Can two bathrooms share a vent?

Wyatt Okuneva asked a question: Can two bathrooms share a vent?
Asked By: Wyatt Okuneva
Date created: Wed, Apr 7, 2021 9:19 AM

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Those who are looking for an answer to the question «Can two bathrooms share a vent?» often ask the following questions:

❔ Can two bathrooms share a plumbing vent?

That isn't going to work. Wet venting can be for two bathroom on the same level. The waste stack from above does not vent the lower bathroom. You can't run a water closet past the other fixtures.

❔ Are vent fans required in bathrooms?

Bathroom Exhaust Fan Venting Code Basics. Surprisingly, bathroom fans are not required by some building codes. All municipalities have different requirements, but …

❔ Is there a way to vent two bathrooms?

  • Venting two bathroom exhaust fans through one roof duct won't work, sorry to say. But you can install one fan in your attic for both bathrooms, and make your bathroom quieter, too. By the DIY experts of The Family Handyman Magazine One fan, two vents

10 other answers

Can two bathrooms share a vent? Each bathroom has its own exhaust fan; each fan vents separately out the roof. But while you can't have two fans with one vent, you can make one fan and one vent serve two bathrooms. This setup requires an in-line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms (see photo).

Can two bathrooms share a vent? Each bathroom has its own exhaust fan; each fan vents separately out the roof. But while you can‘t have two fans with one vent, you can make one fan and one vent serve two bathrooms. This setup requires an in-line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms (see photo).

You’d often blow air from one bathroom into the other, and local building inspectors wouldn’t approve it. But while you can’t have two fans with one vent, you can make one fan and one vent serve two bathrooms. This setup requires an in-line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms (see photo).

You can use two bathroom fans feeding into one common exhaust line so long as all of the following are true: Each fan housing must have its own damper. The common exhaust vent line must be at least 1 size in diameter larger than the two individual exhaust lines feeding it.

Simply so, can you combine bathroom and kitchen exhaust? Simply put, NO. You cannot (by code) and should not (by practical reasoning) share exhaust venting between a kitchen exhaust and a bathroom exhaust fan.. Also, how should bathroom fans be vented? Bathroom vent fans must be vented to the out of doors.Venting this fan into the attic is simply asking for problems.

If the 2 bathrooms are not on the same floor level then the lower level bathroom must be back vented with the vent tied into the vent stack above the flood level of the highest fixture.

No, you may not connect two fan discharges to a single roof jack (the proper name for the roof outlet). Depending on the size of the roof jack you could use an in-line fan with the suction side split between the two bathrooms. Upvote.

both ducting to a y-adapter attached to a single roof vent opening. Problem ?: Maybe. Maybe. When bathroom fans are controlled by separate switches it is not allowed to have them share the same duct because one fan will push the humid air from one bathroom to the other bathroom. Will that be the case with both fans on at the same time?

Both bathrooms are on the same level of the house. There is no guarantee that both fans will be the same type, size, power, etc. Each fan runs independently of the other. Pipe runs will be different lengths from fan to exit point. Fans are on separate electrical circuits. exhaust-fan exhaust-vent. Share.

In a residence, a lavatory sink= 1.0 F.U., bathtub/shower= 2.0 F.U. and a toilet 1.6 gallon or less= 3.0 F.U, greater than 1.6 gallon= 4.0 F.U. So, 3-lav sinks, 3-1.6 toilets and 3-tubs/showers could be on one 2" vent. The UPC requires a 2" minimum vent for a toilet, other codes allow 1½". What size are the current vents?

Your Answer

We've handpicked 23 related questions for you, similar to «Can two bathrooms share a vent?» so you can surely find the answer!

Can 3 bathroom fixtures share same vent system?

Under the Uniform Plumbing Code, a 2" vent can handle 24 fixture units (F.U). In a residence, a lavatory sink= 1.0 F.U., bathtub/shower= 2.0 F.U. and a toilet 1.6 gallon or less= 3.0 F.U, greater than 1.6 gallon= 4.0 F.U. So, 3-lav sinks, 3-1.6 toilets and 3-tubs/showers could be on one 2" vent.

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Can bathroom vent fans share the same pipes?

It's Not OK to Share Bathroom Fan Duct with Kitchen Exhaust Fan Duct Question: bath fan and kitchen fan use the same exhaust pipe? 2018/06/01 John said: Can the bath fan and kitchen fan use the same exhaust pipe through the roof? Reply: No. Simply put, NO.

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Can you run two bathroom fans share vent?

You can use two bathroom fans feeding into one common exhaust line so long as all of the following are true: 1. Each fan housing must have its own damper. 2. The common exhaust vent line must be at least 1 size in diameter

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bathroom (n.) also bath-room, 1780, from bath + room (n.). Originally a room with apparatus for bathing (the only definition in "Century Dictionary," 1902); it came to be used 20c. in U.S. as a euphemism for a lavatory and often is noted as a word that confuses British travelers.

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Can 3 bathroom fixtures share same vent and drain?

Yes they both can share a vent. The distance between yours is 4’ if I read it correctly so you are well within the distance between the vent and fixtures so you should be golden unless your local code has some bizarre requirements.

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Can you run two bathroom fans share vent system?

You can use two bathroom fans feeding into one common exhaust line so long as all of the following are true: 1. Each fan housing must have its own damper. 2. The common exhaust vent line must be at least 1 size in diameter larger than the two indi...

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Can a bathroom fan and range hood share a vent?

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Can a bathroom fan and range hood share a vent diagram?

You cannot (by code) and should not (by practical reasoning) share exhaust venting between a kitchen exhaust and a bathroom exhaust fan. The design requirements and materials are different between bath exhaust vent systems and kitchen exhaust vent systems, and such sharing is prohibited by the model mechanical codes and shared ducting are likely to be prohibited by local building codes and code inspectors.

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Can a bathroom fan and range hood share a vent kit?

You cannot (by code) and should not (by practical reasoning) share exhaust venting between a kitchen exhaust and a bathroom exhaust fan. The design requirements and materials are different between bath exhaust vent systems and kitchen exhaust vent systems, and such sharing is prohibited by the model mechanical codes and shared ducting are likely to be prohibited by local building codes and ...

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Can a bathroom fan and range hood share a vent system?

You cannot (by code) and should not (by practical reasoning) share exhaust venting between a kitchen exhaust and a bathroom exhaust fan, with possible exception if your bath venting meets fire and other requirements for the kitchen exhaust and if approved by your local code inspector. .

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