The Helios Fans WDS 500, WDS 560, and WDS 630 are mounting bases developed for the installation of roof fans and ventilation hoods on corrugated roofs, compatible with RD roof fans positioned at inclines up to 25°. These bases are manufactured from glass fiber reinforced polyester, providing a lightweight yet unbreakable structure that is both weatherproof and resistant to corrosion. With low thermal transmittance and a shaft spacing of 177 mm (profile 5), they are designed for long-lasting performance. Each unit is supplied with fastening screws, profile rubbers, and sealing between the base and the base plate to ensure a secure and reliable fit.