HVAC/Duct Cleaning General Scope Of Work

Clean Air Services, Inc. proposes to perform the following HVAC/Duct cleaning procedures for the requested location. The project will be guided and/or supervised by a CMR (Certified Mold Remediators), a CIE (Certified Indoor Environmentalist) and National Air Duct Cleaners Association (NADCA) certified Air Systems Cleaning Specialists (ASCS), on staff with Clean Air Services, Inc. Our HVAC/Duct System decontamination procedures follow current industry guidelines.

A. Service Openings: Service openings, as required for proper cleaning, at various points of the HVAC system for physical and mechanical entry and inspection will be utilized.

  1. Existing service openings already installed in the HVAC system will be used where possible.
  2. Other openings will be created where needed and created so they can be sealed in accordance with industry codes and standards. Closures will be properly insulated and sealed to prevent air loss/gain or condensation on surfaces within the system.

B. Source Removal Cleaning Methods: The HVAC system will be cleaned using Source Removal mechanical cleaning methods designed to extract contaminants from within the HVAC system and safely remove contaminants from the facility. Source Removal methods will be selected that will render the HVAC system visibly clean and capable of passing cleaning verification methods and other specified tests, in accordance with all general requirements. No cleaning method, or combination of methods, will be used which could potentially damage components of the HVAC system or negatively alter the integrity of the system.

  1. All methods used will incorporate the use of vacuum collection devices that are operated continuously during cleaning. A vacuum device will be connected to the downstream end of the section being cleaned through a predetermined opening. The vacuum collection device will be of sufficient power to render all areas being cleaned under negative pressure, such that containment of debris and the protection of the indoor environment are assured.
  2. All registers, grills, and diffusers will be disassembled, contact cleaned and reassembled.
  3. All vacuum devices exhausting air inside the building will be equipped with HEPA filters (minimum efficiency), including hand-held vacuums.
  4. Mechanical agitation devices are used to dislodge debris adhered to interior HVAC system surfaces, such that debris may be safely conveyed to vacuum collection devices. Methods will include those, which will not potentially damage the integrity of the ductwork, nor damage porous materials such as liners inside the ductwork or system components.
  5. Air handler units Areas to be cleaned include blowers, fan housings, scrolls, blades, and assemblies. Coils and related components will also be cleaned in place.
  6. Chemical Layering – Sporicidin Disinfectant Solution is an EPA registered and FDA compliant broad-spectrum disinfectant used for cleaning, restoration, and applications in air duct cleaning. Applied according to the manufacturer’s instructions, Sporicidin will clean, deodorize, and disinfect target surfaces of the system.
  7. Encapsulate Microbial Resistant Coating—after cleaning procedures an encapsulate coating is applied to all fibrous material of the duct interior. Foster 40-20 Fungicidal protective coating is an EPA registered polyacrylate copolymer emulsion specifically formulated for long-term fungicidal activity, with no loss of activity on aging. It is formulated to effectively prevent the spread of molds and odor-causing bacteria on its surface. It provides a tough, elastic, decorative finish that allows for movement without splitting to create lodging places for bacteria.

Cleanliness Verification

A. General: Verification of HVAC System cleanliness will be determined after mechanical cleaning.

B. Visual Inspection: The HVAC system will be inspected visually to ensure that no visible contaminants are present. Cleanliness verification shall be performed immediately after mechanical cleaning and before the system is restored to normal operation.