Policy topic
Title 24 Part 11 requires MERV 13 or better filtration for new or replacement HVAC and continuous ventilation.
California — State Roles and Responsibilities for PK-12 Public School Facilities — 2025 State Profile (2025), printed p. 54 · Cal. Code Regs. tit. 24, pt. 11
General education, science, and art classrooms must have HVAC systems capable of maintaining carbon dioxide concentrations no greater than 800 parts per million above outdoor ambient levels.
Arizona State Roles and Responsibilities for PK-12 Public School Facilities (2025), printed p. 32 · A.A.C. R7-6-215
Health and Safety Code § 39930 et seq. provides program authority related to indoor air.
California — State Roles and Responsibilities for PK-12 Public School Facilities — 2025 State Profile (2025), printed p. 54 · Cal. Health & Safety Code §§ 39930 et seq.
New school construction must incorporate indoor air quality practices based on the SMACNA Indoor Air Quality Guidelines for Occupied Buildings Under Construction to minimize contaminants during and after construction.
Arizona State Roles and Responsibilities for PK-12 Public School Facilities (2025), printed p. 32 · A.R.S. § 41-5832; SMACNA Indoor Air Quality Guidelines for Occupied Buildings Under Construction
Alabama does not maintain codified minimum indoor air quality standards specific to K-12 public school facilities.
Alabama State Profile (2025), printed p. 34
Alabama does not require routine indoor air testing or specific operational HVAC filtration or ventilation benchmarks for public K-12 schools.
Alabama State Profile (2025), printed p. 34
The School Facilities Division is required to provide school districts with updated information on maintaining indoor environmental quality at least once every two years, including technical guidance and best practices for maintaining healthy school environments.
Arizona State Roles and Responsibilities for PK-12 Public School Facilities (2025), printed p. 18 · A.R.S. § 41-5702(A)(8)
School HVAC systems must meet or exceed the version of ASHRAE Standard 62 applicable when the system was installed and must be maintained to provide continued indoor air quality performance.
Arizona State Roles and Responsibilities for PK-12 Public School Facilities (2025), printed p. 32 · A.R.S. § 41-5832; ASHRAE Standard 62
Carbon dioxide testing must be performed at a work surface near the center of the classroom under normal occupancy conditions, with at least 10 percent of classrooms in each building randomly sampled.
Arizona State Roles and Responsibilities for PK-12 Public School Facilities (2025), printed p. 32 · A.A.C. R7-6-215
Prototype research tool. Records are normalized from NCSI state profiles and have not been verified against current statutes or regulations. This is not legal advice — consult primary legal sources for current requirements.