fan in shower

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steelersman said:
Yeah I'm with you on that, but I have to say I've never seen an exhaust fan actually above the shower. They are always above the toilet even though that's not the true intent of them the duct man always puts them above th toilet. :)
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I hope I am reading this right. The intent of an exhaust fan is not for the steam produced by the shower, but the toilet bowl. That is why you must install a fan in a powder room with no window.. :D
 
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g@friendly said:
I hope I am reading this right. The intent of an exhaust fan is not for the steam produced by the shower, but the floater in the toilet bowl. That is why you must install a fan in a powder room with no window.. :D
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Nothing will remove the smell, exhust fans are for moisture only.
 
stickboy1375 said:
Nothing will remove the smell, exhust fans are for moisture only.
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Sorry you are wrong. If you go on the panasonic website it tells you how many cfms you would need to remove 1 drop of water. Also I believe that in the Boca code is where it says that it is for smell.
No moisture in the powder room.
A lot of the newer fans or coming out with humidity sensors now because, people have been for years installing them for moisture as "I have." these unit tend to post purge like a condesing furnace so that the steam clears the pipe and dosn't drip back into the room. Maybe an inspector can clear this one up for us.....
You are correct also nothing remove the smell quick enough. You just can't get the air exchange....
By the way I was told that they are going to be requiring straight pipe not flex for the bath fans... has anyone heard this?
 
g@friendly said:
Sorry you are wrong. If you go on the panasonic website it tells you how many cfms you would need to remove 1 drop of water. Also I believe that in the Boca code is where it says that it is for smell.
No moisture in the powder room.
A lot of the newer fans or coming out with humidity sensors now because, people have been for years installing them for moisture as "I have." these unit tend to post purge like a condesing furnace so that the steam clears the pipe and dosn't drip back into the room. Maybe an inspector can clear this one up for us.....
You are correct also nothing remove the smell quick enough. You just can't get the air exchange....
By the way I was told that they are going to be requiring straight pipe not flex for the bath fans... has anyone heard this?
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It just not make sense that a building code would care about the smell of a bath room, moisture I can see, just trying to use common sense on this one.
 
g@friendly said:
Sorry you are wrong. If you go on the panasonic website it tells you how many cfms you would need to remove 1 drop of water.
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So if it's for smell like you claim then why do they tell you how many cfm's you need to remove 1 drop of water? So you're saying that it's not to remove moisture although the website says it removes water?
 
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g@friendly said:
Sorry you are wrong. If you go on the panasonic website it tells you how many cfms you would need to remove 1 drop of water. Also I believe that in the Boca code is where it says that it is for smell.
No moisture in the powder room.
A lot of the newer fans or coming out with humidity sensors now because, people have been for years installing them for moisture as "I have." these unit tend to post purge like a condesing furnace so that the steam clears the pipe and dosn't drip back into the room. Maybe an inspector can clear this one up for us.....
You are correct also nothing remove the smell quick enough. You just can't get the air exchange....
By the way I was told that they are going to be requiring straight pipe not flex for the bath fans... has anyone heard this?
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here: http://www.hvi.org/assets/pdfs/HVI.BathroomFans_v3LOWRES.pdf
 
Code wise they are required for moisture removal, moisture damages the building and that is what the code would care about.

But no doubt they are also installed for oder removal. If you see one installed in a room that has a water closet and no shower or tub it was obviously installed for oder removal.
 
g@friendly said:
That is why you must install a fan in a powder room with no window..
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I have never seen a requirement to install a fan in a powder room with no window, can you point out what code and what section requires this?
 
g@friendly said:
Sorry you are wrong. If you go on the panasonic website it tells you how many cfms you would need to remove 1 drop of water.
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And why do you think they would tell you how many cfm's it takes to remove one drop of water? Sounds like their goal is to remove water. In case you didn't know water is moisture and vice versa, moisture is water. Odor or smell isn't water.


g@friendly said:
No moisture in the powder room.
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If you run the hot water for a while it can get steamy.


g@friendly said:
A lot of the newer fans or coming out with humidity sensors now because, people have been for years installing them for moisture as "I have."
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Then you and many others have been doing it correct then for all these years! :) If they are for smell then what good would a humidity sensor do in the fan? Answer: none.
 
iwire said:
I have never seen a requirement to install a fan in a powder room with no window, can you point out what code and what section requires this?
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Lavatories must have an operative window or ventilation of 50 cfm intermittent or 20 cfm continuously (per section R303.3 of the IRC) .
 
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