I have it going up towards the ceiling? I have about 8 or so feet of flex tubing from the fan to the mushroom vent in the roof. the length of the hose doesnt matter, I should just make sure that there are no low lying spots in the hose? My husband is not home a lot to do things so I must do a lot by myself. Now a lot of water leaked from the fan into the bathroom, is it safe to turn that fan back on? Also, someone said I should keep running the fan for at least ten minutes after we are down taking a shower?