We use this Roof Vent on our own conversions in the Kemora and Mondello model in our washroom where ventilation is needed It expells air or brings in fresh air via a 12v fan integrated in the roof vent . We have found it to be an excellent skylight with good fittings and a good study operation and a reliable well known make. We only use tried and tested products in our conversions and so that means we are confident to be able to sell to you. 
 
A 28x28cm rooflight, ideal for airing small spaces. Made with superior quality impact and UV-resistant materials. Supplied with mosquito screen. The external aerodynamic cover guarantees a watertight system