The Helios FDS 180 Purlin Box is designed for secure placement of roof fans and ventilation hoods on flat roofs. Suitable for horizontal mounting, it supports RD roof fans with inclinations up to 25°. Constructed from corrosion-resistant glass-reinforced polyester (GRP), the box features abrasion-resistant insulation that provides both sound and heat protection. It offers a reliable snow-proof base height for durability in harsh weather conditions. The package includes fastening screws, profile rubber, and sealing materials to ensure a secure and weather-tight installation between the base and base plate. Ideal for durable and efficient roof fan installation on flat or slightly inclined roofs.