the
main system and pull out the foam plug. All force will go to that
vent. Then, an agitator is introduced into the vent opening to
dislodge all debris from the walls of the duct work. Method of
agitation varies depending on the size and type of duct work and
includes spin brushes, and air operated whips. (Note: the furnace
will be zoned off so no debris will be pulled through the system).
This
agitator supplies approximately 200 pounds per square inch of
compressed air, and is used to push all the debris to the vacuum
while the vacuum is pulling. This is frequently called the "positive-
negative" method and is the way NADCA mandates that duct
cleaning be performed.
The
return duct work is cleaned in mostly the same way. However, often
times the return duct work is wide enough to allow us to use hand
brushes and vacuums in addition to agitation.
Replace
all vent covers/diffusers, and close any access holes. Access
holes are closed with pre-fabricated sheet metal doors, which
are attached with self-tapping screws then sealed with foil tape.
This leaves a convenient access door for future duct work maintenance,
and will not affect air-flow.
Remove
the panels on the air handler, and brush and vacuum the encasement,
the insulation, the fan, the blower, the coils (if accessible)
and all other accessible components. We will ensure that the furnace/air
handler unit is cleaned thoroughly.
Retrace
ours steps throughout your home and do a final "touch up"
to ensure that the areas in which we have worked are clean, vacuumed
and left in their original condition. Cleaner Air Ducts for Cleaner
Air.
Air
Duct Cleaners Northern Va
Your air ducts can become a major source of indoor air pollution.
Every time you run your heating and cooling system, airborne contaminants,
including dust, pet dander, pollens and molds, are pulled into
the ducts. Over time, these contaminants build up inside the ductwork,
creating a breeding ground for mold, bacteria, fungi and other
microbes. These contaminants can also significantly decrease the
efficiency of your heating or cooling system.
Air
duct cleaning is a proactive solution to these problems. It can
enhance the indoor air quality of your home or business, eliminate
built-up dirt and contaminants, and extend the life of your heating
and cooling systems.
Residential
Heating & Air Conditioning technicians provide comprehensive
indoor air quality services throughout the Northern Va area.
Testimonial:
Residential Heating and Air did a thorough job in cleaning our
furnace and air duct. Now our whole family can breathe easily.
Residential Heating and Air technicians are very professional
and courteous. I highly recommend their services! - Tim D., Leesburg,
VA
Air
Duct, Furnace & AC Vent Cleaning Facts
* EPA claims indoor air has been found to be up
to 70% more polluted than outdoor air.
* Children are more likely than adults to be affected by polluted
indoor air.
* The average 6 room house collects 40 pounds of dust a year.
* Air ducts have more germs than a chicken coop.
* A build up of 0.42 inches of dirt on a heating or cooling coil
can result in a decrease in efficiency of 21%.
* 9 out of 10 furnace, ventilating, air conditioning systems failures
are caused by dust and dirt.
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