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Ubbink's UB11 is an in-line unit with a multipurpose base which will provide inconspicuous ventilation in natural and manmade slate roofs.
Vepac vents are suitable for high or low level ventilation in roofs of 25° and over. Each vent has a slotted inhibitor to keep out large insects and vermin and provides a free vent area of 10,750mm².
For the UB11 vent to be converted into a terminal add a vepac connector and lower pipe