Ubbink's UB62 Modern in-line vent suits:
Redland, Mini Stonewold
UB62's offer a high performance whilst retaining the aesthetics of the roof design and is available in 4 colours. It is designed to provide ventilation of the roof space, either at high or low levels for roof pitches above 25° and may be used to supplement or replace other ventilation such as dry ridge, abutment or eaves systems.
The UB62 has a free vent area of 15,000mm².