Determining

Determining HVAC System Cleanliness  HVAC system cleanliness should be evaluated by visual inspection or an approved vacuum test method as outlined in appropriate NADCA standards. An HVAC interior surface is considered visibly clean when it is free of non-adhered debris. Vacuum test methods include visual surface comparison of “clean” areas before and after vacuuming as well as sampling a known surface area to determine the net weight of debris per area sampled to compare to an acceptable NADCA level.

The scope of work

(A) The scope of work for this project will include cleaning of all HVAC ductwork and accessories
at the Putnam Elementary School, Middle School and High School. The extent of ductwork to be
cleaned shall be determined by review of available construction documents and field verification.
(B) The Contractor shall be responsible for the removal of visible surface contaminants and
deposits from within the HVAC system in strict accordance with these specifications.
(C) The HVAC system includes any interior surface of the facility’s air distribution system for
conditioned spaces and/or occupied zones. This includes all Heating, Ventilating and Air
Conditioning systems from the points where the air enters the system to the points where the air is
discharged from the system. The return air grilles, return air ducts to the air handling unit (AHU),
interior surfaces of the AHU, mixing box, coil compartment, condensate drain pans, supply air
ducts, fans, fan housing, fan blades, turning vanes, filters, filter housings, reheat coils, and supply
diffusers are all considered part of the HVAC system. The HVAC system may also include other
components such as dedicated exhaust and ventilation components and make-up air systems.
The Kitchen Hood Exhaust systems are not included in the scope of work.

frameworks

The UCIAQ Committee demoralizes the utilization of concoction sanitizers or biocides to treat building supply and return ventilation work. Albeit numerous antimicrobial items are EPA endorsed for utilization on hard, non-permeable surfaces, these items were not particularly intended for utilization in HVAC frameworks and have not been assessed for potential inhabitant wellbeing presentation issues.

2.08 POST PROJECT REPORT

2.08 POST PROJECT REPORT
(A) At the conclusion of the project, the Contractor shall provide a report to the owner indicating
the following:
1. Success of the cleaning project, as verified through visual inspection and/or
gravimetric analysis.
2. Areas of the system found to be damaged and/or in need of repair.

If visible contaminants

If visible contaminants are evident through visual inspection, those portions of
the system where contaminants are visible shall be re-cleaned and subjected to
re-inspection for cleanliness.
3. NADCA vacuum test analysis should be performed by a qualified third party
experienced in testing of this nature.
(C) Verification of Coil Cleaning
1. Cleaning must restore the coil pressure drop to within 10 percent of the pressure
drop measured when the coil was first installed. If the original pressure drop is
not known, the coil will be considered clean only if the coil is free of foreign matter
and chemical

CLEANLINESS VERIFICATION

 CLEANLINESS VERIFICATION
(A) General
Verification of HVAC System cleanliness will be determined after mechanical cleaning and before
the application of any treatment or introduction of any treatment-related substance to the HVAC
system, including antimicrobial agents and coatings.
(B) Visual Inspection
The HVAC system shall be inspected visually to ensure that no visible contaminants are present.
1. If no contaminants are evident through visual inspection, the HVAC system shall
be considered clean; however, the owner reserves the right to further verify
system cleanliness through Surface Comparison Testing or the NADCA vacuum
test specified in the NADCA standards.

Antimicrobial Agents and Coatings

 Antimicrobial Agents and Coatings
1. Antimicrobial agents shall only be applied if active fungal growth is reasonably
suspected, or where unacceptable levels of fungal contamination have been
verified through testing.
2. Application of any antimicrobial agents used to control the growth of fungal or
bacteriological contaminants shall be performed after the removal of surface
deposits and debris.
3. When used, antimicrobial treatments and coatings shall be applied in strict
accordance with the manufacturer’s written recommendations and EPA
registration listing.
4. Antimicrobial coatings shall be applied according to the manufacturer’s written
instructions. Coatings shall be sprayed directly