## How do you calculate boil off rate?

Gradually fill the kettle with measured volumes of water and make the appropriate marks. Measure the volume both at the beginning and end of the boil and calculate the difference. Divide by the boiling time in hours to determine the evaporation rate.

Is mash out necessary for BIAB?

There’s no reason for that type of mashout step with BIAB. Mashout is to rinse the grains of residual sugar which you can’t do with wort that’s already in equal solution. It’s like trying to chill 200° water using 200° cooling water.

How efficient is brew in a bag?

Generally speaking, the efficiency of BIAB should be between 74-84% for beer OG’s between 1.040 – 1.075, lower OG having higher efficiency than high OG.

### How long should BIAB steep grains?

Here’s what a typical BIAB brew day looks like: Heat full volume of brewing water water to ~7˚F above target strike temp. Add bag full of grains to brewing liquor, stir to reach mash temp, cover kettle with sleeping bag, set timer for 60 minutes.

What is the average boil off rate?

While it varies widely depending on kettle dimensions and a few other variables, an average boil-off rate of around 14% is commonly accepted at the home-brew level, which also happens to be about what it appears BeerSmith was telling you.

What happens if you boil wort too long?

Boiling ceases the remaining enzyme activity and fixes the carbohydrate composition of the wort, and hence the dextrin content of the final beer. Dextrins are complex carbohydrates. In the absence of enzyme activity to break them down into simpler sugars, brewers yeast cannot ferment them.

#### Can you mash for too long?

Beer cannot be mashed for too long, but if the wort is allowed to sit in the mash for over twenty-four hours, it may begin to sour. There is no point in leaving a beer to mash for longer than 120 minutes since most of the enzyme conversion in mashing is accomplished in the first 60 minutes of mashing.

Should I Sparge with BIAB?

Sparging (this is the step not all brewers do) is a process that some all grain brewers use to rinse as many remaining sugars as possible out of their mash. I say some, because with BIAB (Brew In A Bag) brewing, a sparge is optional, but can help boost efficiency.

Should I squeeze grain bag?

Squeezing is not recommended. Another myth is that squeezing the mash bag will extract tannins and also make the wort cloudy. Squeezing the bag of grain and tannins are not synonymous.

## What is needed for BIAB?

The BIAB Equipment All you need is a Kettle, Large Bag, Heat Source and something to stir with. Your kettle needs to be big enough to handle the full volume of liquor (hot water) and grain.

Should I cover my wort when boiling?

Covering your brew kettle will help achieve a quicker boil, but it if the cover is left on during the boil it can also contribute to an off-flavor in your finished product. Once you have the liquid boiling, leave the cover off. We now have wort!

Why do you boil wort for an hour?

The idea of a 60-minute boil is most likely rooted in optimizing hops utilization. After an hour, the alpha acids in the hops should all be isomerized and additional hops utilization drops off. A shorter boil leaves unconverted alpha acids, while a longer one doesn’t pick up any more hops bitterness.