(a) (1) The local educational agency receiving a grant shall install filtration with a minimum efficiency reporting value (MERV) of 13 or better in the local educational agencyâs HVAC system where feasible. Qualified testing personnel shall review system capacity and airflow to determine the highest MERV filtration that can be installed without adversely impacting equipment, shall replace or upgrade filters where needed, and shall verify that those filters are installed correctly. If a system uses ultraviolet germicidal irradiation (UVGI) to disinfect the air, the UVGI lamp shall be checked for proper operation, replacing bulbs as needed and verifying that the ultraviolet light does not shine on filters. Recommendations for additional maintenance, replacement, or upgrades to allow for more protective filtration shall be recorded in the assessment report required pursuant to Section 1626. (2) For systems with economizers, qualified testing personnel shall test system economizer dampers pursuant to Section B of NRCA-MCH-05-AâAir Economizer Controls. Economizer dampers and controls that are not properly functioning shall be repaired by a skilled and trained workforce. Recommendations for additional maintenance, replacement, or upgrades shall be recorded in the assessment report. (b) (1) After completing the requirements of subdivision (a), a qualified testing personnel shall verify the ventilation rates in the facility classrooms, auditoriums, gymnasiums, nurses offices, restrooms, and other occupied areas to assess whether they meet the minimum ventilation rate requirements set forth in Table 120.1-A of Part 6 (commencing with Section 100.0) of Title 24 California Code of Regulations. Assessment shall include all of the following: (A) Calculation of the required minimum outside air ventilation rates for each occupied area based on the anticipated occupancy and the minimum required ventilation rate per occupant set forth in Table 120.1-A. Calculations shall be based on maximum anticipated classroom or other occupied area occupancy rates and determined by the performing technician. Natural Ventilation shall be designed in accordance with Section 402.2 of the California Mechanical Code (Part 4 (commencing with Section 1.1.0) of Title 24 of the California Code of Regulations) and shall include mechanical ventilation systems designed in accordance with Section 403.0, Section 404.0, or both of those sections, of the California Mechanical Code. (B) Measurement of outside air pursuant to Section B of NRCA-MCH-02-AâOutdoor Air Acceptance and verification of whether the system provides the minimum outside air ventilation rates calculated in subparagraph (A). (C) Survey readings of inlets and outlets to verify all ventilation is reaching the served zone and that there is adequate distribution. Verify if inlets and outlets are balanced within tolerance of the system design. Document read values and deficiencies. If the original system design values are not available, document available information and note unavailability of system design values in the assessment report. (D) Verification of building pressure relative to the outdoors to ensure positive pressure differential and to ensure the building is not over pressurized. (E) Verification of coil velocities and coil and unit discharge air temperatures required to maintain desired indoor conditions and to avoid moisture carry over from cooling coils. (F) Verification that separation between outdoor air intakes and exhaust discharge outlets meet requirements of the California Building Code. (G) Confirmation that the air handling unit is bringing in outdoor air and removing exhaust air as intended by the system design. (H) Measurement of all exhaust air volume for exhaust fans, including restrooms. Document any discrepancies from system design. (2) If the system does not meet the minimum ventilation rate requirements set forth in Table 120.1-A, a licensed professional or qualified adjus
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