Beersmith boil off rate Hi, I hope someone can help me understand the boil of setting. In all cases, BeerSmith uses your preboil volume to total mash and sparge water. And in real world experience, I only see a difference in gravity gain from pre-boil to post-boil when my boil off rate changes, not when my pre-boil gravity changes. But then if you change the batch size from 5 gallons to 10 the boiloff goes up also. 0 now be a constant: "x gallons per hour" setting? The percentage per hour has always bugged me since boiloff rate is constant. 4 gallons in an hour and I run a fairly aggressive boil. With the new Beersmith, the boil off and evaporation are fixed. So if you change the boil time from 60 minutes to 90 minutes, it will calculate the boil off as 1. This doesn't Jul 27, 2020 · It inexplicably annoys me that BeerSmith, which is very good in most other respects, insists on specifying boil-off rate as a percentage per hour. Having a space to put post boil volume and actual trub loss would allow the program to easily calculate the actual values for boil off rate and grain absorption (assuming MT/LT losses are correct) for the user to use for updating their profiles readily. Yesterday, I literally boiled a gallon of water for an hour (started the timer as soon as boil was achieved), and then cooled it in cold water until it dropped to 70 degrees, then calculated how much was left Jul 6, 2012 · If you started with 54L pre-boil, boiled for 60 minutes and ended with 51L, that's only about a 5% per hour reduction rate which is pretty low. 2 liters versus projected 23. 5 times the 'hourly boil off rate'. 8 gallons. 75-6 gal to get my gravity then I'll lose another . My question is what a good starting point to enter into the beersmith mobile equipment profile. 5 smash today called for just over 5 gallons of water and after sparging and getting to boil at 3pm im still at just under 4 gallons at 6 o clock here. How much does it drop off? Nov 17, 2016 · BeerSmith will then calculate out the water needed for a full volume BIAB. This is Dec 24, 2018 · I consistently reach my pre-boil gravity readings but my original gravity has been a little low. It will probably need some adjustment after you brew to dial it in to your particular process, boil off rate, grain absorption, and process losses. If you boil off amount is 1 gallon per hour, you will boil off 4 gallons if you boil for 4 hours. But I would like to start the process of configuring the rate from some bases of knowledge. 72 gal Why isn't the 'end of boil vol' 5. Regardless of how much liquid is in there, the GPH boil off will be the same. They can probably give you an idea of what to expect for boil off rate and boil vigor as well as the functions of each element and expectations from them. I have also previously measured my kettle trub to 1L. Eric Jun 4, 2025 · Mastering boil-off rate calculations for different kettles represents a crucial step in brewing advancement from novice to expert practitioner. Since I like to use my BIAB bag as my hop bag, the bag frequently floats above any areas that are bubbling. Dec 17, 2018 · With the shrinkage rate set at 4%, I get the same estimated OG (16. So, if you got extra water from the mash and didn't boil off like the program thought, that would account for the extra volume. Below the spigot sits 1. Rule of thumb is that you loose a gallon an hour for a nice rolling boil. 04 gallons because that is what is called for based upon your equipment profile, grain bill, and target volume into the fermentor. 2 liters) of additional wort not accounted for in my water additions. Wanted to do a 2. Easiest way to get your systems boil off is to boil water for an hour. Since that water is boiled off over an hour it works out to a very modest 7. Don't fret too much over the boil off rate. 8% mash efficiency) expects the following; Pre boil gravity - 1. ) completely match the original. 50 gallons end of boil but to me you can’t even compare those 2 because from what I’ve been told Beersmith needs those other fields entered to calculate correctly. Does the boil-off rate accept negative values? Mar 5, 2017 · The most accurate way of correcting this is with your volumes and calculated boil off rate. Boil off shouldnt really have any effect though as the water from mash/sparge is too much not the wort into fermenter. Sep 6, 2022 · I changed the boil off rate from 1. So I've really been trying to figure out my boil off rate the best I can. The boil off rate is about . When the "Calculate Boil Automatically" is checked, BeerSmith adds your boil off rate to total mash and sparge water. If you happen to boil off too much, you can always add some water near the end of the boil to make up for it. May 27, 2011 10 gallon SS pot, Bayou Burner 6. Based on this data on a recent recipe, Beersmith (with 70% BH efficiency & 74. I mash in with 30 litres then sparge with enough water to account for the grain absorbsion. The evaporation rate is simply the post-boil volume minus the pre-boil volume divided by the pre-boil volume. I could just leave that water there when transferring to the mash tun and consider the evaporation a wash, but since my boil-off is typically 1 gallon I would have extra. 3 to 1. 063 Apr 20, 2015 · My boil off rate and grain absorption was pretty close to target; preboil volume was 24. Here is what I don't understand: My batch size is 5. Bring your runnings to near boil, turn off the heat, measure volume with whatever you use, bring it back up to the boil rate you typically use, wait one hour, turn off the heat, measure the difference and do the math. . I cannot change it. Beersmith is only calculating my boil off rate at half a gallon. So that is 1. Hi everyone, I just got my 110V Brewzilla 35L Gen 4 and was looking at Brewfather’s equipment profiles for this system. Sep 18, 2021 · You might want to write to Brewzilla directly with your specific concerns and questions. In the old Beersmith I could adjust my percentage. 5 gal Oct 31, 2017 · Hello again. 19 gallons/hour, but this seems high based on my research. Since you are electric and you can dial in exact power, find the power setting that gives you the minimum tolerable boil, and determine your hourly boil-off value. 79 lph respectively for hourly boil off rate. Use this experiment to calculate for beersmith. Remember that this will change with your elevation and how hard or soft you boil. 24 gallons? And then after it says to transfer to fermenter, it says to add water to achieve 5 gallons? Jul 26, 2012 · I switched my boil kettle from propane to electric and went ahead and purchased a steam condenser so I can brew indoors during winter. This was water only of course. After 60 minutes, turn off the burner, let the water cool and measure the volume remaining. 5 gal Boil time 60 min I set the boil off rate at 1 gal and I checked 'hourly boil off rate' End of boil Vol shows 5. I use my brew kettle as a HLT. How do you have your boil off set, is it a fixed amount or a percentage per hour? I will be introducing my new boil kettle to the flame tomorrow. This Jun 8, 2008 · The keggle is small for a 10 gallon batch by the time you account for boil off, hop absorption, and wanting 11 gallons for the fermentation. Changing boil off rate in beersmith but what else. Where do I go to select boil off as a fixed amount or hourly rate? Also, I find the boil-off percentage calculation in BeerSmith a little cumbersome. May 20, 2017 · So for example a 2 gal/hour (4 l/hour) boil off would produce 1600 times that volume in steam or 3,400 gallons (13,600 liters) of steam. In fact it drops off fairly rapidly with temperature. This make no sense and it means that I often have to tweak the percentage value in order to get the right gallons per hour You want to update this to reflect what you think your actual boil off will be and make sure you check the box to have BeerSmith use this as a hourly boil off rate, otherwise if you change the boil time for another recipe, it will not scale the boil off accordingly. ) and it uses those values to calculate the amount of water and grain needed. Shouldn't the boil-off volume be roughly the same if I were to do a 5-gallon batch as a 10-gallon batch? Wouldn't an "X Volume Per Hour" boil-off calculation make more sense? Mar 10, 2017 · It seems the higher my estimated pre-boil gravity, the bigger the gravity gain becomes for the estimated original gravity, even though my boil rate off doesn't change in the program. Doesn't Oct 29, 2015 · What would a average boil off rate be for making 5 gallon all grain batches? Thanks!! This page requires frames Click here to view the table of contents without frames Hi, Don't know if anyone knows the answer to this but would 30litres of water boil off the same amount as 60litres of water for 60 minutes? Hope that makes sense May 28, 2011 · I ran an experiment yesterday with my new equipment for all grain brewing. Boil off is based upon temp and surface area exposed to the air. Does anyone have any experience with this or suggestions? In your equipment profile, you will have a line for boil off (it's entered as a volume). One of the strengths of BeerSmith is to take a recipe which someone else has developed and scale it to match your equipment, batch size, and process. If you wind up with too much volume, boil a little longer. It sounds like you get less boil off. 5 litres. After 90 minutes, take a volume reading, volume is 6. 9 gallons? If you have customized your equipment profile to have the volumes of your losses (mash tun loss, boil off rate, trub) and set the grain absorption based upon your typical values The way BeerSmith, and most brewing software works, is that you tell it all your system parameters (grain absorption, boil off rate, losses at various steps, efficiency, etc. Dec 10, 2011 · For a typical 5 gallon batch, why does beersmith kick out a post boil volume of 6. 5 gal? Now I Feb 7, 2012 · After 60 minutes, take a volume reading, volume is 7 -1/4 gallons (rate works out to be 0. Understanding the relationship between kettle geometry, environmental factors, and evaporation rates enables consistent beer production and recipe accuracy. 5 gal to boil down to 5. Sep 10, 2010 · That's a perfectly OK method. 25 gals to 1. The only major difference is that in the whirlpool, the hops are at a lower temperature, so the isomerization process takes place at a much slower pace. If this is the same equipment your normally use, you can make a copy of your existing profile and then adjust the numbers for the target volume and boil off rate to match your anticipated batch size. Mar 2, 2009 · I have a question regarding boil off. I, too, have the 10-G Blichmann kettle and on average I boil-off about 1. I have been keeping track off the amount of water that i start the boil with and what goes into Oct 22, 2007 · 11% is my evap rate on our gas stove in the kitchen. I boiled 10 litres for 30 minutes and evaporated 2. 048 Post boil gravity - 1. Aug 6, 2011 · First thing, figure out your boil-off. With BeerSmith you enter a percentage for the boil off rate and that percentage of original wort volume is calculated to boil off each hour. The same basic relationships apply to the whirlpool. The only 4% I know in BeerSmith is the chilling percentage. I’m a bit confused as there is only one profile for the 35L gen 4 system. So I went ahead and ran a water test in the boil kettle to determine losses and boil off rate for my new equipment profile. With the new pot I'll be able to brew 15 gallons and still have a rolling boil and plenty of free space above the pot making a consistent steam cannon shooting up from the pot. Just remember that water expands when heated so take It would be more helpful to have the boil off rate as GPH or QPH instead of a percentage for those who do different sized batches using the same kettle. For a blank recipe with no ingredients, I would expect the total volume calculated to equal to batch size. 5 into primary and taking pretty much everything which I don't think is a bad thing Oct 4, 2020 · BeerSmith will calculate the boil volume for you when you input the information you just obtained into an equipment profile specifically for the small volume you are planning on brewing. Water volumes which may be stated in a recipe are valuable only if your process (boil off, trub losses, etc. Obviously, you must take the wort gravity into account when concentrating or diluting the wort during the boil, but once you have a few batches behind Your boil off rate will change the humidity too, high humidity lower boil off rate, low humidity higher boil off rate. The other thing I see is that your boil off rate seems high. Beersmith will need this. My equipment profile is set for a 1hr boil and a 1 gallon boil off rate. Is there a formula that takes preboil gravity, original gravity and time into consideration to arrive at a boil off rate? Aug 3, 2013 · Once boiling commences, start a timer. Sep 29, 2022 · The total water is showing 8. May 10, 2025 · In the equipment profile I set all of the losses to zero as well as the shrinkage rate and boil off rates to zero. I have changed the value in my equipment profile, but the calculations still increase the Then, where I had set up my, "Evaporation Rate (5-15%) to 33% I began to move that figure downward. 25 Gal / hour at most. If you check the box for 'use boil off as an hourly rate' the program will change the boil off based upon your boil time in the recipe. So in total the 218 grams of hops added to the boil kettle amounted to and additional whopping 200 ml (0. Why do you want to have the water total be 6. Subract the volume remaining from your 5 gallon starting volume and that is your one hour boil off rate. This has been entered in as well. Apr 3, 2011 · I have the stainless hood which I find reduces boil off down to about 3l per hour. 25 gal to shrinkage from cooling leaving me with 5. Dec 18, 2019 · Hop bitterness is a function of boil (or steep) time, amount of hops used, boil volume, boil gravity, and the alpha acid percentage of the hops. Enter the volume you would boil off in an hour, make sure the box labeled 'Use boil off as an hourly rate', and BeerSmith will calculate the boil off as a percentage for your recipes. Your boil temperature may not look as high as you expect, depending on where your probe is. This means you may need to either add more hops or increase your boil time when brewing at altitude to achieve the same bitterness level. I was wondering if anybody uses a 25 Gallon Mega Pot as a brew kettle Mar 16, 2013 · I will use the data provided by Anvil on the boil off rates for both the 120v and 240v profiles. Feb 7, 2017 · Bringing this into balance should not affect other recipes, as BeerSmith will use the grain absorption and boil off rates to adjust the amount of water in the mash and sparge based upon your grain bill and extraction efficiency. The stated boil-off rate is 1. 89 lph and 3. Does anyone know if the size your are boiling affects the amount per hour than boils off? In Beersmith you put in a percentage like 15% for the boiloff. What am I missing? Hey guys. Jan 29, 2017 · The boil off rate seems accurate but if i increase it for what i actually got of 2 gallons beersmith is going to add even more water. Since you already know the gravity point difference is only 75% of your current expected value, you can start by estimating the boil off rate is off by the same ratio. I have done a boil off experiment to confirm that my boil off rate is 3L per hour. The gravities alone do not determine the rate (though you might be able to back out the volumes from the gravity). 57 cubic feet/minute (206 l/min) flow rate which can be handled easily by even a small blower or fan in the vent. 875 gallons (rate works out to be 0. This is a 2BBL Blichmann commercial system, so 1/4 - 1/2 Gal boil off has no affect on gravity. As it is now, we have to recalculate the percentage based on Jun 23, 2011 · I am trying to adjust my boil off percentage under "Water Volumes", then under "Boil and Fermentaion". Look at the Vols tab or equipment profile and verify that the boil off rate default matches your actual results. It's important to measure the remaining volume cold, since your starting volume is also cold. Apr 15, 2015 · I just done the math to work out my boil off rate per hour for my boil kettle and it seems wrong to me because in all the brews i have done so far it has been less than what i got from the equation. 76 liters by BeerSmith. Anyone have any idea what is going on here? Aug 31, 2018 · Hello I have a question about boil-off rate’s in beersmith mobile. However, beer smith always shows half a gallon no matter what I do. I know each persons system is different but Like I am asking what’s a good middle of the road number to start off with? Feb 14, 2012 · Humidity and temperature can affect the boil-off rate. I've found being semi new brewer and using beersmith since last year that it took a couple batches to get my correct boil off rate. So if I boil off a gallon after the beer cools, im left almost a half gallon short on brew day. While it varies widely depending on kettle dimensions and a few other variables, an average boil-off rate of around 14% is commonly accepted at the home-brew level, which also happens to be about what it appears BeerSmith was telling you. I use a steam condenser on the boil kettle. Dec 17, 2016 · In your equipment profile, modify it to add 1 gallon of top off water pre-boil. This will subtract that gallon of water from the amount it calculates for the mash, and you can use that gallon to sparge with. For a normal gravity beer with my system I collect 7. Your high boil-off rate is most likely due to the burner being up just a bit too high. For example a 20 liter batch with zero losses and zero boil off should require 20 liters of water, that's not what I get though. I know there are a lot of variables in determining boil off rates. How do you keep your boil off rate consistent? How can you be sure you are not boiling more, or less, vigorously than expected? This seems to be especially difficult with my BIAB setup. I took my straight-sided 7 gal kettle and added 3 gals of water, boiled for an hour and measured. If I set the cooling shrinkage to 0, I get the exact measured OG I got on this batch (16. Continuing to adjust it will better tune it in to how you brew and make it pretty accurate. 75 gal/h). 75 gals and have "Use boil off as an hourly rate" and " Calculate boil volume Automatically" checked. Dec 8, 2019 · As the boil temperature is reduced, hop utilization also drops off. 40 gallons compared to beersmiths 348. Will the evaporation rate / boil off in Beersmith 2. to determine losses during boil-off and cooling in preparation for my first all-grain brewing sesskion scheduled for tomorrow. You will boil off the same amount the first hour as you do the 4th hour. 99 P), but the post-boil volume includes this "loss," contrary to the Equipment profile's calculated Post boil volume. I’m assuming this means my boil off rate is being input incorrectly into BeerSmith. Boil off rate is not determined by time. 3% less in promash (can’t change it that I could tell) end of boil in promash is at 353. 35 P) and the tool's post boil volume matches the equipment profile's one. I finally built a brew stand for my new Ss 10 gallon BME kettle, and this evening decided to test boil-off rates so I can set up a beersmith profile. Mar 23, 2012 · I realize the boil off is like 1. Lets do a 120minute boil, take volume reading, volume is 6-1/2 gallons (rate works out to be 0. So, somehow the previous hour of boiling is affecting the current hour of boiling. Not too vigorous, but a fairly good rolling boil. Each new figure provided me a new value in the, "Boil Off" setting that sits to the right of the, "Evaporation Rate (5-15%)" setting. I expected to see an increase in my recipes of sparge water or pre-boil volume but saw a decrease instead. gjab mew zskqafy qahixc vyis yttf crevo yze aidsqh mgjby ewswf hobjq ufrao zhplf hyd