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Can I connect a 4" bathroom fan duct to my 4" dryer duct with a "Y"?

Discussion in 'The Lounge' started by Jessie James, Aug 26, 2012.

  1. Jessie James

    Jessie James 1/2 ton status

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    I am installing an in-wall bathroom fan and it happens to be sharing a wall with my utility room where my washer/electric dryer are located. It would be incredibly simple to buy a 4"x4"x4" "Y" adapter and hook the bathroom fan duct into the "Y" and then also connect the duct for the dryer into the "Y", and then use the existing duct out the side of my house, instead of running a second duct through the side of my house.

    I am thinking I would put a backdraft vent on each line before the "Y" so the fan wouldn't blow into the dryer and vice versa.

    Is there any downside to this? Fire hazard? Death and destruction?
     
  2. driney

    driney 1/2 ton status Premium Member

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    A 4" vent can't flow enough air to let the bath fan work with the dryer running. I would probably run a separate vent.
     
  3. Jessie James

    Jessie James 1/2 ton status

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    That is what I was afraid of. Thanks for the feedback!
     
  4. scotto0609

    scotto0609 1/2 ton status Premium Member

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    I cant recall the size of my bathroom duct but it is tied into my dryer vent and works just fine.
     
  5. sweetk30

    sweetk30 professional hooker Premium Member

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    prob against code also to share.
     
  6. Jessie James

    Jessie James 1/2 ton status

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    That was my other concern.

    I'm debating putting it in the ceiling now and out through the side of the house. A lot more work, but would look a lot nicer.
     
  7. k5warwagon

    k5warwagon 1/2 ton status

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    It's against North Carolina code I know. Also, depending on the length of run to the wall vent and length from y-fitting to the bathroom fan, you could have hot dryer exhaust coming back in your bathroom. Even with a directional flow Y. It's all depends on friction loss of each run.
     
  8. Massacre-77

    Massacre-77 1/2 ton status Premium Member

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    i would not do this some lint and hot air will be blown in the bathroom.
     
  9. Desert Rat

    Desert Rat Fetch the comfy chair

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    Or conversely the foul stench of a nice deuce could make its way into your dryer. You might end up using 5 Bounce sheets per load just to keep the beer and chili smell from your clothes....:eek1:
     

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