HVAC Sheet metal installers plan, lay out, fabricate, assemble, and install sheet metal duct work and related accessories and equipment. Work may involve any of the following: setting up and operating fabricating machines to cut, bend, and straighten sheet metal; shaping metal over anvils, blocks, or forms using hammer; operating soldering and welding equipment to join sheet metal parts; or inspecting, assembling, and smoothing seams and joints of burred surfaces.