Join Early Retirement Today
Reply
 
Thread Tools Search this Thread Display Modes
Old 07-20-2015, 02:58 PM   #21
Thinks s/he gets paid by the post
Big_Hitter's Avatar
 
Join Date: May 2013
Location: In the fairway
Posts: 4,094
Quote:
Originally Posted by samclem View Post
It's of interest, but not the whole story. If there's no flapper/backdraft preventer, more moisture probably goes into the attic through normal stack effect of the inside air the other 23 hours per day than would go there from one wet bathroom. And then there's the heat loss issue, also dependant on a flapper valve.

With a two story, the heat loss through a 4" fan/vent will be larger than in a single story, due to the greater stack effect.
I think our hall bath (fart) fan vents to the attic. We never use the fan so I haven't worried about it. Good point with the heat loss though.
__________________

__________________
Swing hard, look up
Big_Hitter is offline   Reply With Quote
Join the #1 Early Retirement and Financial Independence Forum Today - It's Totally Free!

Are you planning to be financially independent as early as possible so you can live life on your own terms? Discuss successful investing strategies, asset allocation models, tax strategies and other related topics in our online forum community. Our members range from young folks just starting their journey to financial independence, military retirees and even multimillionaires. No matter where you fit in you'll find that Early-Retirement.org is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with our members, see fewer ads, upload photographs, create a retirement blog, send private messages and so much, much more!

Old 07-20-2015, 03:15 PM   #22
Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
pb4uski's Avatar
 
Join Date: Nov 2010
Location: Vermont & Sarasota, FL
Posts: 16,411
We had a similar situation in our old house (in a cold climate) and added a vent through the roof that the shower vent attached to IIRC. I just wasn't comfortable venting moisture into the attic even though we had done it for several years with no noticeable ill effects.
__________________

__________________
If something cannot endure laughter.... it cannot endure.
Patience is the art of concealing your impatience.
Slow and steady wins the race.
pb4uski is offline   Reply With Quote
Old 07-20-2015, 04:06 PM   #23
Moderator
Ronstar's Avatar
 
Join Date: Aug 2007
Location: A little ways southwest of Chicago
Posts: 9,342
I vented our half bath to the attic, but in your case, I would cut a hole in the soffit, install a soffit vent, and connect it to the end of your existing vent with flex vent duct.


Sent from my iPhone (:.using Early Retirement .//82339)
__________________
Ronstar is online now   Reply With Quote
Old 07-20-2015, 04:22 PM   #24
Recycles dryer sheets
 
Join Date: Aug 2014
Location: Western Canada
Posts: 393
Quote:
Originally Posted by Ronstar View Post
I vented our half bath to the attic, but in your case, I would cut a hole in the soffit, install a soffit vent, and connect it to the end of your existing vent with flex vent duct.


Sent from my iPhone (:.using Early Retirement .//82339)
Or, if it's an option, vent it out an end wall in the attic. Just vent it somehow if you are in a cold climate.
__________________
I'm not crazy. Honest, the judge had me tested.
Rick_Head is offline   Reply With Quote
Old 07-20-2015, 04:35 PM   #25
Thinks s/he gets paid by the post
 
Join Date: Dec 2014
Location: Florence, AL/Helen, GA
Posts: 2,091
Codes in many places say vent them through the roof. Reality is that bathroom venting seldom is even used more than a few minutes. The attic never is affected.


More problems come from leaking roof vents than just blowing air into the attic.
__________________
Bamaman is offline   Reply With Quote
Old 07-20-2015, 06:01 PM   #26
Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
 
Join Date: May 2005
Posts: 13,263
Our master bath does not have any vent...

The other two baths and the half bath have the fans... but one of them has a separate toilet room where it is located... not the bath part.... I think all are vented into the attic...


But, we never turn them on so it really doesn't matter....
__________________
Texas Proud is offline   Reply With Quote
Old 07-20-2015, 07:10 PM   #27
Recycles dryer sheets
 
Join Date: Aug 2014
Location: Western Canada
Posts: 393
Quote:
Originally Posted by Bamaman View Post
Codes in many places say vent them through the roof. Reality is that bathroom venting seldom is even used more than a few minutes. The attic never is affected.


More problems come from leaking roof vents than just blowing air into the attic.
Here in the frozen north, where the thermometer is below freezing from Nov. - Apr, if you vent your bathroom (with shower) directly into the attic you will have up to a couple of hundred pounds of ice in your attic by spring. Then it melts. Then... the attic is affected.

It depends on where you live.
__________________
I'm not crazy. Honest, the judge had me tested.
Rick_Head is offline   Reply With Quote
Old 07-20-2015, 07:49 PM   #28
Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
pb4uski's Avatar
 
Join Date: Nov 2010
Location: Vermont & Sarasota, FL
Posts: 16,411
How to Properly Vent a Bathroom Exhaust Fan in an Attic | Today's Homeowner

How to Install a Bathroom Vent Fan | This Old House

Quote:
Note that the fan must always exhaust to the outdoors; never allow the duct to simply blow into an attic, crawlspace or other enclosed area
__________________
If something cannot endure laughter.... it cannot endure.
Patience is the art of concealing your impatience.
Slow and steady wins the race.
pb4uski is offline   Reply With Quote
Old 07-21-2015, 01:22 AM   #29
Full time employment: Posting here.
 
Join Date: Mar 2008
Posts: 704
Our house was originally vented to the soffits. What I noticed when we painted the exterior was that the old paint was peeling and cracking where the vents were. We vented through the roof when we re-roofed the house. If you have extra shingles available, a handyman could install a roof vent. I'd make certain he's done it before or at least has replaced damaged shingles before. If you have a steep sloped roof, I'd look for a roofing contractor, although, you may have trouble getting one to take the job.


Sent from my iPad using Early Retirement Forum
__________________
akck is offline   Reply With Quote
Old 07-22-2015, 08:24 AM   #30
Thinks s/he gets paid by the post
John Galt III's Avatar
 
Join Date: Oct 2008
Posts: 1,285
One more option! There should already be a vertical tube going through the attic and through the roof. It's the sewer vent pipe. My shower fan exhaust is connected to this vertical pipe. A pvc pipe goes horizontally from the shower fan to the vertical vent pipe. And no, there is no backdraft of odor from the sewer vent. No need to cut another hole in the roof. If I were doing it I would just route an elephant trunk from the fan to an eave and hope the exhaust went outside at least half the time.
__________________
John Galt III is offline   Reply With Quote
Old 07-22-2015, 08:28 AM   #31
Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
pb4uski's Avatar
 
Join Date: Nov 2010
Location: Vermont & Sarasota, FL
Posts: 16,411
I don't think utilizing the sewer vent is a good idea. Certainly not code and IMO worse than just venting into the attic.
__________________
If something cannot endure laughter.... it cannot endure.
Patience is the art of concealing your impatience.
Slow and steady wins the race.
pb4uski is offline   Reply With Quote
Old 07-22-2015, 10:11 AM   #32
Full time employment: Posting here.
 
Join Date: Mar 2012
Location: seattle
Posts: 643
"My shower fan exhaust is connected to this vertical pipe."

Oh, Brother...
__________________
bld999 is offline   Reply With Quote
Old 07-22-2015, 10:19 AM   #33
Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
 
Join Date: Sep 2005
Location: Northern IL
Posts: 18,264
Quote:
Originally Posted by John Galt III View Post
One more option! There should already be a vertical tube going through the attic and through the roof. It's the sewer vent pipe. My shower fan exhaust is connected to this vertical pipe. ...
Do ... not ... do ... this.

Did you know sewer gas can be explosive?

Did you know that a fan motor can create sparks?

Do ... not ... do ... this.


Against code - for a reason. Also, 1.5" PVC versus 4" duct is a huge cross sectional delta. Way too small for an exhaust vent.

-ERD50
__________________
ERD50 is offline   Reply With Quote
Old 07-22-2015, 12:53 PM   #34
Full time employment: Posting here.
 
Join Date: Aug 2014
Posts: 555
Quote:
Originally Posted by akck View Post
Our house was originally vented to the soffits. What I noticed when we painted the exterior was that the old paint was peeling and cracking where the vents were. We vented through the roof when we re-roofed the house. If you have extra shingles available, a handyman could install a roof vent. I'd make certain he's done it before or at least has replaced damaged shingles before. If you have a steep sloped roof, I'd look for a roofing contractor, although, you may have trouble getting one to take the job.


Sent from my iPad using Early Retirement Forum
Good installer won't need new shingles.

I've routed mine to either the eave or gable face. Had trouble with one being longer and the steam would condense on the cold metal and run back into the exhaust fan so that is something to watch out for.
__________________
ArkTinkerer is offline   Reply With Quote
Old 07-22-2015, 01:11 PM   #35
Moderator
MichaelB's Avatar
 
Join Date: Jan 2008
Location: Rocky Inlets
Posts: 24,426
I think I'll follow the flex duct to the current roof vent option for now. A new vent through the roof is the better option, but I don't want to mess with the roof right now and I have HOA considerations (not part of the discussion).

The next time roof work is being done, which will probably be in a couple of years, I'll ask them to install a new vent just for the shower.

Thanks to all, tip of the hat to Samclem for the helpful detail which I one day hope to make work here.
__________________
MichaelB is online now   Reply With Quote
Old 07-22-2015, 01:53 PM   #36
Thinks s/he gets paid by the post
ronin's Avatar
 
Join Date: Oct 2003
Posts: 1,190
Quote:
Originally Posted by MichaelB View Post
I think I'll follow the flex duct to the current roof vent option for now.
When we remodeled our bathroom this is what we did with the old unvented situation. Pretty easy and problem solved.
__________________
We are, as I have said, one equation short. Keynes
ronin is offline   Reply With Quote
Old 07-22-2015, 02:22 PM   #37
Thinks s/he gets paid by the post
Telly's Avatar
 
Join Date: Feb 2003
Posts: 1,448
Quote:
Originally Posted by John Galt III View Post
One more option! There should already be a vertical tube going through the attic and through the roof. It's the sewer vent pipe. My shower fan exhaust is connected to this vertical pipe. A pvc pipe goes horizontally from the shower fan to the vertical vent pipe. And no, there is no backdraft of odor from the sewer vent.............
That is SOoooo wrong, that I wonder if your residence instead has a common bathroom fan vent stack made out of PVC pipe, that collects multiple bath vent fans, and vents them out a vent-fans-only common stack. And that you have confused the pipes with the sewer stack. Common bath fan vent stacks are, heh heh, common, in hotels.

If not, and the bath vent fan actually is connected to the sewer stack, then there must have been an incredible doofus, and no inspection made of the work. Or, a later 'handyman" or resident doofus did it.
[I put "handyman" in quotes, because there are some that belong on a chain gang]
__________________

__________________
-- Telly, the D-I-Y guy --
Two fools dancing on the hands of time
Telly is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to remove this Exhaust Fan Cover?? Amethyst Other topics 14 04-12-2015 08:16 PM
Portable air conditioner exhaust connected to dryer vent? Frugalityisthenewblack Other topics 14 02-24-2012 08:34 AM
How clean is your dryer exhaust? Nords Other topics 32 09-14-2008 09:30 PM
Attic Insulation............. FinanceDude Other topics 24 10-21-2006 10:35 PM

 

 
All times are GMT -6. The time now is 07:08 AM.
 
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.