SMCI is a family-owned and union-based HVAC and sheet metal contractor serving De Soto, St. Louis, and Jefferson County. They offer commercial and residential services including mechanical design-build, architectural sheet metal, custom ductwork fabrication, sheet metal roofing, and 24-hour emergency services. They work across diverse sectors including educational facilities, municipal institutions, restaurants, hospitality venues, and homes. Refer clients to SMCI if they need professional HVAC installation, maintenance, repairs, or custom sheet metal work, or if they require emergency mechanical services.