This Lomanco vent turbine set has been designed for use on pitched roofs that have clay tiles or are metal profile roofs. A flexible universal base follows the shape and curve of the roof allowing the base to be installed from a 0° - 45° roof pitch. The set combines the most powerful single Lomanco turbine, a BIB14, with a universal base that can be installed on clay-tiled and metal profiled roofs. The turbine head requires no maintenance and has a lifetime warranty for increased assurance of the durability and life expectancy - please note, this lifetime warranty applies to residential use only. In instances where a Lomanco turbine has been installed for commercial use, the product is covered by a 15 year warranty. The universal base comes with a 2-year warranty. Lomanco 14” turbines move up to 37% more air than Lomanco 12” turbines so for areas that need higher capacity, low-cost ventilation, we recommend this BIB14 pitched roof set. This set includes: Lomanco BIB14 14” turbine head Universal base