Half bath exhaust fan required?

[Stevenfyeager]

Are exhaust fans required by NEC in half baths?

 

[electricguy61]

The NEC doesn't require bath fans anywhere, it only tells you how they must be wired.

 

[Sierrasparky]

I am not familiar with exact wording but that would be in the building code. If there is no existing ventilation such as a window then yes.
Why would you not want one in there?

 

[luckylerado]

The building code points to the Mechanical code.

Mechanical code Table 403.3 seems to say that for residential toilet rooms a min of 20CFM/50ft² of ventilation is required.

 

[Ragin Cajun]

The fan is a stink remover.

RC

 

[Dennis Alwon]

The fan is a stink remover.

RC

Actually it is the moisture not the stink that the code is concerned about.

 

[mgookin]

Actually it is the moisture not the stink that the code is concerned about.

Used to be but now even if you have that toilet compartment in a restroom than that toilet compartment needs its own fan in addition to the one in the restroom.

 

[John120/240]

Are exhaust fans required by NEC in half baths?

As stated bath fans are not a NEC concern. Around here if the bath room has a operable window no fan is required. But I have always installed one. Your choice as to which fan to install. IMO builder grade fans are just typically noise makers. The CFM that cheap fans move is minusicle.

I always suggest a quiet fan with higher CFM's .

 

[mgookin]

When I design my own stuff I put the fan at the outlet to get the noise away.

 

[kwired]

Half bath only needs half a fan

 

[J.P.]

Half bath only needs half a fan

That would be a half-a$$ed job.

 

[kwired]

That would be a half-a$$ed job.

Correct. So is only having a half bath

Which half do you suppose OP is getting?

 

[J.P.]

Hopefully a bath with a sink

 

[Ponchik]

R303.3.1
In California residential code, a bathroom containing a bathtub, shower or tub/shower combination must have a mechanical ventilation.

Check with your local AHJ.

 

[Strathead]

Half bath only needs half a fan

Are a half fan and a Yankees fan the same thing?

 

[kolega]

if no window than its required

 

[growler]

Actually it is the moisture not the stink that the code is concerned about.

Used to be but now even if you have that toilet compartment in a restroom than that toilet compartment needs its own fan in addition to the one in the restroom.

The reason for requireing an exhaust fan in the first place was that it would remove moisture and prevent mold.

It may be a good design to have an exhaust fan in a toilet compartment but I can't see any safety reasons.

I could (but I won't) name a couple of countries that prove that bad smells will not kill you.