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10-28-2007, 01:46 PM
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Join Date: Jul 2007
Location: Baton Rouge, La
Posts: 54
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Laundry Room and Dryer Exhaust Vents
.............
Last edited by Clay White : 01-02-2008 at 01:10 PM.
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10-28-2007, 01:57 PM
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Member
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Join Date: Mar 2007
Location: Philadelphia PA
Posts: 1,110
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Re: Laundry Room and Dryer Exhaust Vents
Originally Posted by Clay White
Dryer exhaust vent line is installed between the wall framing and insulation.
Why oh why would they do that?! |
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10-28-2007, 03:45 PM
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Join Date: Mar 2007
Location: San Mateo, CA
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Re: Laundry Room and Dryer Exhaust Vents
Clay, if the area your working in is under the IRC chech 1502 in the 2006 IRC.
__________________
Jerry McCarthy
Construction Consultant
San Mateo, CA
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10-28-2007, 04:39 PM
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Member
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Join Date: Mar 2007
Location: Philadelphia PA
Posts: 1,110
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Re: Laundry Room and Dryer Exhaust Vents
Originally Posted by Clay White
John, are you saying that the way the routed the dryer line is wrong? If so, why?
Well, for one thing, it compresses the insulation. But honestly, I can't imagine why anyone would run the vent there instead of on the inside of the framing. It boggles my mind. |
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10-28-2007, 05:23 PM
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Join Date: Aug 2007
Location: Memphis TN.
Posts: 1,204
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Re: Laundry Room and Dryer Exhaust Vents
Originally Posted by Jerry McCarthy
Clay, if the area your working in is under the IRC chech 1502 in the 2006 IRC.
Jerry M,
Would this application be considered concealed under same section IRC 2003?
__________________
It Might have Choked Artie But it ain't gone'a choke Stymie!
Billy J. Stephens HI Service
Memphis TN.
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10-28-2007, 05:40 PM
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Join Date: Jun 2007
Location: Tn
Posts: 71
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Re: Laundry Room and Dryer Exhaust Vents
From what can be seen in the pic it looks there is quite a long run of dryer vent, what was the total ft or dryer vent?
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10-28-2007, 07:06 PM
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Join Date: Mar 2007
Location: Ormond Beach, Florida
Posts: 6,065
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Re: Laundry Room and Dryer Exhaust Vents
Originally Posted by Jerry McCarthy
Clay, if the area your working in is under the IRC chech 1502 in the 2006 IRC.
Jerry Mc.,
Is that saying 'Yes, it is okay.', or, 'No, that is not okay because of ... '?
What *part* of 1502 are you thinking about? |
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10-29-2007, 07:37 AM
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Join Date: Mar 2007
Location: San Mateo, CA
Posts: 847
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Re: Laundry Room and Dryer Exhaust Vents
IRC-2006 - SECTION M1502
CLOTHES DRYER EXHAUST M1502: 1 General. Dryer exhaust systems shall be independent of all other systems, and shall convey the moisture to the outdoors.
Exception: This section shall not apply to listed and labeled condensing (ductless) clothes dryers.
M1502.2 Duct termination. Exhaust ducts shall terminate on the outside of the building. Exhaust duct terminations shall be in accordance with the dryer manufacturer’s installation instructions. Exhaust ducts shall terminate not less than 3 feet (914 mm) in any direction from openings into buildings. Exhaust duct terminations shall be equipped with a backdraft damper. Screens shall not be installed at the duct termination.
M1502.3 Duct size. The diameter of the exhaust duct shall be as required by the clothes dryer’s listing and the manufacturer’s installation instructions.
M1502.4 Transition ducts. Transition ducts shall not be concealed within construction. Flexible transition ducts used to connect the dryer to the exhaust duct system shall be limited to single lengths, not to exceed 8 feet (2438 mm) and shall be listed and labeled in accordance with UL 2158A.
M1502.5 Duct construction. Exhaust ducts shall be constructed of minimum 0.016-inch-thick (0.4 mm) rigid meta ducts, having smooth interior surfaces with joints running in the direction of air flow. Exhaust ducts shall not be connected with sheet-metal screws or fastening means which extend into the duct.
M1502.6 Duct length. The maximum length of a clothes dryer exhaust duct shall not exceed 25 feet (7620 mm) from the dryer location to the wall or roof termination. The maximum length of the duct shall be reduced 2.5 feet (762 mm) for each 45-degree (0.8 rad) bend and 5 feet (1524 mm) for each 90-degree (1.6 rad) bend. The maximum length of the exhaust duct does not include the transition duct.
Exceptions:
1. Where the make and model of the clothes dryer to be installed is known and the manufacturer’s installation instructions for the dryer are provided to the building official, the maximum length of the exhaust duct, including any transition duct, shall be permitted to be in accordance with the dryer manufacturer’s installation instructions.
2. Where large-radius 45-degree (0.8 rad) and 90-degree (1.6 rad) bends are installed, determination
of the equivalent length of clothes dryer exhaust duct for each bend by engineering calculation in accordance with the ASHRAE Fundamentals Handbook shall be permitted.
Find Waldo?
__________________
Jerry McCarthy
Construction Consultant
San Mateo, CA
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10-29-2007, 10:57 AM
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Member
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Join Date: Aug 2007
Location: Memphis TN.
Posts: 1,204
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Re: Laundry Room and Dryer Exhaust Vents
Originally Posted by Jerry McCarthy
IRC-2006 - SECTION M1502
CLOTHES DRYER EXHAUST M1502: 1 General. Dryer exhaust systems shall be independent of all other systems,
M1502.4 Transition ducts. Transition ducts shall not be concealed within construction.
Find Waldo?
My vote,
__________________
It Might have Choked Artie But it ain't gone'a choke Stymie!
Billy J. Stephens HI Service
Memphis TN.
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10-29-2007, 11:26 AM
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Join Date: Aug 2007
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Re: Laundry Room and Dryer Exhaust Vents
Originally Posted by Jeff Eastman
duct is not concealed.
Before or after you remove the braces?
__________________
It Might have Choked Artie But it ain't gone'a choke Stymie!
Billy J. Stephens HI Service
Memphis TN.
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10-29-2007, 11:32 AM
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Join Date: Mar 2007
Location: Philadelphia PA
Posts: 1,110
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Re: Laundry Room and Dryer Exhaust Vents
M1502.4 Transition ducts. Transition ducts shall not be concealed within construction.
That's not "transition" duct, anyway, is it?
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10-29-2007, 12:28 PM
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Join Date: Mar 2007
Location: Ormond Beach, Florida
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Re: Laundry Room and Dryer Exhaust Vents
Quote from Jerry Mc.'s post:
IRC-2006 - SECTION M1502
- CLOTHES DRYER EXHAUST M1502: 1 General. Dryer exhaust systems shall be independent of all other systems, and shall convey the moisture to the outdoors. (Jerry P. note: It is.)
- - Exception: This section shall not apply to listed and labeled condensing (ductless) clothes dryers. (Jerry P. note: This does not apply.)
- M1502.2 Duct termination. Exhaust ducts shall terminate on the outside of the building. Exhaust duct terminations shall be in accordance with the dryer manufacturer’s installation instructions. Exhaust ducts shall terminate not less than 3 feet (914 mm) in any direction from openings into buildings. Exhaust duct terminations shall be equipped with a backdraft damper. Screens shall not be installed at the duct termination. (Jerry P. note: It does go outside. Regarding the other parts of this section - insufficient information given.)
- M1502.3 Duct size. The diameter of the exhaust duct shall be as required by the clothes dryer’s listing and the manufacturer’s installation instructions. (Jerry P. note: It looks like 4 inch, which is good, unless the manufacturer states larger - insufficient information given to know that.)
- M1502.4 Transition ducts. Transition ducts shall not be concealed within construction. Flexible transition ducts used to connect the dryer to the exhaust duct system shall be limited to single lengths, not to exceed 8 feet (2438 mm) and shall be listed and labeled in accordance with UL 2158A. (Jerry P. note: Transition ducts are the dryer connectors - those plastic and foil thingys which should be either rigid or flexible metal. Thus, this does not apply to that duct.)
- M1502.5 Duct construction. Exhaust ducts shall be constructed of minimum 0.016-inch-thick (0.4 mm) rigid meta ducts, having smooth interior surfaces with joints running in the direction of air flow. Exhaust ducts shall not be connected with sheet-metal screws or fastening means which extend into the duct. (Jerry P. note: Looks like it meets that, but I was not there and did not put my gage on it. Regarding the other parts of this section - insufficient information given)
- M1502.6 Duct length. The maximum length of a clothes dryer exhaust duct shall not exceed 25 feet (7620 mm) from the dryer location to the wall or roof termination. The maximum length of the duct shall be reduced 2.5 feet (762 mm) for each 45-degree (0.8 rad) bend and 5 feet (1524 mm) for each 90-degree (1.6 rad) bend. The maximum length of the exhaust duct does not include the transition duct. (Jerry P. note: Looks like it meets the exceptions - see Exceptions.)
- - Exceptions:
- - - 1. Where the make and model of the clothes dryer to be installed is known and the manufacturer’s installation instructions for the dryer are provided to the building official, the maximum length of the exhaust duct, including any transition duct, shall be permitted to be in accordance with the dryer manufacturer’s installation instructions. (Jerry P. note: Some allow for up to 90 feet, most allow for up to 50 feet. Not enough information given to know for sure.)
- - - 2. Where large-radius 45-degree (0.8 rad) and 90-degree (1.6 rad) bends are installed, determination of the equivalent length of clothes dryer exhaust duct for each bend by engineering calculation in accordance with the ASHRAE Fundamentals Handbook shall be permitted. (Jerry P. note: See response to Exception 1. above.)
Find Waldo?(Jerry P. note: NOPE.)
How about you telling me where Waldo is?  |
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10-29-2007, 12:30 PM
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Member
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Join Date: Aug 2007
Location: Memphis TN.
Posts: 1,204
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Re: Laundry Room and Dryer Exhaust Vents
Originally Posted by John Arnold
M1502.4 Transition ducts. Transition ducts shall not be concealed within construction.
That's not "transition" duct, anyway, is it?
John A.
IRC 2003 M1501.1
Flexible transition ducts shall be limited to single lengths,not to exceed 8 feet. (It's not flexible so it's not transition duct?)
I cast my Vote whats yours? 
__________________
It Might have Choked Artie But it ain't gone'a choke Stymie!
Billy J. Stephens HI Service
Memphis TN.
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10-29-2007, 12:37 PM
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Re: Laundry Room and Dryer Exhaust Vents
Originally Posted by Billy Stephens
I cast my Vote whats yours?
Billy,
Not sure what you cast your vote for, but if it is that flexible duct laying on the ceiling, that is the laundry room exhaust duct, not the dryer duct, that (the dryer exhaust duct) is run behind the truss next to the insulation.
So, I guess I'm asking ... What did you vote for? |
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10-29-2007, 12:45 PM
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Re: Laundry Room and Dryer Exhaust Vents
Originally Posted by Billy Stephens
Before or after you remove the braces?
I'm going with concealed.( Part concealed.)
A little concealed.  Not much concealed.
Or maybe independent .(Craw Fishing)
__________________
It Might have Choked Artie But it ain't gone'a choke Stymie!
Billy J. Stephens HI Service
Memphis TN.
Last edited by Billy Stephens : 10-29-2007 at 12:51 PM.
Reason: Craw Fishing Added
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10-29-2007, 12:49 PM
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Join Date: Mar 2007
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Re: Laundry Room and Dryer Exhaust Vents
Originally Posted by Billy Stephens
I'm going with concealed.( Part concealed.)
A little concealed. Not much concealed.
*WHAT* concealed?
"M1502.4 Transition ducts. Transition ducts shall not be concealed within construction."?
There are no "transition ducts" in that photo ... thus I am not following you "concealed" part.  |
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10-29-2007, 01:17 PM
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Re: Laundry Room and Dryer Exhaust Vents
Originally Posted by Jerry Peck
*WHAT* concealed?
"M1502.4 Transition ducts. Transition ducts shall not be concealed within construction."?
There are no "transition ducts" in that photo ... thus I am not following you "concealed" part.
Mr. Peck not all Ducts label as transition are the slinky style. It looks like the termination
point would be at the soffet thus a metal transition duct.( just guessing )
__________________
It Might have Choked Artie But it ain't gone'a choke Stymie!
Billy J. Stephens HI Service
Memphis TN.
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10-29-2007, 01:26 PM
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Member
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Join Date: Mar 2007
Location: Philadelphia PA
Posts: 1,110
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Re: Laundry Room and Dryer Exhaust Vents
Originally Posted by Billy Stephens
It looks like the termination point would be at the soffet thus a metal transition duct.( just guessing )
A transition duct connects the appliance to the (main?) duct. It does not connect the appliance to the backdraft damper or whatever termination is used. |
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