Brewing a half batch

[pirate357]

Hey everyone. I haven't brewed in a while but decided I would like to brew a half batch, or about 3 gallons. I used the recipe generator to find make a decent looking full extract recipe. My main question is if there is anything i need to do differently with a half batch. Is the increased distance between the beer and the lid of my fermentor going to be a problem? Help would be appreciated. Thanks.

[slothrob]

I make mostly 3 gallon batches these days. There aren't a lot of additional considerations.

As you might have learned, you probably have to plan for a higher percent boil-off, depending on the kettle and burner you use. It does allow you to brew all-grain on the stove easily, though.

I ferment them in a 5 gallon carboy and I don't believe that there are any issues. You might even get a little positive gain from having a little extra oxygen around when it's needed. I haven't noticed any oxidation problems with these beers.

I wouldn't secondary in a 5 gallon carboy though. That would probably risk oxidation damage. I either skip the secondary or use a 3 gallon carboy.

You can also lose a higher percent of the wort is in a bottling bucket than you would with a 5 gallon batch.

[pirate357]

About how long should a half batch take to ferment before bottling? Thanks.

[slothrob]

It takes just as long to ferment a half batch as it does a full batch.

I'd advise, as a rule of thumb, 3 weeks before bottling for most Ales. You might get away with 2 weeks for some beers, particularly a low gravity beer made with a very flocculant yeast, like an Ordinary Bitter, but it's always a little risky if you are bottling and the beer is apt to have tasted better and been clearer if you left it a little longer.