4in vs 6in bathroom exhaust line

08-23-2012, 04:10 PM	#1
Trucon01 Member     Join Date: Jan 2012 Location: Northern Virginia Posts: 524	4in vs 6in bathroom exhaust line Hi All, I just got a new NuTone 130cfm bathroom fan and it has either a 6 or 4 in adapter. I know I know, 6 is better, but is this a huge differece? If so, I need to get all new vents and lines. Thanks. __________________ Basement Demo started Jan 2012: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Bathroom demo started Feb 2013: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

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08-23-2012, 06:18 PM	#2
techpappy Member   Join Date: Jul 2012 Location: Toronto ON Posts: 577	4in vs 6in bathroom exhaust line The 6 inch will increase flow by about double so, if it's a small bathroom go with the smaller diameter vent but, if large bathroom OR length of vent is more than 15 feet (each elbow is equivalent to 5 feet.) would be better with 6 inch.

08-23-2012, 06:49 PM	#3
Trucon01 Member     Join Date: Jan 2012 Location: Northern Virginia Posts: 524	4in vs 6in bathroom exhaust line Thanks man. I'm going to stick with the 4in because thats what the vent bundle came with. I did go out and buy a new insulated 4in line though. The line in the vent bundle is not insulated and this will be in the attic. Thanks for taking the time to reply. __________________ Basement Demo started Jan 2012: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Bathroom demo started Feb 2013: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

08-23-2012, 09:50 PM	#4
plummen retired elect/hvac/plumb     Join Date: Jan 2010 Location: south east of omaha Posts: 2,391	4in vs 6in bathroom exhaust line 4" will have more velocity which would help get it out quicker,i guess Ive never seen a fart fan with a 6" vent hooked to it. That thing would have to be huge,do you have a seat belt on the toilet? __________________ "facts" have no relevance to this discusion To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Posting from a concrete bunker under a non descript barn

08-24-2012, 08:27 AM	#5
Trucon01 Member     Join Date: Jan 2012 Location: Northern Virginia Posts: 524	4in vs 6in bathroom exhaust line Haa, nice. 6in is a thick line just for a fan. I was at HD last night looking at the insulated lines... I think 4in would be fine... Are you trying to channel your inner Mark Levin from your signature? __________________ Basement Demo started Jan 2012: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Bathroom demo started Feb 2013: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

08-24-2012, 10:35 AM	#6
plummen retired elect/hvac/plumb     Join Date: Jan 2010 Location: south east of omaha Posts: 2,391	4in vs 6in bathroom exhaust line That signature was from a previous post long ago . And yes Im a big Mark Levn fan __________________ "facts" have no relevance to this discusion To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Posting from a concrete bunker under a non descript barn