Bathroom exhaust

[Mark Olenick]

Hi DIYer here.

I've checked the code compliance book I have and could not find the answer so I'm hoping a professional can provide some guidance. Residential bathroom exhaust. 4 inch vent. Based on install conditions, without going into tremendous detail, I'd like to use schedule 40 PVC to vent to outside instead of smooth metal. Total run 18 feet plus to ell's The book I have does not mention ducting material. Is the sch 40 pvc allowable ?

Thanks

 

[BillTheEngineer]

It will work, but attaching the PVC to exhaust on the fan and the hood on the outside of the house will be a difficult. PVC and ducting are different sizes. The PVC is about 1/2 inch larger on the OD.

 

[Sponsor]

 

[Reach4]

Did your code have a section similar to this? http://publicecodes.cyberregs.com/icod/irc/2012/icod_irc_2012_15_sec002.htm

From what I read, PVC is not permitted and not a good idea due to heat and maybe static electricity generation contributing to clogging.
Oops... Mark is not trying to vent a dryer.

 

[CountryBumkin]

OP is working with bathroom vent, and your link is for dryer vent - so it doesn't apply.
But I agree that the PVC size/thickness will be an issue.

 

[Reach4]

so it doesn't apply.

Oops.

Maybe something like this on the output: http://www.homedepot.com/p/Active-V...pe-in-Black-Powder-Coat-AV-4-PVC-BL/205694962

So now he needs an adapter from his fan to the 4 inch PVC pipe. Or maybe he could use a radon fan that is already made for hooking to PVC, but then he would need an intake.

 

[Mark Olenick]

It will work, but attaching the PVC to exhaust on the fan and the hood on the outside of the house will be a difficult. PVC and ducting are different sizes. The PVC is about 1/2 inch larger on the OD.

Thanks Bill. Maybe a fernco at each end for final connect?