I'm considering connecting the vents of two bathrooms to the same inline fan.
See my previous question on inline bathroom fans.
Does the fan and the exterior vent grille really need to be above the level of the bathrooms or can they be lower? I have a bath in the basement and one on the main level. I can't go with the fan above the first level for various reasons and it's hard to do it on the first level as well. Would it be a good idea for that inline fan and the exterior grill to be at the level of the basement (between the floors essentially)? This means that the upper bathroom vent pipe will have to go down to that level. Is it a bad idea?