4" Duct "Y" For 2 - Bath Fans

[Ravenvalor]

Does anyone know of a 4" Duct "Y" that one can use in order to exhaust 2 - bath fans out of a single 4" wall vent?

Thank you,

 

[Ponchik]

https://www.homedepot.com/p/4-in-x-4-in-x-4-in-Wye-Y4X4X4/100396979

Will this work?

 

[Ravenvalor]

https://www.homedepot.com/p/4-in-x-4-in-x-4-in-Wye-Y4X4X4/100396979

Will this work?

The private home inspector turned down something similar to what yours looks like. He said that it was against code to run 2 - ducts out of a single wall vent. I plan to call the building inspector tomorrow for verification. I was hoping to find something like yours but with 2 - back draft dampers built into it. Thanks.

 

[Fulthrotl]

The private home inspector turned down something similar to what yours looks like. He said that it was against code to run 2 - ducts out of a single wall vent. I plan to call the building inspector tomorrow for verification. I was hoping to find something like yours but with 2 - back draft dampers built into it. Thanks.

panasonic inline fans come with what you are looking for...
a 4" wye, with flappers on each of the branches.

so, they can be found.

 

[Ravenvalor]

panasonic inline fans come with what you are looking for...
a 4" wye, with flappers on each of the branches.

so, they can be found.

Looks promising. I will let you know what the city inspector says. Thanks.

 

[kwired]

The private home inspector turned down something similar to what yours looks like. He said that it was against code to run 2 - ducts out of a single wall vent. I plan to call the building inspector tomorrow for verification. I was hoping to find something like yours but with 2 - back draft dampers built into it. Thanks.

The fans typically already have back draft dampers included so you shouldn't need one in your wye.

That said when both are running you may not get the airflow you would if each were separately vented or if they combined into a larger common duct.

 

[MAC702]

...combined into a larger common duct.

Will also make the fans quieter, which may be required if spec'd for their noise level.

 

[rcarroll]

The private home inspector turned down something similar to what yours looks like. He said that it was against code to run 2 - ducts out of a single wall vent. I plan to call the building inspector tomorrow for verification. I was hoping to find something like yours but with 2 - back draft dampers built into it. Thanks.

Not a mechanical code violation for 2 bath fans exhausts to "Y" together. Dryer & other exhaust, yes. And, certainly NOT an electrical problem.

 

[Ravenvalor]

Not a mechanical code violation for 2 bath fans exhausts to "Y" together. Dryer & other exhaust, yes. And, certainly NOT an electrical problem.

yes sir the local inspector agrees as long as its a Y And not a T

Thanks

 

[Edtk999]

Not a code violation, but at the end of the day AHJ overrides applicable code, so best bet is to consult if you're in doubt..

 

[El Jefe]

The private home inspector turned down something similar to what yours looks like. He said that it was against code to run 2 - ducts out of a single wall vent. I plan to call the building inspector tomorrow for verification. I was hoping to find something like yours but with 2 - back draft dampers built into it. Thanks.

Being an HVAC contractor in Ohio for over 10 years, I have seen and ran a multitude of projects tying (2) or (3) 4" or 6" pipes together using a 6" or 8" pipe whether it be through the roof or the wall.