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Cladding of metal for construction and building; metal tubing; ducts and pipes of metal for central heating installations; elbows of metal for pipes; metal pipes; metal junctions for pipes; metal pipe clips, collars, connectors, couplings, joints, and fittings; metal storage tanks; pressure vessels made of metal alloys, namely, pressurized metal fluid storage tanks, pressurized metal gas storage tanks; roof guards made of metal

HVAC units

Building construction, remodeling, and repair; construction consultation; construction of clean rooms; construction planning; construction project management services; construction supervision; laying and construction of pipelines; pipeline construction and maintenance; general contractor services, namely, plumbing, heating and air conditioning, carpentry, drywall, painting, electrical, foundation, building, mechanical, paving, plastering, and framing contractor services; installation, repair, and maintenance of plumbing; HVAC contractor services; inspection services in the course of construction of buildings, clean rooms, plumbing, and ventilation systems; polishing of metal pipes and tubing

Custom manufacturing in the field of sheet metal shaping, cutting, and fabrication; custom manufacture of steel pipe and tubing; custom manufacture of framing, piping, and support structures for industrial equipment systems

Architectural and engineering services; consulting in the fields of engineering and architecture; custom design and engineering of clean rooms, HVAC systems, and plumbing systems; inspections of plumbing and ventilation systems; testing and inspection of clean rooms of others for certification purposes; inspecting and testing of welding of others for certification purposes; purge gas monitoring