1. (1) Definitions. As used in this section, unless the context otherwise requires:

   1. (a) ACCA means the Air Conditioning Contractors of America.
   2. (b) ASHRAE means the American Society of Heating, Refrigerating and Air-Conditioning Engineers.
   3. (c) Certified contractor means a contractor on the certified contractor list.
   4. (d) Certified contractor list means the certified contractor list created by the department of labor and employment pursuant to section 40-3.2-105.6 (3)(a).

   5. (e) Certified TAB technician means a technician certified to perform testing, adjusting, and balancing of HVAC systems by:

      1. (I) The Associated Air Balance Council;
      2. (II) The National Environmental Balancing Bureau;
      3. (III) The Testing, Adjusting and Balancing Bureau; or
      4. (IV) A successor organization of an organization named in subsection (1)(e)(I), (1)(e)(II), or (1)(e)(III) of this section.
   6. (f) CO2 means carbon dioxide.
   7. (g) Department means the department of education created in section 24-1-115.
   8. (h) HVAC means heating, ventilation, and air conditioning.
   9. (i) HVAC assessment report means an HVAC assessment report described in subsection (4) of this section.
   10. (j) International mechanical code means the 2021 international mechanical code published by the International Code Council or the most recent version adopted by the office of the state architect created in section 24-30-1302.5.
   11. (k) ISO/IEC 17024 personnel certification standard means the ISO/IEC 17024 personnel certification accreditation standard developed by the International Organization for Standardization and the International Electrotechnical Commission for the purpose of certifying personnel.

   12. (l) Local education provider means:

       1. (I) A local education provider, as defined in section 22-16-103 (4); and
       2. (II) The Colorado school for the deaf and the blind described in section 22-80-102.
   13. (m) Mechanical engineer means a professional engineer who is licensed pursuant to part 2 of article 120 of title 12 and has professional experience with HVAC systems.

   14. (n) MERV means minimum efficiency reporting value, as established by:

       1. (I) ANSI/ASHRAE standard 52.2-2017, Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size;
       2. (II) ANSI/ASHRAE standard 62.1-2022, Ventilation and Acceptable Indoor Air Quality;
       3. (III) ANSI/ASHRAE/ACCA standard 180-2018, Standard Practice for Inspection and Maintenance of Commercial Building HVAC Systems; and
       4. (IV) ASHRAE standard 241-2023, Control of Infectious Aerosols.
   15. (o) NOx has the meaning set forth in section 25-7-1502 (8).
   16. (p) Occupied areas means the classrooms, auditoriums, gymnasiums, cafeterias, nurses' offices, restrooms, and offices of a school.
   17. (q) Project labor agreement has the meaning set forth in 48 CFR 52.222-34.

   18. (r) Qualified adjusting personnel means:

       1. (I) A certified TAB technician; or
       2. (II) A worker who is under the direct supervision of a certified TAB technician.
   19. (s) Qualified personnel means qualified testing personnel, qualified adjusting personnel, or other workforce that is hired by and under the direct supervision of a certified contractor for the purpose of performing HVAC work.

   20. (t) Qualified testing personnel means:

       1. (I) A certified TAB technician; or
       2. (II) An individual certified to perform ventilation assessments of HVAC systems by the International Certification Board or through an equivalent certification program or body accredited under the ISO/IEC 17024 personnel certification standard.
   21. (u) School means an educational facility operated by a local education provider.
   22. (v) TAB means testing, adjusting, and balancing of an HVAC system.
2. (2) Applicability of section. On and after August 6, 2025, if a local education provider undertakes HVAC infrastructure improvements at a school using money from the Infrastructure Investment and Jobs Act cash fund created in section 24-75-232 (3), the local education provider shall comply with the procedures set forth in this section in implementing the HVAC infrastructure improvements.

3. (3) Ventilation verification assessment. Qualified personnel shall perform all of the following:

   1. (a) Filtration. MERV 13 or better filtration must be installed in a school's HVAC system where feasible. Qualified personnel shall:

      1. (I) Review system capacity and airflow to determine the highest MERV filtration that can be installed without adversely impacting equipment; and
      2. (II) Replace or upgrade filters where needed and verify that filters are installed correctly.

   2. (b) Ventilation and exhaust. After assessing the filtration as described in subsection (3)(a) of this section, qualified personnel shall assess the ventilation rates in the school's occupied areas to determine whether they meet the minimum ventilation rate requirements set forth in the international mechanical code. Assessment of the ventilation and exhaust must include all the following:

      1. (I) Calculation of the estimated minimum outside air ventilation rates for each occupied area based on the maximum anticipated occupancy and the minimum required ventilation rate per occupant. Calculations must be based on maximum anticipated classroom or other occupied area occupancy rates and determined by the international mechanical code.
      2. (II) Measurement of outside air and verification that the system provides at least the minimum outside air ventilation rates calculated pursuant to subsection (3)(b)(I) of this section;
      3. (III) Verification of coil velocities and unit discharge air temperatures required to maintain desired indoor conditions and to avoid moisture carryover from cooling coils;
      4. (IV) Verification that separation between outdoor air intakes and exhaust discharge outlets meets the requirements of the international mechanical code;
      5. (V) Confirmation that the air handling unit is bringing in outdoor air and removing exhaust air as intended by the system design; and
      6. (VI) Measurement of all exhaust air volume for exhaust fans, such as restroom exhaust fans, including documentation of any discrepancies from system design.
   3. (c) Economizers. For HVAC systems with economizers, qualified personnel shall test system economizer dampers and controls for proper operation. Economizer dampers and controls that are not properly functioning shall be repaired by a certified contractor or the certified contractor's qualified personnel. Qualified personnel shall record recommendations for additional maintenance, replacements, or upgrades in the HVAC assessment report.
   4. (d) Demand control ventilation. (I) If demand control ventilation systems are installed, qualified personnel shall verify their proper operation.
   5. (II) Demand control ventilation systems that are not properly functioning shall be repaired by a certified contractor or the certified contractor's qualified personnel.
   6. (III) If a demand control ventilation system is recommended to be disabled or is unable to provide recommended ventilation rates, the HVAC system must be configured to meet the minimum ventilation rate requirements without use of the demand control ventilation system and must be tested and adjusted to achieve at least the estimated minimum outside air ventilation rate, as described in subsection (3)(b)(I) of this section.

   7. (e) Air distribution and building pressurization. (I) Qualified personnel shall:

      1. (A) Perform survey readings of inlets and outlets to verify that all ventilation is reaching the served zones and that there is adequate air distribution;
      2. (B) Verify that inlets and outlets are balanced within tolerance of the system design; and
      3. (C) Document read values and deficiencies. If the original system design values are not available, qualified personnel shall document available information and note the unavailability of system design values in the HVAC assessment report.

      4. (II) Qualified personnel shall verify building and space pressure to ensure that:

         1. (A) The pressure differential is within tolerance of design, if known; and
         2. (B) The school building is not over pressurized.
   8. (f) General maintenance. Qualified personnel shall verify coil condition, condensate drainage, cooling coil air temperature differential (entering and leaving dry bulb), heat exchanger air temperature differential (entering and leaving dry bulb), and drive assembly condition.
   9. (g) Operational controls. Qualified personnel shall review control sequences to verify that systems will maintain intended ventilation, temperature, and humidity conditions during school operation.

4. (4) HVAC assessment report. Qualified personnel shall prepare an HVAC assessment report for review by a mechanical engineer. The HVAC assessment report must include all of the following information:

   1. (a) The name and address of the school and the certified contractor completing the work, including the name of the qualified personnel preparing the assessment report and the name of the mechanical engineer certifying the assessment report;
   2. (b) A description of assessment, maintenance, adjustment, and repair activities and outcomes;
   3. (c) Documentation of HVAC equipment model numbers, serial numbers, the general condition of units, and any additional information that could be used to assess replacement and repair options given the potential for increased energy efficiency benefits;

   4. (d) Verification that either:

      1. (I) MERV 13 filters have been installed; or
      2. (II) The maximum MERV-rated filter that the system is able to effectively handle has been installed, including an indication of the MERV rating of that filter;
   5. (e) Verification that all requirements described in this subsection (4) have been satisfied;
   6. (f) The verified ventilation rates for occupied areas and whether those rates meet the estimated requirements set forth in the international mechanical code;
   7. (g) The verified exhaust rates for occupied areas and whether those rates meet the requirements of the system's design; and
   8. (h) Documentation of system deficiencies and recommendations for additional maintenance, replacement, or upgrades to improve energy efficiency, safety, or performance or to reduce NOx emissions or greenhouse gas emissions, if any.

5. (5) Mechanical engineer review. A mechanical engineer shall:

   1. (a) Review the HVAC assessment report;
   2. (b) Verify or adjust the estimated minimum outside air ventilation rates;
   3. (c) Determine what, if any, additional adjustments, repairs, upgrades, or replacements are necessary to meet the minimum ventilation and filtration requirements of the international mechanical code;
   4. (d) Recommend a pathway for reducing NOx emissions and greenhouse gas emissions; and
   5. (e) Provide a cost estimate for all recommended work.
6. (6) Adjustments, repairs, upgrades, and replacements. All HVAC repairs, upgrades, and replacements shall be performed by a certified contractor or the certified contractor's qualified personnel. All HVAC adjustments shall be performed by qualified adjusting personnel.
7. (7) HVAC verification report. (a) A certified contractor or a member of the certified contractor's qualified personnel shall prepare an HVAC verification report within ten business days after completion of all work described in subsections (3) to (6) of this section.

8. (b) The HVAC verification report must include all of the following information:

   1. (I) The name and address of the school and the person preparing and certifying the report;
   2. (II) A description of assessment, maintenance, adjustment, repair, upgrade, and replacement activities and outcomes;
   3. (III) Verification that the certified contractor or the certified contractor's qualified personnel has complied with all requirements of this section;

   4. (IV) Verification that either:

      1. (A) MERV 13 filters have been installed; or
      2. (B) The maximum MERV-rated filter that the system is able to effectively handle has been installed, including an indication of the MERV rating of that filter;
   5. (V) The verified ventilation rates for occupied areas and whether those rates meet the requirements set forth in the international mechanical code. If ventilation rates do not meet applicable guidance, then the HVAC verification report must include an explanation of why the current system is unable to meet those rates.
   6. (VI) The verified exhaust rates for occupied areas and whether those rates meet the requirements set forth in the system's design;

   7. (VII) Documentation of repairs, upgrades, or replacements performed in response to:

      1. (A) The HVAC assessment report; and
      2. (B) The mechanical engineer's recommendations made pursuant to subsection (5) of this section;
   8. (VIII) Documentation of recommendations for additional maintenance, repairs, replacements, or upgrades to improve energy efficiency, safety, or performance or to reduce NOx emissions or greenhouse gas emissions;
   9. (IX) Documentation of the mechanical engineer's recommended pathway for reducing NOx emissions and greenhouse gas emissions;
   10. (X) Documentation of initial operating verifications, adjustments, and final operating verifications and documentation of any adjustments or repairs performed; and
   11. (XI) Verification that all work has been performed by a certified contractor or the certified contractor's qualified personnel, including the contractor's name, the names of the qualified personnel, the certification numbers of any qualified personnel, and verification that all construction work has been performed by a certified contractor or the certified contractor's qualified personnel.
9. (c) A local education provider shall maintain a copy of the HVAC verification report for at least five years and make it available to the public upon request.

10. (8) Certified contractors (a) If a local education provider undertakes HVAC infrastructure improvements as described in this section using money from the Infrastructure Investment and Jobs Act cash fund created in section 24-75-232 (3), the local education provider shall:

    1. (I) Obtain and make use of the certified contractor list to assist in contractor selection and ensure compliance with federal funding requirements; and
    2. (II) Employ only certified contractors or contractors that use prevailing wages and apprentices registered with the federal department of labor or the state apprenticeship agency created in section 8-15.7-102 for the performance of the HVAC infrastructure improvements.
    3. (b) The department shall publish the certified contractor list on its website and include or reference the list in all of the relevant marketing material for school infrastructure improvement programs to assist in contractor selection and ensure compliance with federal funding requirements.
    4. (c) The requirement described in subsection (8)(a) of this section does not apply to mechanical, plumbing, and electrical work that is performed pursuant to a project labor agreement that allows a contractor and all subcontractors to compete for contracts and subcontracts without regard to whether they are parties to a collective bargaining agreement.

    5. (d)

       1. (I) Upon evaluation of bids submitted for an HVAC infrastructure improvement contract, the local education provider may waive the requirements of this subsection (8) if the local education provider determines that there is substantial evidence that there were no responsive, eligible subcontractors available to fulfill the mechanical, electrical, or plumbing portions of the contract.
       2. (II) A local education provider that undertakes HVAC infrastructure improvements subject to the requirements of this subsection (8) shall make public all waivers and the specific rationale for granting a waiver. The local education provider shall post notice of a waiver and a justification for the waiver on its website.

Source: L. 2025: Entire section added, (HB 25-1245), ch. 400, p. 2262, § 2, effective August 6.

Cross references: For the legislative declaration in HB 25-1245, see section 1 of chapter 400, Session Laws of Colorado 2025.