TU chimney extraction fan range is designed to perform reliably under the strenuous conditions associated with the ventilation of closed livestock structures. During cold and moderately warm periods a low rate of air extraction from livestock structures is required. Special emphasis needs to be placed on the variability of the ventilation rate and to avoid the creation of unnecessary drafts over the animals. TU chimney fan series is designed to meet these demands. The position of the fans on the roof can be preferred to optimise the bio-security in between building sections. The TU chimney fan series comply with the Eco fan Directive, and is state of the art with aerodynamic designed fan house and super-efficient EC motors called Munters Drive. To obtain a smooth and durable surface finish, high quality polyethylene is used in the construction of the main body of the fan.