Home Brewing

 
In the world of beer brewing, you have seen the terms partial boil and full boil. You may be wondering just what do they mean? The boil is what starts the beer making process. You are making the wort, which will eventually become your beer. All ingredients for beer brewing are combined in the boil.

Partial and full boil refers to the amount of wort you are boiling. Therefore, a partial boil is only boiling a portion of the wort, while a full boil is just that--a full amount of wort. Most beer brewing recipes call for brewing 5 gallons of wort. However, there are a couple different ways to produce a full 5 gallons of wort.

If you are doing a full boil, then you are boiling a full 5 gallons of liquid at the same time in your brew pot. This requires you to have a large enough pot to boil 5 gallons of liquid in, which means your pot must be at least 6.5 gallons in size. You must also have a heat source that is capable of bringing 5 gallons of liquid to a boil.

                                                                                                                          

An important thing to keep in mind is that if you are boiling 5 gallons of wort, a full boil, you want to end up with 5 gallons of wort, which means you will need to start with over 5 gallons of liquid. This requires a large enough pot. The additional water added in the beginning is to allow for the inevitable evaporation created by the boiling. You may need to start with up to an additional gallon to compensate for this.

For most new to beer brewing, you will likely start with a partial boil. It is common in extract brewing to do partial boils. You boil 2..5 to 3 gallons of wort in the brewpot, then you add the wort to the fermenter. You then add enough water to the wort to make a full 5 gallons. This is known as topping off.

To make it simple, a full boil means that all 5 gallons of the wort are boiled in the brew pot together. In a partial boil you boil a portion of the wort in the brew pot, and then additional water is added after the boil (in the fermenter) to complete the 5 gallon volume.

 Partial boils are necessary for those that live in apartments and do not have access to larger pots and propane burners. Even if you have access to these, you may still choose to boil using only partial boils. It keeps the beer brewing process simpler, and allows you to do it inside. You will see partial boils used as a part of extract and partial mash brewing. All grain brewing uses full boils.

 If you are just getting started beer brewing, you will likely begin with extract brewing, which means you will probably doing partial boils at first, and topping off your wort. Full boils are preferred by many home brewers because they produce more flavorful beer. However, you can still make quality, delicious home brew by using a partial boil.

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