Author Topic: Placement of Vent for Condensate Hood  (Read 1557 times)

Offline blatz

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Placement of Vent for Condensate Hood
« on: July 15, 2011, 07:59:27 AM »
Hey all

I'm finally at the point where I need to position my condensate hood and venting. 

The hood is 6' and has an 8" round exhaust riser on the top to which I will reduce to 6" and hook up a vortex fan. 

My question is:  would it be better to vent out of the room above the hood which would have the least amount of distance travelled or vent out the perpendicular wall, which would allow me to slope the ducting a bit to prevent water from forming and dripping back in.

My other concern is I heard, though have had trouble confirming that if I need a make up air vent (which I may not - our a/c people are calculating the CFM loss vs A/C) it cannot be on the same wall as the vent - I would think a makeup air vent would be best served directly above the kettles in between the kettles and the hood.

Thoughts/advice/comments appreciated.
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Offline Jimmy K

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Re: Placement of Vent for Condensate Hood
« Reply #1 on: July 15, 2011, 09:30:48 AM »
Propane? Then your venting two things - moisture and CO2 (exhaust from the burners). The second is much more important the the first as it can kill you. If you're trying to vent the whole room, then the opposite wall is correct. But for just the brewery space you could change that. Still, I'd position the make up vent below the burners.
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Offline Slowbrew

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Re: Placement of Vent for Condensate Hood
« Reply #2 on: July 15, 2011, 09:39:52 AM »
Propane? Then your venting two things - moisture and CO2 (exhaust from the burners). The second is much more important the the first as it can kill you. If you're trying to vent the whole room, then the opposite wall is correct. But for just the brewery space you could change that. Still, I'd position the make up vent below the burners.

Just to make sure we're all clear.  It's not CO2 he needs to worry about it's CO (dioxide verses Monoxide).  Too much C02 can be a problem but it doesn't take a lot of CO to become a very big problem.

Other than that, I agree with you advice.

Paul
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Offline Jimmy K

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Re: Placement of Vent for Condensate Hood
« Reply #3 on: July 15, 2011, 10:00:12 AM »
That right. I was thinking CO2 buildup leads to low O2, which leads to CO buildup. But that's my convoluted thinking. CO that is really the problem.
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Offline blatz

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Re: Placement of Vent for Condensate Hood
« Reply #4 on: July 15, 2011, 10:01:56 AM »
Electric elements not propane
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Offline Jimmy K

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Re: Placement of Vent for Condensate Hood
« Reply #5 on: July 15, 2011, 10:04:30 AM »
Then I don't think it would matter much where the make-up vent is.
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Offline blatz

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Re: Placement of Vent for Condensate Hood
« Reply #6 on: July 15, 2011, 10:18:40 AM »
Cool.  thanks. 
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Offline ckpash88

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Re: Placement of Vent for Condensate Hood
« Reply #7 on: July 15, 2011, 10:26:44 AM »
I would slope the exhuast pipe bc you have to worry about condensation and if you are in a area that gets cold it could freeze and cause alot of damage. When we vent furnace we have a aggressive slope to avoid condensation and the pipes from freezing
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Offline tom

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Re: Placement of Vent for Condensate Hood
« Reply #8 on: July 15, 2011, 10:35:08 AM »
What slope do you recommend?
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Offline ckpash88

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Re: Placement of Vent for Condensate Hood
« Reply #9 on: July 15, 2011, 10:42:32 AM »
It really all depends on code when I install furnace each city and county is different. But it's normally 1-3 degrees sloped back to the furncae.
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Offline ckpash88

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Re: Placement of Vent for Condensate Hood
« Reply #10 on: July 15, 2011, 10:49:17 AM »
1-3 sounds right but another way to look at it is for every foot you go out raise it a 1/4 of a inch for example a 8 foot pipe the end that going outside is 2 inches higher the then the source
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Offline blatz

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Re: Placement of Vent for Condensate Hood
« Reply #11 on: July 15, 2011, 10:51:30 AM »
hmm - for this application, I would imagine I would want it sloped downward at the exit/wall so that water condensate can drip out the vent, rather than running back into the fan or even the hood opening itself?
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Offline ckpash88

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Re: Placement of Vent for Condensate Hood
« Reply #12 on: July 15, 2011, 11:04:06 AM »
Yeah probably I am speaking from experience with furnace but they have built in drains. The theory is that the condensation stays in the condition air space and does not freeze and cause a blockage in the pipe.
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Offline blatz

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Re: Placement of Vent for Condensate Hood
« Reply #13 on: July 15, 2011, 11:18:31 AM »
believe me - I will never, ever have a problem with freezing.  ;)
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Offline ckpash88

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Re: Placement of Vent for Condensate Hood
« Reply #14 on: July 15, 2011, 11:22:23 AM »
Then I would slope it out and away. I live in Minnesota we get cold lol
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