HVAC products, NAMELY, METAL DUCTS FOR HVAC INSTALLATIONS; METAL HVAC security cages; PREFABRICATED METAL HVAC SYSTEM platforms FOR INDUSTRIAL USE; METAL HVAC rails; METAL HVAC ROOF CURB isolation rails; METAL HVAC supports; METAL HVAC deck pans; PREFABRICATED METAL platforms; PREFABRICATED METAL catwalks; construction elements made of metal, namely, supports; metal guard rails; Wind dampeners, NAMELY, CONTROL DAMPER DEVICES USED IN AIR DUCTS TO REGULATE THE FLOW OF AIR; HVAC assemblies, NAMELY, INDUSTRIAL BLOWERS AND FANS AS COMPONENTS OF LARGE VENTILATION SYSTEMS; air filtration systems COMPRISED OF AIR HANDLER FILTERS AND HOUSINGS THEREFOR; air distribution systems COMPRISED OF HEAT REGISTERS, VENTILATION FAN GRILLES AND AIR DIFFUSERS; HVAC dampers; HVAC screening; HVAC spring dampers; spring dampers; spring dampers for HVAC; spring dampers for HVAC systems; seismic dampers; acoustic vibration dampers for HVAC; components parts for HVAC systems, namely, acoustic vibration dampers; metal spring dampers; metal vibration isolation for HVAC products; HVAC architectural screening; Acoustic panels and fillers IN THE NATURE OF SOUND ABSORBERS AND DIFFUSERS COMPOSED PRIMARILY OF NON-METAL MATERIALS THAT CONTROL SOUND; noise dampeners, NAMELY, SOUND ABSORBING FLOORING UNDERLAYMENT; baffles; RUBBER vibration isolation PARTS, NAMELY, PADS USED TO PREVENT MINOR VIBRATION TRANSMISSIONS IN HVAC EQUIPMENT; HVAC SUPPLY CHAIN LOGISTICS services, NAMELY, STORAGE, TRANSPORTATION, and DELIVERY; HVAC services, namely, design and engineering of HVAC systems, supports and components; Engineering services for seismic and wind loads; HVAC services, namely, engineering and design of HVAC accessory products; HVAC services, namely, engineering and design of HVAC accessory products including curbs, cages, isolation rails, etc.; logistical storage and distribution; HVAC unit modifications; HVAC design services