Originally Posted By: jpeck
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Boink! (as my head falls against the desk)
I know it's a roof vent, but WHAT is it venting?
This is like pulling a molar way back there, open wide, wider, w-i-d-e-r, there, now ... WHAT is it venting?
At least that is what I thought the question was. What was this called? Depends on what it is being used to vent.
It is also wrong because, to my knowledge, that type is not approved for high wind locations (like Broward County). I explain to my client that the top is only held on by four small rivets, and it is not uncommon to see 2 or 3 rivets loose or missing, with the cap blown back, hanging by the other rivet (or two). This should be the goose neck type.
This also cannot be used for a dryer, as the dryer exhaust vent roof cap flashings need to have a damper and need to be designed so that the air flow does not hit a flat blockage at the discharge end, but be turned or angled to direct the flow without creating back pressure.
This also cannot be used for a cooking unit as the air is considered grease laden and the grease could collect on the underside of the flat top, dripping back down the exhaust duct.
It also cannot be used for bathroom vents are it needs to be screened, and there is no proper way to screen it.
And, of course, it cannot be used for a gas vent.
Did I miss one?