Exhaust?

[rabeb25]

1200cfm fan, 10" make up air on bottom left of stand. I only run it on about 1/4 speed. It's super quite and you could never tell I was brewing, no smell/condensation whatsoever.

 

[dburgette]

http://www.amazon.com/dp/B002JQ14F8/?tag=skimlinks_replacement-20

Is this the active air that I see some of you going with?

 

[forcabrew]

http://www.amazon.com/Hydrofarm-Active-Air-inch-In-Line/dp/B002JQ14F8/ref=sr_1_1?s=lawn-garden&ie=UTF8&qid=1338756312&sr=1-1

Is this the active air that I see some of you going with?

That's the one I got

 

[bullywee]

I got the 8" and it's more than enough

 

[kpr121]

I just rigged this cheapo exhaust up for my garage e-brewery. It’s a bathroom exhaust (I’d estimate at about 80 cfm based on experience with other exhaust fans) that I bought at a construction reuse place for 3 bucks. All other materials were acquired in either my dad’s or my garage – he bended some scrap sheet metal for a ‘hood’, the flexible ducting is run to a panel of insulation fit into the window about 3 feet away from the kettle, and electric cord is an old extension cord.

Havent done a full brew day on it but I tested it by boiling about 3 gallons of water – it didn’t pull out all the steam right away but it was definitely a whole lot better than nothing! And after running it for about 30 minutes post boil I didn’t detect any excess humidity in the garage.

 

[Dgonza9]

I got the 8" and it's more than enough

Me too.

 

[shroomzofdoom]

Just figured I'd subscribe and show some mockup photos of my ActiveAir 6"---also seeking some feedback.



I need to be able to break mine down and stow it away, I may go with sch 40 for the elbow and long run instead. But since my keg holes are around 11.5", I picked up a 12"x6" reducer at the local HVAC supply and will probably suspend it few inches above the opening. My plan is to plumb it so that condensation goes toward the fan and will install a small vinyl hose to channel condensation to the sink. I may also drill small weep holes in the AA case as well at the lowest point.

If you put the fan directly over the source with too little fresh air to dilute the saturated air from the boil, condensation will form. I was thinking if I can suck more fresh air into the stream--and the air/boiloff mixture at the fan is below the 95% rh recommended by the manufacturer--the fan should be able to eliminate it without much condensation. Flex duct hose, semi rigid, elbows, etc--are all places to collect. Which is why I abandoned this idea as soon as I took the photo.



Won't be able to do a boil/condensation test for a few days.

 

[shroomzofdoom]

I placed the 6x12" duct reducer offset a bit, just sitting on the top rim of the keg and it works quite well. Been boiling water for about 2 hrs and no sweaty walls! There's no condensation whatsoever and the temp inside of the duct at full boil is only 76 degrees (fan off, it went to 100).

I drilled a small weep hole with a 3/32" bit at the lowest point of the AA housing and nothing comes out of it at all. Just have to hang it a bit higher...Success!

EDIT: I never realized how suspicious looking a bright GREEN grow fan would look until it was in my window! Luckily, I'll only be using it a few hours each week...and it's not illegal to grow beer in NJ.