| Procedures &
Methods for Commercial & Industrial Air Duct
Cleaning |
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For Industrial and
Commercial Applications
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I. Standards and Regulations
A. Standards of cleanliness shall be NADCA
Standard of Mechanical Cleaning of
Non-Porous Air Conveyance System Components
ACR 2002.
B. All service openings shall comply with NADCA
Standard 05 – 1997.
C. Standards and regulations established by
SMACNA, EPE and NAIMA shall be strictly
adhered to.
II. Scope
of Work
A. All aspects relating to the Air Conveyance
System will be addressed.
1. Any interior surface of the building's air
distribution system for conditioned spaces
and /or occupied zones. This includes the
entire air moving system from the points
that the air enters the system to the
points where the air is discharged from the
system.
2. Components of the system to be cleaned.
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Return vents and corresponding duct work |
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Blower compartment and blower |
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All supply registers will be cleaned |
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All supply ducts |
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All coils, drain pans and condensate pans
shall be inspected and pneumatically |
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cleaned |
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Filter housing |
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Filters changed if provided |
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All turning vanes |
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All dampers |
B.
Access holes
1. All access holes required during the
cleaning shall be placed in discreet areas. We
will utilize service openings when
possible.
2. Service openings shall be closed in an
airtight manner.
3. Metals used in the fabrication and
installation of service openings shall be resistant
to atmospheric corrosion and shall not be
used in combinations that will cause galvanic
action which might deteriorate any part
of the system formed from such material.
4. Metal panels used for closing service
openings shall be mechanically fastened.
5. Metal panels used for closing service
openings shall be sealed by gasketing, masticking,
or taping.
6. All materials used for closing service
openings shall be classified as having a flame
spread rating of not over 25 without
evidence of continued progressive combustion
and a smoke-developed rating of not over
50, as determined by IUL 181.
C. Cleaning Method
1. Negative air pressure duct cleaning vacuum
for extraction, filtration and collection.
2. Direct contact cleaning.
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Mongoose/Spin Air Whip Dislodging Equipment |
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Scan Tech Tornado Compressed Air Dislodger |
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Scan Tech Rotating Brush Nozzles |
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3.
All areas where equipment is located and in
operation will be covered with tarping
material for containment purposes.
4. The HVAC system shall be under constant
negative pressure, as a containment
strategy, at all times cleaning is
transpiring. These measures insure that debris will
not be released into occupied spaces.
5. When Power Vacuum is utilized, all debris
will exit directly to the exterior containment
modular, or interior HEPA-filter
containment modular.
6. All reasonable measures will be taken to
control offensive odors and/or mist vapors
during the cleaning process.
7. Sanitizing: All non-porous surfaces of the
air conveyance system are sanitized to
reduce the presence of residual mold and
bacteria.
8. Once the entire air conveyance system is
prepared, the power vacuums will be in
force. While the system is under optimum
vacuum's, the duct whip shall be drawn
throughout the entire network, breaking
up all airborne particle matter as well as an
assortment of other contaminants, they
will be vacuumed out without a trace of cross
contamination in the occupied space.
9. Resin Encapsulants can be applied to
mildly contaminated, or mildly deteriorated
sections of interior insulation. |
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