I have been working diligently on getting my brew system dialed into the right efficiency so I can be a more consistent brewer. I have measured the liquid that remains in all my transfer lines and counter flow chiller, etc.
The last 3 brews have been 5 gallon batches (5.5 gallons going into the fermenter and 5 gallons being kegged). Each of those brews came in at 65% total efficiency.
So, I figure I'm pretty damn close to 65%. I get a new recipe going for this weekend and set it up exactly the same as I did for the previous 3 batches.
This time though, I am doing an 11 gallon batch and splitting into 2 fermenters (5.5 gallons each). Using BeerSmith, I scaled the recipe and made sure I had 65% in as total brew house efficiency. You know, because that's what the last 3 batches came in at.
Brew day goes off with no problems. But, my total brew house efficinecy comes in at 80%. WTF!!
I had 65% on the last 3 brews, do everything the same and get 80% this time. This is really throwing off my OG and becoming frustrating. I should have been in the 1.057-1.060 range but came in at 1.070.
Should I be making adjustments between 5 gallon vs. 10 gallon batches? What else should I be doing that I am not?
Thanks for the insight!