Metal vent cover for HVAC ducts; Metal roof vents for ventilation in residential and commercial buildings; Ducts of metal for ventilating installations; Metal air deflectors for HVAC vent covers; Metal coverings for ceilings; Ventilating ducts of metal; Metal vent covers for roof deck protrusions, drains and pitch pans; Ducts of metal for ventilating and air-conditioning installations; Window ventlights of metal; Ventilation windows of metal