We "cooltech systems" are the leading Manufacturer of a wide range of Air and Wind Ventilator, Polycarbonate Profile Sheet, GI Louver, Polycarbonate Ventilator Base Plate, Ridge Vent, Power Driven Roof Extractor, etc.We are very happy to know about stainless steel air ventilator are manufacturered or supplied by cooltech systems. Air ventilation was good nd size will be done by manufacturers. ... Continue