Frequently Asked Questions - Different Values
|Question: Why does ProMash give me different predicted gravity values for my All Grain recipe than a published recipe or other brewing software packages?|
|Answer: There are generally two reasons for the possible difference:
|Question: Why does ProMash give higher gravity estimates for extract recipes with steeped grain than some other brewing software packages available?|
|Answer: Usually this is due to the fact that ProMash will properly
account for the gravity contributions of steeped grains while many other
programs will not. When you steep grain, you are actually performing a
'mini-mash', which must be accounted for (as steeped grains contribute
gravity). Now, steeped grain will achieve much less efficiency than a
standard mash (about 30% as compared to a 70% average for full mashes),
and therefore contribute much less gravity than in a normal, full mash. When
formulating an extract recipe using steeped grain in ProMash, set the recipe
type to "Partial Mash" and the Efficiency to 30% or less (note
this does not effect the extract entries, which always yield 100% of their
gravity potential). For detailed help on this see the Tips and Tricks
section on Steeping Grain in ProMash by
We are aware of other brewing packages that will account for the gravity of the steeped grains by automatically setting grain yields low and not providing an option for you to set the yields differently. While this may be appropriate for a single recipe and a single style of brewing, recipes and brewing techniques will vary and this "automatic" reduction of gravity to account for steeped grains fails for many brewers. This may also be a cause of predicted gravity numbers not matching with ProMash. Check with your vendor to see if this is the method they use.
ProMash allows the brewer to set the extraction rates (through the efficiency rating) to match their own brewing techniques and style, not forcing an assumed rate on the brewer. We know you want complete control over your brewing process and your brewing software. We give you that control.
|Question: Why does ProMash produce different IBU estimates for my recipes than in printed books, magazines or other software programs?|
|Answer: The difference may be due to several factors:
Recommendations: As many brewers ask us for our recommendation as to which Hop Formula is best for them, here is our opinion (please note this is an opinion only):
Brewers performing Full Wort Boils: Tinseth
Brewers performing Concentrated Boils: Rager
|Question: Why does ProMash calculate my mash efficiency different than other brewing software packages available?|
|Answer: This is usually due to the fact that most other software
packages only take into account the Original And Final gravities in determining
what the mash efficiency was. This is fine in a perfect world, but assumes the
measured volume of the final gravity was identical to the batch size specified
in the recipe, which is rarely the case. For instance, if you boiled down 1/2
gallon further than anticipated, the gravity of that wort will be higher
(although the extract content will be the same). Entering that as the
final gravity for an efficiency determination would give you higher, incorrect
value as the gravity of the wort was higher, but the volume of wort was not
taken into account.
In order to determine efficiency properly, ProMash lets you specify the Wort Volume and Wort Gravity together, thus eliminating the 'perfect world' problems and allowing you to determine mash efficiency at any stage of the brewing process, from Pre-Boil to Post-Boil.
Additionally, if you take the gravity reading of wort in the fermenter, wort losses from the Kettle to the Fermenter must be taken into account, as those losses contain sugar and must be accounted for in the efficiency calculation. ProMash does this all automatically for you.
So, if you live in a perfect world, the method of OG-FG only efficiency calculations will match with ProMash (or very close...ProMash is also the only program to properly convert to extract weight for the determination, as pppg is not linear across SG ranges and some variance will occur because of this. Most other software programs assume the linear relationship). If you want an accurate measure of efficiency at any point of the brewing process, then ProMash is for you!