I recently installed an bathroom exhaust vent. I seldome use it in the summer months because I have an glass block window,with an vent,in my shower that I just open to let out the steam/moister. In the winter months I seldom use the fan and just leave the door open so that the moister goes out of the bathroom and into the hallway. The reason being is that my house is very dry during these months and I just let the moister filter through the hallway and into the house to provide some relief to my family and I, (although temporary). I have yet to install the venting on the fan that goes into the attic because I'm not quite sure which type of venting is best for moister. (i.e. flexible stainless, or plastic etc etc.) I would like to know your thoughts on which type of venting to choose/use and when installing the vent how exactly to vent it through the attic ceiling. To better explain it I have a ridge vent along my roof and was thinking of having the vent just come right up to it and out of the attic. I would rather do this than cut a hole in my roof to vent the tubing from the fan.