CSLB #706889 holder National Air & Energy in Point Loma has served San Diego's commercial, industrial, and institutional markets from its Kurtz Street headquarters near Pechanga Arena since 1995. The company's in-house Building Automation and Controls division is the exclusive San Diego representative for the Siemens TALON product line, programming DDC sequences alongside the three-phase panel work that firms like Fuller Electric Corporation supply on shared commercial projects. A second CSLB classification under license #622229 for boiler, hot-water heating, and steam fitting covers hydronic plant rooms that most C-20-only contractors cannot touch. Scope ranges from preventative-maintenance contracts on multi-building campuses to ground-up mechanical design for new construction, fielding between 51 and 200 staff across service and engineering departments. Tenant-improvement HVAC buildouts in the Midway and Point Loma commercial corridors regularly bring the firm onto job sites managed by general contractors such as Kanna Construction & Remodeling. The most complex deliverable is a full central-plant retrofit on an institutional campus—replacing aging chillers, cooling towers, and boiler stacks while migrating the entire building-management system to Siemens TALON controls.