From design to installation, our skilled craftsmen will have your job completed on time and to the highest quality. Comfort Systems USA Shoffner offers extensive manufacturing services, including sheet metal, spiral duct, processed pipe, and custom stainless steel fabrication. We also have prefabrication shops for sheet metal ductwork, plumbing, mechanical, and process piping so projects can continue no matter the weather or storage and fabrication areas on your jobsite.