Founded in 1977, Critchfield Mechanical is a mechanical contracting company that specializes in the design-build of heating, ventilation, air conditioning and plumbing systems. It maintains a more than 55,000-square-foot manufacturing and fabrication facility and serves high rises, laboratories, hospitals, hotels, convention centers, educational facilities, government buildings and retail outlets. The company provides value engineering, tenant improvement, custom fabrication, commissioning, firespray ductwork and process piping services. Its sheet metal shop fabricates custom ducts, plenums, variable air volume boxes and specialized fittings. Critchfield Mechanical employs a staff of engineers, air and balance technicians, and shop, sheet metal and piping crews. Its clients include Adobe, Ampex, Broadvision, Apple, Hotel Valencia, Oracle, Oakland Children s Hospital and Signature Biosciences.