The P-series roof fans can be led watertightly with a pass-through set through a roof. VILPE pass-through sets can be installed on any roofs with the most common pitches. The pass-through set is always selected according to the roofing material of the roof. All the roof fans in the P-series are compatible with all pass-through set types. Using P-series XL roof fans and XL exhaust ventilation pipes requires an XL pass-through. C-series roof fans are used, like the P-series products, in solutions where the duct is to be routed through the roof and a cone. The difference is that the C-series roof fans are installed on top of a sheet metal cone made by a sheet metal worker for the roof. The top of the cone must be Ø 170 mm, 230 mm, or 315 mm, depending on the size of the extractor or exhaust duct.