SPEC 6597 Montgomery County Department of Public Safety HVAC Duct Cleaning Services

1. Introduction The Montgomery County Public Safety Training Campus main buildings were built in 1986 and an addition built in 2000. The roof top HVAC units were replaced in 2023 and 2025. All building duct work is due to be cleaned and sanitized.

2. Vendor Qualifications & Experience

• All activities shall be performed in accordance with the NADCA ACR Standard, OSHA safety requirements, and other applicable industry guidelines and local regulations.

• Vendor must be a member in good standing with the NADCA (National Air Duct Cleaning Association).

• Include with the bid a summary of at least three (3) projects of similar scope and complexity completed within the past five (5) years that the proposed team members participated in to convey vendor’s expertise with air duct cleaning.

Provide customer references for each site including phone number and email address.

3. Purpose The objective of this work is to clean, restore, and maintain all designated HVAC ductwork and related components at the Montgomery County Public Safety Training Campus main building to a sanitary condition, free from visible dust, debris, and microbial contamination. This work is intended to improve indoor air quality, enhance system efficiency, and extend the operational life of HVAC equipment. All activities shall be performed in accordance with the NADCA ACR Standard (2013), OSHA safety requirements, and other applicable industry guidelines and local regulations.

4. Scope of Work The contractor shall perform the following tasks in a systematic and controlled manner:

A. Pre-Cleaning Inspection

• Conduct a comprehensive inspection of all HVAC ductwork, air handling units

(AHUs), supply and return ducts, diffusers, grilles, registers, and other accessible components.

• Document the condition of the system with photographs and written notes, identifying areas of heavy contamination, damage, or restricted airflow.

B. Containment and Protection

• Establish containment barriers and use protective coverings to prevent cross-contamination of occupied spaces.

• Protect furnishings, flooring, and sensitive equipment in the work area.

• Ensure that negative air pressure is maintained in the cleaning zone to control the spread of dust and debris.

C. Cleaning Process

• Deploy negative air machines equipped with HEPA filtration to capture airborne particles during cleaning.

• Clean the entire duct system utilizing HEPA filtered vacuums, 4,000 & 4,500 CFM HEPA rate duct machines, pneumatic tools and rotary equipment.

• Use mechanical agitation tools such as rotary brushes, air whips, or compressed air nozzles to dislodge debris from duct surfaces.

• Vacuum all loosened contaminants from the system using HEPA-filtered equipment.

• Clean all visible and accessible dust and debris in supply and return ducts in directional flow.

• Clean and sanitize coils, register, diffusers, fire detection equipment, drain pans, fan assemblies, and other accessible HVAC components as specified in the project requirements.

• Replace or clean air filters in accordance with manufacturer recommendations or client instructions.

D. System Restoration

• Reinstall and secure all access panels, patch plates, registers, diffusers, duct openings, and insulation materials to their original condition.

• Replace air filters (customer to supply)

• Ensure that all system components are properly reconnected, operational and restored to normal operation.

5. Compliance & Quality Assurance

• All work shall be performed in compliance with NADCA standards, OSHA safety requirements, and applicable local building codes.

• The contractor shall maintain a safe work environment, ensuring that all personnel are trained and equipped with appropriate personal protective equipment (PPE).

• Provide photographic documentation of all areas before, during, and after cleaning to verify the quality of work.

• Conduct a joint final inspection with the client to confirm that cleanliness, system integrity, and operational performance meet agreed-upon standards.

6. Deliverables

• A detailed written report summarizing:

• The scope of work completed.

• Pre- and post-cleaning inspection results.

• Any deficiencies or damage observed during the process.

• Recommendations for repairs, maintenance, or system improvements.

• Photographic evidence of pre-, during-, and post-cleaning conditions.

• A signed inspection checklist confirming that all work has been completed to specification.

7. Additional Considerations

• Work shall be scheduled to minimize disruption to building operations and occupants, generally Monday through Friday between the hours of 8:00 AM and 4:30 PM, except county holidays.

• All waste materials, debris, and used filters shall be collected, contained, and disposed of in accordance with environmental regulations.

• Any unforeseen issues discovered during cleaning, such as mold growth, damaged ductwork, or compromised insulation, shall be reported immediately to the client for further action.

• Total Bid Price is to include a $5,000.00 contingency allowance for unforeseen conditions

1) $5,000.00 allowance for unforeseen conditions is included in the Contract Sum and is controlled by the County. The County shall determine at its sole discretion which, if any, costs it will authorize in writing to be paid from or deducted by this Allowance. The costs (if any) for design, products, delivery, installation, labor, insurance, payroll, taxes, bonding, differing site conditions and equipment rental will be included in any authorization of expenditure of funds from this Allowance.

Funds will be drawn from this Allowance only with the County’s approval. At Contract Closeout, funds remaining in Allowance will be credited to the County.

8. Submissions and Communications

• Bid Submission Responses to this solicitation must be submitted through the County’s procurement submission portal, Bonfire, at https://montcopa.bonfirehub.com/portal.

• Questions All questions must be submitted through the Bonfire vendor discussion portal, and answers will be posted there for public review.