Bathroom vent piping to "Near Exterior"?

[Marcel R. Cyr]

How about the dryer Joe when it is in use with those winds and no flapper at the end of the duct?

[Chuck Evans]

Originally Posted by mcyr

How about the dryer Joe when it is in use with those winds and no flapper at the end of the duct?

I'm with Marcel. Dryer vent should have a backdraft damper (it's possible there is one at the dryer connection, but not common). Dryer vent should never have a screen (I would consider the louvered gable vent as a screen) to trap lint.

I would make minor mention of the bath vents (SOP requirement in TX). I would definitely call out the dryer vent which will make a big mess and may become obstructed over time.

[Joe Funderburk, CMI]

Originally Posted by mcyr

How about the dryer Joe when it is in use with those winds and no flapper at the end of the duct?

Definitely called out. But I'm more concerned with insects or birds building nests than with air blowing in.

The back-draft damper for bathroom exhausts is at the fan. But should have one too if it vents outside the home.

[mnahrgang]

Originally Posted by belliott

Mark you do know that simply because for some reason you never had a problem that it is still a issue?

Of course, but that's not the point. The point is, the AHJ doesn't require it, and anecdotal evidence points to the probability that it isn't a big concern.

[Bob Elliott]

Originally Posted by mnahrgang

Of course, but that's not the point. The point is, the AHJ doesn't require it, and anecdotal evidence points to the probability that it isn't a big concern.

I guess i am asking if you make it a concern or even a mention in your report.

I recently had one(no time to dig pics tonight) where the exhausts were up to the bottom of the roof pots and blocking over 50% of the openings.
At what point would you consider blocking attic ventilation an issue?

[mnahrgang]

I mention it in the report, but not as any big deal.

As to blocking ventilation, they are only 18 inches above the insulation. So no blockage.

[Bob Elliott]

Originally Posted by mnahrgang

I mention it in the report, but not as any big deal.

As to blocking ventilation, they are only 18 inches above the insulation. So no blockage.

OK
Just to get this straight I am asking what percentage of a roof vent needs to be blocked by another component before it is a concern in your report.

Anyone?

[Christopher Currins]

SECTION M1501 GENERAL

M1501.1 Outdoor discharge.

The air removed by every mechanical exhaust system shall be discharged to the outdoors. Air shall not be exhausted into an attic, soffit, ridge vent or crawl space.



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.


I always mention bath exhaust discharging into attic. Especially when they are buried in a foot of insulation and the owner wonders why their bath vents are always soooo dirty.

[Buck Hartley, CMI]

If it is not a problem why was it made a requirement in the C book

[mnahrgang]

Originally Posted by bhartley

If it is not a problem why was it made a requirement in the C book

Can't answer that, other than it CAN be a problem. I would image that this is just one example of why AHJ's have the liberty to enforce or not enforce certain codes as they see fit.

[Henry Martinez]

Originally Posted by ccurrins

SECTION M1501 GENERAL

M1501.1 Outdoor discharge.

The air removed by every mechanical exhaust system shall be discharged to the outdoors. Air shall not be exhausted into an attic, soffit, ridge vent or crawl space.



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.


I always mention bath exhaust discharging into attic. Especially when they are buried in a foot of insulation and the owner wonders why their bath vents are always soooo dirty.

Makes one wonder , how come this isnt a standard everywhere? county city , municipal , state. it should all be uniform when the area or climate does not affect the intent or purpose of the structure or its existence.

[Darin Redding]

Inspection this week. When they re-roofed they decided to skip it.