Yes, commercial exhaust fan installation in San Antonio, TX typically requires both mechanical and possibly electrical permits. Any new installation, major repairs, or system modifications that affect ventilation capacity or ductwork routing need permits. The permitting process ensures your system meets Texas building codes, local fire codes, and NFPA 96 standards for commercial kitchen ventilation. Inspectors verify proper hood sizing, adequate CFM for your equipment, correct ductwork installation, proper fire suppression integration, and appropriate makeup air systems. Skipping permits might seem like it saves time and money, but it creates serious problems. You risk failed inspections, fines, insurance issues if there’s ever a fire, and having to tear out and redo work that doesn’t meet code. We handle all permit applications and coordinate inspections as part of our installation service. We know exactly what San Antonio, TX inspectors look for and ensure everything passes the first time.