Hi Dan and congrats on your maiden voyage

In three-vessel brewing, it's not uncommon to mash for 60 minutes however, mashing is followed by sparging which can take 30 minutes or more. In single-vessel all-grain, as you say, we are mashing and sparging at the same time. Your grain bill's contact time with water is important as our tests have shown. While some grain bills will convert more quickly (don't use iodine tests), nearly all will result in better extraction with a 90 minute mash so it is a great safe time to work off.

90 minutes is also a safe time for the boil. A lot happens during the boil. Have a read of this article.

The BIABacus reduces your grain bill if you increase the boil time because of the following:
1. An increased boil time means increased evaporation.
2. Increased evaporation means you need more water to start with.
3. Increased water means you can "clean" your grain better*.
4. If you can clean your grain better, you need less grain to get the same result.

*Imagine a pair of very dirty, white jeans. Now put those jeans in a bucket with 10L of water, jiggle them around, squeeze them, and then hang them out to dry. If you did the same thing with a bucket full of 20L of water, which would give you the whiter jeans?

Hope that helps
PP

Hey Pat, some parts of this are gained from mash and other parts from boil. The heading sentence mentions increasing boil time but I believe two of your four points are actually from the longer mash time. So for clarity...

The BIABacus reduces your grain bill if you increase the boil time because of the following:
1. An increased boil time means increased evaporation. (Evaporation during Boil)
2. Increased evaporation means you need more water to start with. (Evaporation during Boil)
3. Increased water means you can "clean" your grain better*. (Clean during Mash)
4. If you can clean your grain better, you need less grain to get the same result. (Clean during Mash)

And your washing example would be from more water per grain during the mash, for better extraction and mash efficiency. (Not the boil).

Email me with more detail Scotty . I've had a few re-reads and can't see where I stuffed up although I maybe have?

Sorry Pat. Your info is always excellent, but some things were a little unclear to my reading (what process produces which benefit). Unless I am looking at the process wrong, or misunderstood (after days of computer problems), and either of these is possible...