Abstract: A vent for venting of exhaust from a building comprising at least one inlet for receiving the exhaust from the building into the vent; at least one valve for assisting in maintaining the unidirectional movement of exhaust from inside to outside the building; and an outlet for allowing the release of the exhaust from the vent; wherein the inlet meets the vent at a forward angle such that the exhaust flows towards the outlet and acts to reduce friction of the exhaust against the vent.