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  1. #1

    No Air Coming Out of Single Vent

    I have seen posts for similar issues, but they don't seem to hit my issue. We have a single vent in our 3rd floor bathroom with no air coming out. All the vents on this floor are either on the floor or on the lower half of the wall. However, the vent in this bathroom is in the ceiling. I went in the attic above the bathroom and determined that there is zero air coming up through the duct work that leads to this vent. I could see down about 10 ft and saw no obstruction. I even got some fishing tape and was able to fish it down 15-20 feet before it got stuck.....not sure if it is kinked or could not make it around a turn through the duct work. Either way.....just looking for your thughts. Also note, we have one furnace and the dampers are open on the two main square pipes coming off the unit. Thanks.

  2. #2
    Join Date
    Aug 2011
    Posts
    568

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    Quote Originally Posted by EvanB View Post
    I have seen posts for similar issues, but they don't seem to hit my issue. We have a single vent in our 3rd floor bathroom with no air coming out. All the vents on this floor are either on the floor or on the lower half of the wall. However, the vent in this bathroom is in the ceiling. I went in the attic above the bathroom and determined that there is zero air coming up through the duct work that leads to this vent. I could see down about 10 ft and saw no obstruction. I even got some fishing tape and was able to fish it down 15-20 feet before it got stuck.....not sure if it is kinked or could not make it around a turn through the duct work. Either way.....just looking for your thughts. Also note, we have one furnace and the dampers are open on the two main square pipes coming off the unit. Thanks.
    how long have you lived there? did it ever work? is the unit in the attic or basement? is the duct going to the bath roon flex duct or hard metal?

  3. #3
    Been in our home for 7 years....the home itself is 16 years old. Funny you ask, I'm not sure if we ever had air coming out in this room. It just hit us this summer. The unit is in the basement. The duct work is metal piping that comes up into the attic. There is about 3 ft of flex pipe that goes from the metal to the bathroom vent in the attic...make sense?

  4. #4
    Join Date
    Jul 2006
    Location
    Virginia
    Posts
    4,891
    some small bathrooms only require about 20 to 30 cfm there might a damper at the take off closed that is where the round pipe comes off the square duct

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