GAC The helical electric fans included in the GAC series are suitable for suction of fumes, stale, dusty and damp air in foundries, cement factories, paper factories, joinery workshops. For the aeration of public premises, for drying up of paper, wool, pasta and tiles, to equip radiators, ventilated unit heaters, cooling towers, etc., and in general where large volumes of air at low pressure need to be conveyed. Minimum operating temperature: -20°C. Maximum operating temperature: +60°C.