Bay Area SMACNA is made up of over 148 sheet metal and air conditioning contractors to serve your needs. They employ thousands of SMWIA Local 104 sheet metal workers and provide service to 17 Northern California counties, from the Oregon border to the Monterey Peninsula. Use the pull-down menu above to find a SMACNA Contractor in your area. Contractors are listed in our database by their home county, but they provide service in other counties as well.