On my last few brews, I have been hitting or exceeding my Pre-Boil Gravity, but have been coming up a few points short on the OG in my fermentor. I do 2.5 gallon BIAB batches and have an avg. mash efficiency of 80%, but my brewhouse efficiency is low at an avg. of 62%. Below is a little chart on my last three brews.
__________Pre-Boil Est.___Pre-Boil Act.___Pre-Boil Vol. Est.___Pre-Boil Vol. Act___OG Est.___OG Act.
Brew 1_______1.049________1.050__________3.57 gal___________3.80 gal_______1.059_____1.056
Brew 2_______1.049________1.049__________4.02 gal___________4.10 gal_______1.066_____1.061
Brew 3_______1.052________1.054__________3.72 gal___________3.80 gal_______1.065_____1.057
Any ideas on why I am not hitting the OG in my fermentor even though i am hitting my pre-boil gravity? I build my recipes in BeerSmith based on a Total Efficiency of 65%.
__________Pre-Boil Est.___Pre-Boil Act.___Pre-Boil Vol. Est.___Pre-Boil Vol. Act___OG Est.___OG Act.
Brew 1_______1.049________1.050__________3.57 gal___________3.80 gal_______1.059_____1.056
Brew 2_______1.049________1.049__________4.02 gal___________4.10 gal_______1.066_____1.061
Brew 3_______1.052________1.054__________3.72 gal___________3.80 gal_______1.065_____1.057
Any ideas on why I am not hitting the OG in my fermentor even though i am hitting my pre-boil gravity? I build my recipes in BeerSmith based on a Total Efficiency of 65%.