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  1. TheBrewBag

    Efficiency, wort left behind, sparging (BIAB)

    Whether you sparge with held back volume and then squeeze, or don't sparge and squeeze, the kettle efficiency will be the same because conversion is finite. Sparge brewers leave wort volume in the tun, and because they don't squeeze, an additional 7-8 oz of wort in the grain. If that volume was...
  2. TheBrewBag

    Comparison of mash tun insulation methods

    I've been using furnace duct insulation - the tube style - laid flat and cut to measure then taped with aluminum around the kettle and a pillow cut out of the same material for the top. Draped with a moving blanket - no matter the ambient temp in my garage - the loss over 60 minutes is ~2º. This...
  3. TheBrewBag

    Crazy low efficiency

    Full volume mashing calculated correctly delivers a consistent 78.5% average. A buddy and i have tracked over 150 brews using this method and a fabric filter. He averaged 78.4 and I 78.5%. This indicates that every brewer is capable of the same results. The only variable in full volume mashing...
  4. TheBrewBag

    Thinking about going eBIAB system. Need some convicing :D

    You'll never regret having a larger kettle, but you may regret the smaller one. For full volume mashing you'll need a kettle at least 40% larger than the targeted fermenter volume, so 5 gallon batches require a 9 gallon kettle, 10 gallon = 16. You can max out a 15 gallon kettle doing a 10 gallon...
  5. TheBrewBag

    BIAB - Faster Conversion, Higher Fermentability?

    Either way time will increase conversion - but after 60 minutes the increase is negligible. The 2 variables most don't employ together when using a fabric filter is grinding at .020 and a WTGR of 2.6 or greater. This creates the optimum conditions for a more complete conversion in less time.
  6. TheBrewBag

    BIAB - Faster Conversion, Higher Fermentability?

    Bear in mind that BIAB is simply employing the use of a filter, which allows a finer grind to optimize the grain potential. The following ExBeeriment from Brulosopher points to a more fermentable wort. http://brulosophy.com/2015/11/23/mind-the-gap-course-vs-fine-crush-exbeeriment-results/ Water...
  7. TheBrewBag

    Trub question

    There is never too much trub - unless it is full of hops, then the degradation could impact the final product. If the trub is simply fats and proteins it has no impact.
  8. TheBrewBag

    Post boil gravity too high

    add water if you want - sterile of course - or leave it alone. The difference is either pre-boil water calcs were off or your boil off rate is higher than you think. You don't mention the final volume but picking up 20 points post boil is a lot. Hydrometer might be off as well.
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