Bay Area SMACNA represents over 120 sheet metal and air conditioning contractors who are signatory to SWMIA Local 104 and perform work in industrial, commercial, institutional and residential markets. Some benefits of membership include but aren't limited to: education programs, labor relations, local and regional meetings, national convention and events access, regulatory advocacy, safety training and social events. The largest of SMACNA's 97 chapters nationwide, Bay Area SMACNA members provide quality workmanship in the seventeen Northern California counties of Alameda, Contra Costa, Del Norte, Humboldt, Lake, Marin, Mendocino, Monterey, Napa, San Benito, San Francisco, San Mateo, Santa Clara, Santa Cruz, Solano, Sonoma, and Trinity.