Helping you efficiently breathe cleaner
indoor air
SCOPE OF HEATING, VENTILATING AND AIR
CONDITIONING SYSTEMS (HVAC) CLEANING PROCEDURE
The following air conditioning systems Cleaning
and Refurbishment Procedure description has been
developed for the purposes of cleaning,
sanitizing and remediation of the HVAC systems
and ductwork of the buildings described in the
Agreement, which incorporates this Scope of Work
document. The work performed by
(“Contractor”) in accordance with the (NADCA)
National Air Duct Cleaners Association
Assessment, Cleaning, & Restoration of HVAC
Systems ACR 2006 and The Institute of
Inspection, Cleaning and Restoration
Certification Standard S520 (IICRC S520).
This description outlines the procedures the
Contractor shall employ in the cleaning and
refurbishment of Air Handling Units and all
associated air side supply air and return air
ductwork.
The cleaning
procedures shall cover the following equipment:
All components of the airside surfaces of Air
Handling Units.
Airside surfaces of supply air ductwork, return
air ductwork, outside air ductwork.
Airside surfaces of all Variable Air Volume
devices and mixing boxes.
All supply air diffusers and return air grilles.
Contractor
Qualifications:
Shall include at a minimum a Class B Certified
Air Conditioning License for work in air
conditioning issued by the State of Florida
Department of Business and Professional
Regulation. Applying NADCA standards
to HVAC systems cleaning and refurbishment.
Quality
Control/Quality Assurance
of work
performance shall be guaranteed by the
compilation of a photographic report at the end
of the project. The photographs shall show the
before cleaning and after cleaning conditions
found in each air handling unit and associated
ductwork.
A.
In
order to comply with OSHA Standards, General
Industry 29 CFR 1910.147, “The Control of
Hazardous Energy (Lockout/Tagout)”, Contractor
shall incorporate all sections of the standard
into the work plan for each area we work in.
B.
Contractor shall provide all labor,
supervision, material, equipment and supplies
necessary to clean, sanitize and refurbish the
air conditioning systems and associated
components.
C.
Prior
to the cleaning and remediation, an evaluation
shall be performed on the building and air
conditioning system. The air conditioning
system shall be inspected for potential
contaminates in the air stream of the building.
D.
Contractor shall thoroughly inspect and clean
the inside of all Air Handling Units, all mixing
boxes, all supply air ductwork, return air
ductwork. It shall be Contractor’s
responsibility to ensure that the ductwork and
the inside of air handling units are not damaged
or have defects. If corrections are
required, it shall be reported to the Owner’s
representative.
E.
All
surface areas, work stations, desks, chairs,
counters and walking areas shall be covered with
plastic sheeting before any ceiling panels are
removed. All work sites shall be cleaned
up and debris removed at the end of work each
day by Contractor.
F.
Contractor shall furnish Certificate(s) of
Insurance which indicate that insurance coverage
has been obtained which meets the requirement as
outlined below:
G.
Worker’s Compensation Insurance for all
employees of the Contractor as required by
Florida Statute 440. Bodily Injury by
accident Insurance limits shall be $1,000,000
(Each Accident).
H.
Public
Liability Insurance on a Comprehensive basis in
an amount not less than $1,000,000 and General
Aggregate Limit of $2,000,000. In
addition, Products/Completed Operations
Aggregate Limit of $2,000,000 and Personal &
Advertising Injury Limit of $1,000,000.
Owner must be shown as an additional insured
with respect to this coverage.
I.
Automobile Liability Insurance and Uninsured
Motorist Single Limit covering all owned,
non-owned and hired vehicles used in connection
with the work, in an amount not less than
$1,000,000 combined single limit per occurrence
for bodily injury and property damage.
J.
The
insurance coverage required above shall include
those classifications, as listed in the standard
liability insurance manuals, which reflect the
operations of the Contractor.
Refurbishing
Air Handling Units:
The
cleaning procedures shall include all components
of the air handling unit, including but not
limited to the coil, condensation pan, purging
the condensate drain line, fan blades and
housing, insulation, turning vanes. Motors shall
be covered during the cleaning to prevent
contamination or water and chemical intrusion.
The cleaning and
decontamination procedures shall involve the
following procedures. After the air
handling units and the ductwork have been
properly accessed, the inside surfaces of these
areas shall be HEPA vacuumed to remove any
visible microbial growth and contaminant surface
debris. Then Coil Cleaner shall be sprayed on
both sides of the coils and then rinsed with a
pressure rinse (unit ventilators and smaller
fan/coil units shall be rinsed with less water
and pressure). The foaming coil cleaner
shall be applied repeatedly until the foam
rinses clean and white. The coils shall be
thoroughly rinsed and the condensate pan shall
be cleaned and flushed after the foaming coil
cleaner applications.
The fan blades and
inside of the fan housing shall also be cleaned
with diluted coil cleaner and then flushed.
Contractor mechanics shall make a 7/8” to 1-1/2”
hole at the bottom of the housing to provide
drainage for the dirt and metal cleaner and
water. This hole shall be covered with a
patch after the cleaning. The condensate
drain line shall be purged at this time.
The blower housing shall be painted with a rust
inhibiting primer and coated with an EPA
registered antimicrobial coating.
The drain pans shall
be resurfaced with PANCRETE drain pan protective
sealer.
The undamaged
fiberglass insulation lining the air handling
unit cabinet panels shall be coated with an
antimicrobial protective coating to seal and
preserve the insulation. The EPA
registered antimicrobial coating shall be
applied with an airless paint sprayer to provide
a uniform film on the inside of the air handling
unit and return air plenum.
After the coil
cleaning procedure and the fan blade cleaning,
the coils and fan blades shall be thoroughly and
evenly coated with a fine spray of coil
sanitizer to prevent fungi growth.
All exposed
fiberglass insulation found damaged or torn
shall be removed and replaced with IMCOA
microbial resistant insulation liner inside air
handling units. The fiberglass insulation
on the wet side of the coil shall be replaced
with the IMCOA. The IMCOA microbial
resistant insulation liner shall be one (1) inch
thick and meet ANSI/NFPA 90A and 90B flame
spread and smoke development standards.
The new insulation shall be pinned and glued to
the air handling unit cabinet panels per SMCNA
standards.
Variable Air
Volume Boxes/Mixing Boxes:
The air side surfaces
of all VAV boxes and mixing boxes where
applicable, shall be cleaned, sanitized and the
fiberglass insulation liner coated with an EPA
registered antimicrobial protective coating.
The disassembly of VAV boxes and Mixing Boxes
shall be to the extent necessary to prevent
damage to electrical components that cannot be
shielded during the cleaning process and to
provide adequate exposure to surfaces to be
cleaned.
Duct Work
Cleaning:
HEPA filtered
negative air equipment used shall be portable
and sized to easily enter all areas of the
building. The air duct cleaning collection
equipment shall be high-powered negative air
vacuum systems with the final filtration stage
HEPA filters. The ductwork shall be cleaned one
section at a time. A critical barrier
shall be constructed in the ductwork to isolate
a section of ductwork to be cleaned. An
ten (10) inch diameter vacuum hose shall be
attached to the ductwork from the negative air
vacuum unit to create a negative pressure in the
ductwork relative to the occupied areas of the
building. A mechanical, rotating brush shall be
moved through the ductwork to dislodge dirt and
debris from the top, sides and lower surfaces of
the ductwork. The loosened debris is then
simultaneously collected in the attached
negative air collection vacuum.
All galvanized air
supply, air return, and outside ductwork shall
be cleaned to remove all dust, dirt and debris.
All rigid fiberboard
and interior fiberglass lined air ductwork shall
be cleaned to remove all dust, dirt and debris.
The exposed fiberglass surfaces shall then be
coated with an EPA registered antimicrobial
protective coating applied with airless spray
paint equipment.
Where applicable,
fresh air intake ductwork and dampers where dirt
has accumulated shall be vacuumed and sanitized
with air duct sanitizer.
Where applicable, FIRE AND SMOKE AIR DUCT
DETECTOR SENSORS located in supply or return air
ductwork shall be covered to prevent fire alarm
activation and damage. This shall be
performed any time ductwork or air handling
units are being vacuumed, sanitized or sprayed
with antimicrobial coating. All covers
shall be removed at the end of the day to
prevent interference with the operation of the
fire alarm system.
Reheat coils shall be
vacuumed, cleaned with coil cleaner and rinsed
with clean water to return the coil to proper
air flow function.
Where applicable
electric duct heaters located in the ductwork at
the discharge of the air handling units shall be
HEPA vacuumed.
Any return air
grille, exhaust air grille or supply air
diffuser shall be removed and thoroughly
cleaned. After cleaning and drying, the
grille or diffuser shall be re-installed.
All electrical
equipment used by our technicians shall be
plugged into extension cords that have ground
fault interrupter boxes. Contractor shall
insure that all OSHA and EPA requirements that
are applicable to this type of project are fully
followed. Contractor shall be responsible
for proper disposal of any hazardous materials,
residue or rinse materials in accordance with
all applicable local, state and federal
regulations.
Contractor ensures
the building owners that all our employees have
been trained in the hazards associated with the
microbial and chemical exposures that may occur
on this project and that Contractor has fully
ascertained those potential hazards and provided
appropriate personal protection and work
procedures to minimize these exposures for our
employees.
In addition,
Contractor agrees to be responsible for
providing and requiring the wearing of NIOSH
approved N95 half mask respirator that meets
42CFR84 requirements. The filters are
equipped with a 95% efficient filter and shall
be worn at all times while working inside air
handling units and ductwork.
Material Safety Data
Sheets (MSDS) information and manufacture
information forms are provided as part of this
Scope of Work. Only products and materials
described in this Scope of Work shall be used in
the cleaning and decontamination procedures.
