Stackable W/D Combo & A Vertical Vent

[north star]

& * & * &

Looking for some input on an application.

I have a "new" stackable washer / dryer combo unit proposed

to be installed in a commercial setting [ a medical clinic ],

and they have the exhaust duct with a horizontal run [ 12.5 ft. ]

and then turning in to a vertical run [ approx. 12-13 ft. ], ...to

exhaust on to the roof surfaces......Presently, I do not have any

information on the stackable appliance itself.......It appears to

be an electric, residential grade type.

Do any of you have any experience with this type of application ?

Typically, ...do the stackable W/D combo's have enough exhaust

pressure to adequately send the moisture and the lint to the

exterior, on this length of run ?.....Does anyone see any

problems with the lint exhausting to the roof surfaces ?

Thanks !

& * & * &

 

[Gregg Harris]

& * & * &Looking for some input on an application.

I have a "new" stackable washer / dryer combo unit proposed

to be installed in a commercial setting [ a medical clinic ],

and they have the exhaust duct with a horizontal run [ 12.5 ft. ]

and then turning in to a vertical run [ approx. 12-13 ft. ], ...to

exhaust on to the roof surfaces......Presently, I do not have any

information on the stackable appliance itself.......It appears to

be an electric, residential grade type.

Do any of you have any experience with this type of application ?

Typically, ...do the stackable W/D combo's have enough exhaust

pressure to adequately send the moisture and the lint to the

exterior, on this length of run ?.....Does anyone see any

problems with the lint exhausting to the roof surfaces ?

Thanks !

& * & * &

IMC 504

25 feet should not be a problem, damper and vertical clean out required

 

[cda]

I hate vertical runs, seen them clog

Not an IMC person but does the run and turns meet code???

what is the size of the pipe??

appears they are over the 35 feet!?!?!?!?!?!

Also, the problem down the line is when the change dryers?

 

[steveray]

IMC 504 25 feet should not be a problem, damper and vertical clean out required

Damper? Outside or inside? Inside only with FR assembly...No?

 

[north star]

+ + +

Presently, I do not have any information on the proposed appliance.

The plans have a "Not In Contract" [ NIC ] designation on them.

I am asking for more info on the whole setup!......The plans indicate

a 4" dia. duct with at least 3 long sweep types of turns [ duct elbows ],

maybe more, and at least one short sweep elbow......No info on the

damper or a clean out has been submitted......The RDP is deferring

this appliance to the owners.

Thanks to you all !

+ + +

 

[cda]

But it is part of the building and appears over 35 feet long

Tell them to leave that portion of the building exposed, so when the owner moves in you can see what is installed

 

[north star]

~ ~ ~

cda,

May I please ask how are you coming up with "over 35' long" ?

"and they have the exhaust duct with a horizontal run [ 12.5 ft. ]and then turning in to a vertical run [ approx. 12-13 ft. ]"

~ ~ ~

 

[cda]

dang holidays throws of my cyphering skills

never mind

still hate verticle runs

 

[fatboy]

I don't like vertical runs either, but code allows. Be interesting to see what the Man. specs say, that would be what I would want to see. Maybe there is a probition or limitation for vertical runs. Is it allowed to be used in a commercial application? Length doesn't look like an issue, if it becomes one, you can again fall back on the specs, 504.6.4.2.

 

[Gregg Harris]

+ + +Presently, I do not have any information on the proposed appliance.

The plans have a "Not In Contract" [ NIC ] designation on them.

I am asking for more info on the whole setup!......The plans indicate

a 4" dia. duct with at least 3 long sweep types of turns [ duct elbows ],

maybe more, and at least one short sweep elbow......No info on the

damper or a clean out has been submitted......The RDP is deferring

this appliance to the owners.

Thanks to you all !

+ + +

If indeed you measurements of pipe and 90s it will exceed 35 feet;

12.5 plus 13 =25.5 plus 5 long turn 90s (5x5)= 25 total equals 50.5 feet

 

[north star]

~ | ~ | ~

Gregg ( and others ),

I am not sure of the actual length of the long sweep elbows,

or the overall total length of the duct run......I am only going

off of what is indicated on the plans, which are lacking a lot

of details.

Aren't the "long sweep elbows" supposed to negate the

requirement for overall duct length reductions [ i.e. -

is this theory only, or actual standards ] ?

Whatever the actual duct length turns out to be,

would be covered by the stackable W/D manufacturer

and the allowable length of duct for their product ?

~ | ~ | ~

 

[fatboy]

Yes, manufacturers specs may allow it.

 

[Gregg Harris]

~ | ~ | ~Gregg ( and others ),

I am not sure of the actual length of the long sweep elbows,

or the overall total length of the duct run......I am only going

off of what is indicated on the plans, which are lacking a lot

of details.

Aren't the "long sweep elbows" supposed to negate the

requirement for overall duct length reductions [ i.e. -

is this theory only, or actual standards ] ?

Whatever the actual duct length turns out to be,

would be covered by the stackable W/D manufacturer

and the allowable length of duct for their product ?

~ | ~ | ~

Each fitting used will have an equivalent length that is added to the linear length of the pipe.

It will be doubtful that you will end up with a unit that will deliver 105 cfm through 4 inch pipe at the dimensions that you posted. More than likely a different location will be required.

 

[cda]

And when the dryer is changed out?? And owner thinks they have a code compliant dryer vent

Put it back for more details prior to release of permit