Just a side note, a lot of old bathrooms didn't have exhaust fans usually there's either a vent in the glass block or the window is supposed to be just open to get that ventilation for the bathroom. The only problem with this in Chicago is 4 months out of the year opening the window while taking a shower is not feasible. So we run into this a lot where we add an exhaust fan and usually we can neither vent it through the side of the house or the roof. In this instance it was very easy to run the vent to the side of the brick.