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-   -   Indoor electric brewers unite, I need exhaust hood ideas! (http://www.homebrewtalk.com/f11/indoor-electric-brewers-unite-i-need-exhaust-hood-ideas-108520/)

HarvInSTL 03-13-2009 06:23 PM

Indoor electric brewers unite, I need exhaust hood ideas!
 
I'm in the final stages of converting to an all electric indoor brewery. My final major hurdle is designing/purchasing a proper exhaust system.

So please chime in with your experiences and/or pictures of your exhaust setups.

Thanks!

SpanishCastleAle 03-13-2009 07:11 PM

I'm not sure how much help this will be because I deal with exhaust hoods/fans at work and that's different from home.

For the best results you want the fan 'pulling' the air out so it needs to be on the roof (or as close to it as possible). The crap ones in many homes are just a fan that exhausts into the room (like 2' away from where it was pulled...lol).

Most homes (at least in the south) don't have any make-up air...they just recirculate. Obv any 'real' exhaust fan is gonna pull air out of the room and I don't know how home exhaust systems handle that. You might consider some make-up air.

In a chemical lab...ALL air from the A/C/Heat is make-up air. 100% percent of it. All air is from the outside and all of it gets exhausted by the exhaust system...none of it is recirculated. Not very efficient regarding cost!

conpewter 03-13-2009 07:44 PM

I just have a regular range hood over my brew pot and HLT. I had to go cheap so bought it off craigslist ($15... new in box). I think it is fairly low CFM so I may replace it in the future. For the most part it works just fine and sucks most of the moisture and smell (wife doesn't like it) out of the house.

wilserbrewer 03-14-2009 03:28 AM

Quote:

Originally Posted by HarvInSTL (Post 1195578)
I'm in the final stages of converting to an all electric indoor brewery. My final major hurdle is designing/purchasing a proper exhaust system.

So please chime in with your experiences and/or pictures of your exhaust setups.

Thanks!

Well, so how much you boiling? How much power do you have? This will determine what kind of vent you really need. I boil around 8 gal. w/ electric in my basement w/ nothing more than a simple fan propped up in a double hung window adjacent to the kettle. You can smell the boil in progress in the basement, not upstairs though, but I usually run the fan for an hour or so while the wort is cooling.

IMO a simple fan will clear the humidity if left to run for a bit post boil. The choice is yours...sure I'd love a blingin stainless hood over my kettle but is it worth it to you?? We are not generating toxicity, only humidity, given a chance, even a nominal amount of airlfow will rebalance the room. YMMV

HarvInSTL 03-14-2009 06:44 AM

I will be brewing in my basement and my major concern is the moisture. I have hardwood floors above and don't want to ruin them.

I will be boiling 13 gallon batches (down to 11-11.5 post boil) with a 4500watt ultra low density element in my BK and a 4500 watt high density element in my HLT.

So I've had two trains of thought. First would be to just build a hood out of MDF or plywood, seal it and put that thin laminate on the inside. (Same stuff people use on the inside of fridges when they remove the door shelves for a kegerator.

My second thought was to put two 30" range hoods together, upgrade the fans and have them both exhaust out the window. Realistically the closer to the kettles I would assume the better, as they would capture more moisture hopefully eliminated the possibility of the steam escaping around the hood(s). Since I was thinking about using dryer vent hose, I was considering making the hood(s) able to move up and down.

Which would allow me to move them up out of the way while I stir the mash or add hops to the boil.

SpanishCastleAle 03-14-2009 11:46 AM

With all that moisture getting exhausted I would expect a lot of condensation on the inside of the duct...enough to puddle at low points or drip out of the duct at the ends...maybe something to watch out for.

EDIT: I would also expect the whole thing to get funky pretty quickly so make it easy to clean.

drayman86 03-14-2009 04:59 PM

Quote:

Originally Posted by conpewter (Post 1195786)
I just have a regular range hood over my brew pot and HLT. I had to go cheap so bought it off craigslist ($15... new in box). I think it is fairly low CFM so I may replace it in the future.

Regular, inexpensive range hoods are not a good application. Inexpensive hoods typically have very low CFM ratings, and cannot remove enough moisture, particularly from a basement room.

Here's my installation. I'm fortunate in that I don't have finished ceilings in my brewing area. Pics are clickable thumbs:

http://i46.photobucket.com/albums/f1...h_DSC00019.jpg


http://i46.photobucket.com/albums/f1...h_DSC00020.jpg

This fan is available HOME DEPOT

Fan, ductwork, exterior exhaust vent, etc. were less than $125. I'd recommend NOT skimping on an exhaust system; you'll just end up installing a proper system, and risk moisture damage to building construction materials.


You can view the product specifications including size and installation instructions HERE.

The fan is rated at 160CFM, which blows away the typical residential kitchen range hood. I too have hardwood floors above my brew area and excess moisture was also a concern. I've brewed over 6 times already with this ventilation, and have experienced ZERO moisture problems such as stained floor joists or odors permeating the rest of the house.


Electric brewing is THE way to go for indoor applications. Check out my system HERE.

drayman86 03-14-2009 05:01 PM

Quote:

Originally Posted by SpanishCastleAle (Post 1196878)
EDIT: I would also expect the whole thing to get funky pretty quickly so make it easy to clean.

Wouldn't expect that. Only thing going through the ductwork will be water vapor and a bit of dust from surrounding air. If the brew locations isn't too dusty, there shouldn't be an issue with dirty ducts.

SpanishCastleAle 03-16-2009 12:33 PM

You have mnore experience with homebrew ventilating drayman...but that's not just water vapor. It carries some 'funk' with it too. But it may not be enough to be that much of a problem. Maybe see after 20 brews or so.

I realize it's not nearly like a full-scale restaurant kitchen but I used to have to clean the exhaust hoods in restaurant kitchens. Just one day builds up a lot of nasty ****...there are drip trays that if you don't empty will overflow from grease (and grease is non-volatile...so it's obv getting 'carried' up by the moisture).

kal 05-23-2009 07:03 PM

Careful with typical range hoods. The fans in those are not meant to drive any length of duct as the have very little static pressure. You need an inline fan such as those from vortex like this one: Atmosphere Inc -- High Performance Inline Duct Blowers
They don't lose CFM as much over longer/small runs with turns.

Even the inexpensive range hoods (under $50) have almost 200 CFM rating but that's only 200 CFM if you run it directly outside with no duct. Stick any length of duct on there and they'll drop way down.

Then you need a condensate hood if you want to do things right:

http://farm3.static.flickr.com/2346/...4ec41370a7.jpg

http://www.magcommercial.com/images/condensate_hood.gif

They have a drain for condensation run off. Simply attach a vinyl hose and have it dump somewhere. I'm looking at something like this for my setup. They are not inexpensive however since they're industrial. Any hints are appreciated!

Kal


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