Brewer's Friend Home Brewing Software

Making Sense of Efficiency Definitions

When using brewing calculators like Brewer’s Friend brewers are inadvertently confronted with the concept of efficiency. While efficiency is an important tool in making the brewing process more predictable, there exists a lot of confusion around various definitions for efficiency. Let me clear up most of them.

In brewing, just like in any other field, efficiency is the ratio between output and input. This is where all efficiency formulas have to agree. The disagreement tends to lie in what is considered the input and what is the output.

Efficiency in brewing cares about soluble extract in wort, commonly referred to as sugars, even though what’s dissolved is more than just sugars. The amount of extract is determined by both the volume and gravity (extract content) of the wort. Gravity point based calculations express this extract as the product of gravity points (1000*(sg-1)) and wort volume in gallon. The volume and specific gravity need to be corrected to a standard temperature (generally 68 F / 20 C) and the result is simply referred to as points:

points in wort = 1000*(sg-1) * volume in gallon

In metric calculations the extract content can be calculated slightly more accurately by multiplying the wort volume with its specific gravity and extract content in Plato (see blog post about the relation between specific gravity and Plato). Since Plato is a percent number the result has to be divided by 100.

extract weight in kg = wort volume in liters * sg * Plato / 100

1 kg extract is worth about 100 points.

The input side of the efficiency calculation is commonly the extract potential of the grist. Extract potential is a key malt analysis parameter which is tested and reported for each batch of malt. The maltster’s lab grinds a malt sample very fine and uses a congress mass (special mashing schedule that is used by convention) to extract the malt’s soluble extract. That dissolved extract is then measured and reported as weight percent of the malt’s dry weight. The resulting number is referred to as DBFG, dry basis fine grind. Batch to batch variability tends to be low and working with default values for various grain types works just fine.

When determining the extract potential for a given grist we need to multiply the grist weight with the average extract potential in points or percent. The latter is the DBFG number multiplied by (1-MC/100) where MC is the moisture content of the grain. Considering the moisture content (generally around 4%) is important since it does lead to an inaccuracy of a few percentage points. In gravity point based calculations extract potential is expressed as points per pound per gallon (pppg or sometimes called ppg). An ingredient with an extract potential of 100% (table sugar, for example) has 46 pppg. This number can be determined through a thought experiment that dissolves sugar in water and calculates the resulting gravity and volume. Note that the volume, which matters, is not the volume of the water but the volume of the sugar solution.

Now that we established the input and output side of efficiency let’s look at different efficiency definitions:

Efficiency into the kettle or mash efficiency (Palmer) is the ratio between extract in the kettle at start of the boil and extract potential of the grist. This is the most useful efficiency definition for all grain brewers since it considers losses during mash conversion and lautering. Since no (significant) extract is lost between the beginning and the end of the boil it can be calculated with kettle full volume and pre-boil gravity or cast-out volume and post boil gravity.

Conversion efficiency has been introduced to asses the performance of mash conversion before lauter losses take effect. Since it is difficult to measure the volume of wort in the mash, this efficiency is best assessed by calculating the highest possible mash wort gravity based on grist extract potential and mash water amount and then comparing the actual mash gravity to it. The mash gravity test for conversion efficiency allows brewers to troubleshoot low efficiency by determining if significant efficiency is lost during the mashing step.

Lauter efficiency builds on the fact that efficiency into the kettle is the product of conversion and lauter efficiency. It can be calculated if both conversion efficiency and efficiency into the kettle are known. Lauter efficiency only counts losses due to dissolved extract being held back in the grain. i.e. it is the percentage of extract dissolved during mashing that was transferred into the kettle. To avoid oversparging and resulting negative beer quality effects, lauter efficiency in home brewing should be kept below 90%.

Efficiency into the fermenter is calculated using the wort volume collected in the fermenter. It is lower than the efficiency into the kettle due to wort losses in the hop trub. Many brewers rely on this efficiency for planning.

The definition for Brewhouse efficiency in literature and practice is rather ambiguous. Some brewers define it using cast-out gravity and cast-out kettle volume while others consider the volume collected in the fermenter. Brewer’s Friend notion of brewhouse efficiency is based on batch size in the fermeter.

This diagram illustrates where extract (i.e. efficiency) is lost starting with the grain and ending with the dissolved extract in the fermenter.

As a side note, German brewers generally consider the total grist weight as the input for their efficiency calculations. As a result the reported efficiencies tend to be much lower since in that calculation a ~80% number (the extract potential of the grain) represents the maxim.

More technical detail on efficiency calculations can be found in this article: Understanding Efficiency.

For details on how Brewer’s Friend calculates efficiency, see the following FAQs:
How is efficiency calculated in a Brew Session?
How is efficiency defined on the recipe editor?

Post by Kaiser

Posted in Brewing | 6 Comments »

Detailed Guide for Cleaning a Better Bottle

A while back I posted about my Better Bottle blowoff setup. During my search for a good blowoff arrangement, I ended up calling the manufacturer of Better Bottles (BBs). The man I spoke with was super helpful and knowledgeable.

During that conversation, I decided to ask him about cleaning. The main reason I brought up cleaning was that I commonly have a 1-1.5 inch line of fermentation “gunk” that forms at the top of the BB right before it begins to taper to the neck. This line forms on the top band of the BB. Since I often leave my beer in the primary for 3 weeks, that gunk can get pretty stuck on there. Also, the bands on the BB are textured, and the texture makes gunk stubbornly adhere sometimes.

My primary cleaner is OxyClean, so with that in mind here’s the information he shared with me a few years ago. I’ll then share my cleaning regimen, modified after my conversation with the BB company plus a newer step for the most stubborn of stubborn gunk!

Better Bottle cleaning advice direct from the company:

1. The BB Guy said OxyClean can be used, but you’ve got to be careful – it’s powerful stuff. Don’t pour the powder directly in on the plastic. First put in the Oxy in water to dissolve it, when pour it in. Ensure that any Oxy concentration rate is low – read the package. I actually make mine a lower concentration than the “general cleaning” amount on the box…it cleans up my BBs fine. What I do is put my Oxy in a bit of warm water, dissolve it and pour it in the BB and swiftly fill it up to my desired level. The BB Guy explained that the reason you want to be careful with Oxy is that high concentrations of Oxy over a period of time may weaken the bottle. He also didn’t recommend soaking in Oxy for more and a few hours at the most…not overnight.
2. BB Guy cautioned about using super hot water – don’t do it. It won’t melt the bottle, but over time it can weaken it. He said to use water you can comfortably put your hand in. I’m typically a “blazing hot” water washer type, so I backed off.
3. BB Guy had a great suggestion about getting that fermentation gunk off: put a soft washcloth into the bottle with some water. Swish it around and the washcloth will pull the gunk off.

Here’s my BB cleaning regimen along with some photos:

First, let’s start with a dirty carboy I just racked from – this is with NO rinsing of any kind, just poured out the remaining liquid after racking to my keg:

Check out all that gunk on the textured band and all the way up to the neck of the carboy – this is from WLP002, a big top cropper!

Detailed cleaning steps:

1. I rinse them out with warm water and leave some warm water in there (about .5 gallon).
2. I put my orange carboy cap on top and shake the heck outta the bottle. This “water scrub” takes off a good portion of the gunk. Here’s what’s left after that vigorous shake – loads better, but not clean:
3. I put in a small squirt of Ivory liquid dish soap and put about 1.5 gallons very warm water in. I replace the carboy cap, and invert the carboy on a bucket with a hand towel on the lip. The towel keeps the BB from sliding into the bucket. I’ll let it soak for a while…sometimes a day. I used to do this with Oxy, but after my conversation with the BB guy I made switch to Ivory soap as change to my process.
4. I dump out the soapy water and rinse out the BB. I inspect it carefully to see if there’s some gunk still present. About 60% of the time, there are some scattered gunk spots left.
5. If there’s remaining gunk, I do the Oxy soak. I invert the BB like step #3 above and leave it for an hour or two only to reduce chemical stress on the BB per the company.
6. Still remaining gunk? If yes, then I pour out most of the Oxy water and leave about .25 to .5 gallon in the BB. I put my washcloth in there and swirl it around. Most of the time the BB is inverted/partially inverted with carboy cap on top and I’m spinning it around. It works well, and most of the time my BBs are clean at this step. Here’s the amount of water and my designated cotton BB washrag:
7. Gunk not gone yet? Often, this is with wheat beers and aggressive top croppers. That’s when I pull out the heavy artillery – the Carboy Cleaner. I had some anxiety about using these…would they scratch the plastic? The BB Guy said not to use brushes for this very reason. I wrote the Carboy Cleaner company and got a prompt response – yes other people use them for BB’s. No there are no surfaces on the cleaning arms that could scratch the plastic. I decided to give them a try. They work great! I use OxyClean water and a few passes takes care of it. However, I am cautious and don’t want to invite trouble and that’s why I use them as the last resort/ Typically that’s about 20% of the time. Before each Carboy Cleaner use on a BB, I check the cleaning arms carefully. I check the edges to ensure the plastic inside the arm that provides the necessary rigidity isn’t peeking out and I check the stitching to ensure the plastic “thread” isn’t coming unstitched. I’ve had the same Carboy Cleaner pads for 2 years now, and haven’t yet had to switch to the extra, replacement pair that came with them. One other thing to mention – if you decide to purchase a Carboy Cleaner for BB’s, tell them you use BBs when you purchase. He sent me the appropriate drilled stopper to work with BB’s! Great service. By the way, I have NEVER had a BB that couldn’t get 100% gunk free after this step.
8. Rinse and let air dry. The BB Guy said to dry them on their sides…it will go faster. I tried it and found that I agree. Shake as much water out as you can and set it on its side. More water will pool at the bottom. Keep shaking it out and in a day or two it will be dry. In this specific BB cleaning case, it was clean by Step 6 – here’s the final product – all clear!
9. I put a piece of clingwrap on top of the opening to keep dust from getting in BBs during storage.

So that’s my Better Bottle cleaning regimen. With the addition of the Carboy Cleaner on the most stubborn fermentation remnants, I’m now confident that I can safely clean BBs no matter the gunkage!

Post by Brewer kcpup

Posted in Equipment | 3 Comments »

Yeast Pitch Rates Explained

To make high quality beer consistently, understanding your yeast pitching rate is important. In fact, this may be the key to taking your beer to the next level. It turns out that liquid yeast manufacturers give you barely enough to get by, which we explain in detail below. The yeast pitching rate describes how much yeast is going into the fermentor, per gravity unit. The standard rate is expressed as million cells / milliliter of wort / degree plato. Higher gravity beers and lagers call for a higher pitch rate. If the pitch rate is too low the yeast get stressed and produce undesirable byproducts, including soapy, chemical, and corn flavors (yuck!). Stressed yeast can even stall out, resulting in an incomplete fermentation (half way between beer and wort – not good).

Our yeast pitching calculator makes choosing and hitting your desired pitch rate very simple.

What is the impact of the yeast pitch rate on the beer?
A higher pitch rate leads to cleaner flavor profile because the yeast are reproducing less. A lower pitch rate can bring out more flavor from the yeast, but can also lead to inconsistency batch to batch.

What is the standard pitch rate?
A popular study done by George Fix concluded a rate of 0.75 million cells / ml / degree Plato is appropriate for ales, and double that for lagers. Other popular brewing tools use this number, though some opt for 1.0 instead of 0.75.

Lagers require about twice the pitch rate of ales, since they ferment at lower temperatures.

Pro brewers pitch at a higher rate to mitigate risk of infection, ferment quickly, and ensure a consistent product. Serious home brewers who want to get excellent beer pitch at higher rates too.

Our analysis indicates that at present, the liquid yeast manufacturers like White Labs and Wyeast give home brewers just barely enough yeast cells to get by for a typical batch of Ale. They say one pack or vial is enough for 5 gallons of wort at 1.060 and contains approximately 100 billion cells. This comes out to a pitch rate of 0.35 million cells per milliliter per degree plato. This is half the rate of what pro brewer’s use.

Why the low pitch rate from the manufacturers?
In their defense, the product does contain extremely healthy first generation yeast. One justification might be that the 0.75 rate really applies to pro brewers – who repitch. That re-pitched yeast contains some trub, dead yeast, and other junk, so the 0.75 rate is not as pure as the 0.35 manufacturer’s rate. Repithched yeast can’t be 50% gunk, probably closer to just 10% after washing.

To make matters worse with liquid yeast for home brewers, the overall viability drops as time passes. Liquid yeast viability drops 21% each month, or 0.7% each day, from the date of manufacture. So in about 5 months, that pack is pretty much dead. I only buy yeast manufactured in the last 4 weeks at my local home brew store, and I use it as soon as possible. Lesson here: only use the freshest liquid yeast, and get ready to learn how to make yeast starters if you want to use liquid yeast…

What pitch rate makes sense for the home brewer?

We asked a gold medal winning brewer and home brew store owner about this. He says he would never pitch at a rate of 0.35, and makes a starter for anything above 1.040 for a 5 gallon batch. We are convinced as well, though we realize making starters is not always an option for everybody. In our yeast pitch and starter calculator, we left it open so you can choose, or at least see what the manufacturers recommend vs the pros.

Overview of yeast pitching rates:

• New smack pack, MFG guideline: 0.35 (ale only)
• Middle of the road Pro Brewer 0.75 (ales below 1.060)
• Pro Brewer 1.00 (gravity above 1.060)
• Pro Brewer 1.50 (minimum for lager)
• Pro Brewer 2.0 (maximum, lager above 1.060)

Ways of achieving a higher yeast pitching rate:

A) Spend more money on fresh yeast (liquid or dry).

B) Make an appropriately sized starter – our yeast calculator handles that.  With dry yeast it is cost effective to buy more packs rather than make starters.

C) Re-pitch slurry from a previous batch. This should only be done under ideal circumstances (healthy fermentation, within 7-10 days, correct temperature range, beer below 6.5% ABV etc).

We have an introductory article on that subject here:
https://www.brewersfriend.com/2010/01/30/yeast-washing-101/

This Wyeast article has excellent and detailed on harvesting and re-pitching yeast:
https://www.wyeastlab.com/com-yeast-harvest.cfm

Ramblings on Yeast Pitching:

If a brewer tells you they pitched X number of yeast cells, that is just part of the story. What you really want to know is the pitch rate in million cells / milliliter of wort / degree Plato. Total yeast cells pitched only matters after you know the volume of the wort AND its gravity. Reason being – it takes more yeast to work through a higher gravity beer. You might also ask what generation the yeast were, what the slurry density was, and at what temperature the yeast were cultivated at.

Post by Larry

Other Brewer’s Friend Articles on the Subject:

We revisited our earlier articles on yeast starters and re-pitching to align with the information presented here:

• How To Make a Yeast Starter (OG 1.040)
• Stir Plates and Growing Brewing Yeast Quickly
• StirStarter Equipment Review

References:

• https://www.byo.com/component/resource/article/1749-yeast-pitching-rates-advance-homebrewing
• https://www.mrmalty.com/pitching.php
• https://www.wyeastlab.com/hb_pitchrates.cfm
• https://www.whitelabs.com/beer/homebrew_information.html
• https://www.calferm.org/edu/yeast/YEASTP.htm
• https://www.northernbrewer.com/documentation/YeastPitchingRates.pdf

Posted in Yeast Cultures | 2 Comments »

On the relationship between Plato and specific gravity

One of the most important measurements in brewing is the “sugar” content of wort and, later, beer. Sugar is in parenthesis because what is dissolved in wort is more than just sugar. It’s various sugars, proteins, lipids, minerals and trace elements. The professional brewing world refers to this collection of compounds as extract.

There is a strong and very predictable relationship between extract content of wort and its specific gravity. Because of this relationship we brewers can use hydrometers to measure wort extract content. Around the 1900s Karl Balling, Adolf Brix and then Friz Plato established a correlation between the density (specific gravity) and the sugar content of pure sugar. Each measured with more precision that the predecessor.

To make high precision specific gravity measurements, a device called the pyknometer is used. The volume of liquid held in a pyknometer is known at a very high precision and by weighing it empty and with the liquid to be tested, the density of the liquid can be determine very accurately.

The results of these measurements are available in tables in which the density for various sugar concentrations, expressed as weight percentage of sugar, is given. This relationship is only true for a given standard temperature. These sugar weight percentages are also referred to as degree Balling, degree Brix or degree Plato (°P). Essentially they are all the same. Degree Balling is rarely used anymore, degree Brix has been adopted by the wine industry (hence its use in refractometers) and Plato is used by the brewing industry.

Brewers, especially home brewers, commonly use specific gravity (1.xxx) or gravity points to express extract content without first converting to Plato. This is possible since the relationship between sugar content and specific gravity is reasonably linear. It’s also worth noting that the mix of compounds dissolved in wort doesn’t change the specific gravity exactly as pure sugar does. But this is ignored by convention. I.e. a wort with specific gravity X is assumed to have the same extract content as a pure sugar solution with the same specific gravity. In practice there is not much of a difference anyway.

To convert specific gravity to degree Plato the ASBC (American Society of Brewing Chemists) published a polynom that fits the data published in Plato’s tables (1):

A quick and dirty conversion between specific gravity and Plato is Plato = gravity points / 4. This formula works well up to a specific gravity of 1.060 where the error approaches 2%.

The relationship between specific gravity (density) and extract content (Plato) can also be used to calculate the volume increase caused by the dissolved extract. Many brewers don’t know that the volume of wort they produce is actually larger than the volume of water that is added. This is because the sugar increases the total volume of the solution.

Let’s assume 1 liter of water and dissolve 150 g of extract. The resulting wort has 0.15 / (1.00 + 0.15) = 13.04 Plato since Plato is the extract weight as percentage of the combined extract and water weight. A 13.04 Plato wort has a density (specific gravity) of 1.0527. Thus the 1.15 kg wort has a volume of 1.15 / 1.0527 = 1.092 l. This is 0.092 l more than the initial water. In general, each kg of dissolved extract increased the volume by about 0.61 l (0.3 qt for each pound)

This volume increase doesn’t matter much for general brewing calculations. When calculating the amount of water needed this effect leads to lower than actual grain absorption. A case where it does matter is calculating the efficiency of no-sparge or batch sparge lauter efficiency since that is determined by the ratio of the volume collected in the kettle over total volume in the mash.

Most tools, including Brewer’s Friend roll the volume increase from the sugar into the grain absorption factor (so even though it is happening, you don’t have to worry about it).

(1) A.J. DeLange: Specific Gravity Measurement Methods and Applications in Brewing

The following image shows the same hydrometer with the SG (specific gravity) and Brix/Plato scales:

For more articles on the subject of hydrometers:

Hydrometers readings are temperature dependent. All hydrometers are calibrated to a certain temperature – typically (59° F / 15° C) or (68° F / 20° C).  Use this calculator to adjust:
https://www.brewersfriend.com/hydrometer-temp/

Hydrometers are sometimes incorrectly calibrated at the factory, see our article on how to test yours:
https://www.brewersfriend.com/2010/12/19/instrument-calibration-for-maximum-brewing-awesomeness/

Post by Kaiser

Brewer’s Friend would like to welcome Kai of Braukaiser.com as a guest blogger and technical advisor! We’d also like to say thank you to him for his recent input on our October 2012 release, which included Plato support!

Posted in Brewing | 3 Comments »

October Release Is Live – Plato, Efficiency, and Batch Size Upgrades

The October release at Brewer’s Friend is live!  This release targets serious brewers who want accuracy, ease of use, and more rigor in the definition of their recipes and brewing process. We hope you will enjoy tapping into Plato support on the recipe editor, four types of efficiency available in the brew session, and the ability to designate an all grain batch size as ‘to the fermentor’, or ‘to the kettle’.

Brewing in Plato:

Plato is a sugar extract scale commonly used by pro brewers. It also happens to fit very well with metric brewing.  Many breweries choose to list degrees Plato on their beers instead of specific gravity. Now you can work in Plato too!  Look for the option under the More… button on the recipe editor.

By toggling the Sugar Scale option, the recipe automatically converts OG and FG between SG and °P. Specific gravity is still the default, but it can be changed under your brewing profile.  Brew log entries may also be entered in Plato.

See more in the FAQ about Plato support.

Efficiency:

When someone says they got 85% efficiency, that doesn’t mean much to me.  What kind of efficiency and is it reliable?  There are actually four types of efficiency, and Brewer’s Friend calculates each of them:

• Conversion Efficiency – what percentage of sugar was extracted from the grain in the mash.
• Pre-Boil Efficiency – what percentage of sugar made it into the kettle.
• Ending Kettle Efficiency – what percentage of sugar was present at the end of the boil.
• Brew House Efficiency – what percentage of sugar made it into the fermentor.

This release adds new Brew Log event types for tracking each of these inside a Brew Session.

We have lot more to say about efficiency, but it is too much for this post. Please check our FAQs:

• How is efficiency defined on the recipe editor?
• How is efficiency calculated in a Brew Session?

Batch Size:

Like the term efficiency, ‘batch size’ is also ambiguous. Up until this release, batch size meant how much wort is going into the fermentor for all recipe types.  That still makes sense for Extract and Partial Mash recipes, which involve topping off the fermentor with water to hit target volume.  This release does not change how Extract or Partial Mash recipes work.

All Grain and BAIB recipes now have a setting to change the ‘batch size target’ to ‘kettle’.  Ending kettle volume becomes the batch size in that case.   This improves recipe portability because it eliminates variation from trub losses and hops absorption.

There is a twist with supporting multiple batch size targets: since a different volume is being targeted at a different point in the brewing process a different efficiency value needs to be used. When batch size target is set to ‘kettle’, the recipe switches itself to use kettle/lauter efficiency.

All existing recipes have been defaulted to batch size target of ‘fermentor’, and use ‘brew house efficiency’.

The view recipe page indicates which type of batch size and efficiency is being targeted. The water calculation inside the Brew feature is aware of the batch size target and will adjust automatically. The batch size target default is still ‘fermentor’ but you can change that in your profile.

See more in the FAQ about changing the batch size target.

Other upgrades:

• Recipe view page shows total weight of all fermentables for a recipe.
• Hops AA limit increased to 100 to support hop extract.
• Stand alone hydrometer calculator remembers your calibration with a browser cookie.
• All stand alone calculators updated to look better and support metric units!
• Fix to water chemistry calculator – chalk ppm contribution corrected to account for portion that is non-soluble.
• Brew Session’s Mash Calculator section has a new FAQ.
• Brew Session’s Mash Calculator Infuse tab supports lowering temperature with cold water (but not ice).

We’ll follow up with additional blog posts about Plato and efficiency. We also have a spec done for our upcoming yeast calculator!

Post by Larry

Posted in Announcements | 1 Comment »

Draft Beer At Home – Keezer Build With Collar

Close your eyes and imagine your personal in home bar, complete with a draft system, stocked full of home brew!…. Congratulations! You are thinking of a Keezer! Here’s how to build one:

What the heck is a keezer?  Very simply, a keezer is a chest freezer that has been converted into the ultimate refrigerated beer serving chamber!  Keg + Freezer = Keezer.

Why does it have to be “converted”? Chest freezers often lack the height inside to comfortably accommodate 5 gallon cornelius kegs and the associated draft plumbing. There is a hump inside for the compressor that eats up a good amount of floor space. Even more important to note is that these freezers have extensive plumbing running through the walls of the appliance. Do you REALLY want to drill through the wall of a freezer to install a shank and hope that you do not ruin your freezer? Probably not.

The basic process for building your Keezer is to install a wooden collar on top of the keezer (below the lid). That extends the Keezer’s internal height, allowing it to hold more corny kegs, and providing a place for all the taps to go.

This project is fairly easy to accomplish and requires few materials to complete. In one afternoon, you can easily convert an old chest freezer into a keezer, which will reliably cool and serve your homebrew for years to come.

What you will need:

• Tape measure (measure twice, cut once!)
• Circular saw (to cut your lumber to length)
• Lumber (this will vary on the height of the collar you wish to build, 2” x 6” is a good start)
• Power drill (for drilling pilot holes, shank holes and installing screws)
• Wood screws (for building the keezer collar)
• Construction adhesive (to seal the gap between the wooden collar and freezer lid, as well as attach the freezer lid gasket to the keezer collar)
• Hole saw (for drilling holes in collar for the shanks)
• If you don’t already  have one, a temperature controller for your freezer chest to keep the beer at serving temperature (as opposed to freezing it).
• We highly recommend getting a moisture absorption product for placement inside your keezer to avoid condensation and eventual mold build up.

Steps:
#1. Remove the lid from your freezer, this will make measuring and fitting the collar that you are about to build, much easier. You will also want to REMOVE the hinges from the lid, as soon they will be mounted to the collar, allowing the lid and collar to swing up and out of your way when you open the keezer.

#2. Remove the rubber gasket that seals the lid to the freezer when the lid is closed. You will not need it on the lid after building the collar, and you will want to use this on the base of the collar, or the ledge of the freezer, to properly seal the collar to the freezer when it is fully assembled.
You’ll want to re-use the gasket from the lid. Be sure to use the measurements of the gasket (perimeter) to determine the size of your collar (perimeter). This will assure that you can reuse the gasket, and assure that you will have a collar that is capable of providing a proper seal. In essence, build your collar so that the dimensions match that of the gasket you previously removed from the lid.

#3. Be sure to measure properly and take into consideration blade kerf when cutting your lumber to length. For a nice clean build, be sure to cut your (4) sides (8 ends) using 45 degree angles so that you have no end grain showing when the build is complete.

#4. Secure all four sides of your keezer collar by drilling pilot holes and installing two wood screws in each corner. For added strength, you can also opt to add corner gussets to strengthen the structure. Keep in mind that soon you will be attaching this collar directly to the underside of the freezer lid that you removed in Step #1 which will provide some inherent structural stability.

At this time, you can utilize a hole saw to drill the holes that will accommodate the shanks for your taps. This can also be reserved for later. You can also sand, stain, laquer or otherwise prepare and preserve the wooden collar. This will not only protect the wood, but it can also add an aesthetic dimension to the keezer as well.

#5. You must secure the collar to the underside of the lid of the freezer. This can be done with a combination of “L” brackets and construction adhesive. Both will provide excellent holding power, but the combination of the two will provide positive holding power as well as the ability to seal the area where the collar meets the lid with an air tight seal.

#6. Install the gasket that was removed from the lid in Step #2 to the bottom edge of the collar, or the ledge of the freezer. This can be accomplished with the use of a good construction adhesive.

#7. Finally, you will want to mount the hinges that you removed from the freezer/freezer lid, to the collar itself. This will now allow the collar (and taps) to swing up and out of the way when you open the keezer for routine maintenance and cleaning.

This post was originally written by The Pol from HBT (one of the Brewer’s Friend authors) way back in 2009! We were cleaning out the archive and realized it had not been published. Doh!  The same facts hold true today about Keezers as they did in 2009.

Hope you enjoyed the article and are inspired to keg at home and build yourself one.

Posted in Equipment, Kegging and CO2 | 4 Comments »

Printable BIAB Checklist Launched

One of our fellow brewers wrote in awhile ago asking for a printable Brew In A Bag (BIAB) checklist, similar to the current All Grain Printable Checklist, but tailored to BIAB.

Here it is:

BIAB Brew Day Checklist – Printable list of steps for brewing using the BIAB method.

For more information on what BIAB is all about:

• Brew In A Bag (BIAB) All Grain Brewing Method
• BIAB Custom Bags You Can Order, and Example DIY False Bottom

Posted in Announcements | No Comments »

Removable and Reusable Labels for Home Brew Bottles

The other day I realized, my home brew bottles are naked! They don’t have fancy labels like all those commercial beers do… I hope they don’t feel embarrassed when I take them to a friend’s house. I’m lazy and just write one or two identifying letters on the cap with a sharpie. H = Hefe, PA = Pale Ale, S = stout, etc… It’s ghetto but it works.

Why I don’t normally label:

A) Labels take time to make.

B) Since I re-use my bottles, that means eventually having to peel off the label. With a standard label, that requires warm water, soap, a scrubber, and some elbow grease. What a pain!

The solution I would need for it to make sense to label my home brew more often:

A good looking label that goes on and stays on, but then easily peels off and can be reused multiple times. Here comes BeerClings to the rescue! The owner of Beer Clings contacted us about their product and sent us a free sample to play with. Pretty neat idea, and it really makes that naked home brew bottle look ready for a night on the town. The label stays on great – even weeks later! It peels off easy, and goes back onto the original sheet with out a problem.

The makers of the Beer Cling are well aware they need to come out with lots more templates, and allow brewers design their own logos.

There are two aspects to labeling:

One is the aesthetic component. Home brewers are proud of their beer (at least the good batches). Decorating the bottle with a label is a nice touch. We’ve tested doing wax seals on the caps, that is fun but a bit of work. BeerClings helps to address this, and once they get more patterns to choose from, for only $5 per sheet, I think they will be in a great niche.

The second component to labeling is record keeping. Knowing what is in the bottle is good. Especially if you are taking it to a club and passing it around.  Knowing the IBU, SRM, ABV, OG/FG, style, and who brewed it is even better! This goes for Kegging beer too! I use post it notes to keep track of which keg is which, again the bare minimum. It would be nice to have the ABV and IBU on a label posted right on the keg (or by the tap).

How we are going to support labeling:

Here at Brewer’s Friend, we are looking into supporting label making in some fashion. There is a thread in the forum going on about labeling. There are several links in there and ideas from fellow brewers on how they label their bottles.

At the very least, the recipe editor should have a button to generate text from the recipe that can be copied and pasted into Word or Open Office. It would be nice to include the recipe name, style, and stats like IBU, SRM, ABV, etc.  I just ordered a set of Avery removable labels to play with. That would be best of both worlds – the ability to print whatever you want on the label, and the ability to remove it easily when the bottle is empty.

One last thing I thought was cool, BeerClings also makes these wooden prohibition style crates (I want one):

Post by Brewer Larry

Posted in Equipment, Fun | 2 Comments »

September 2012 Release is Live

We just launched a bunch of features!  We are proud to say that many of the updates in this release came directly from topics in the feature request forum.  In addition, we made a nice improvement to the brew feature so it reports Pre-Boil Efficiency in addition to Brew House Efficiency.  We also made some major headway towards our first mobile release and group brewing feature (not ready yet). We also did some bug fixes and back end work to keep the system running smoothly.

Recipe Editor:

• Ability to add grains in pounds or ounces (or Kg/g for Metric recipes). Ability to add hops in ounces or grams, regardless of units.  Click on the units label with the little triangle, it works like a drop down box. [Forum thread]
• Under the “More…” button, each stat / equation now has a visual ‘matches style’ indicator. An exclamation point is displayed if the value is out of range, or a green checkbox appears if it matches. [Forum thread]
• Ability to set default hop type under your profile. Saves time if you typically use pellets.

Brew Sessions

• Pre-Boil Efficiency measure introduced (read more about that below).
• Default sort on my brew sessions page set to a more sensible default, and ability to hide completed batches. [Forum thread]
• The brew log entry screen now anticipates the next type of log entry.

Yeast List

• Corrected Wyeast NB NeoBritannia 1945, had wrong number.
• Added the new Danstar BRY-97 yeast. Larry will be using this in his Snifter Grade IIPA (experimental) batch as soon as it comes to the home brew store!

Thoughts on Efficiency:

We have been doing a lot of research on the meaning of efficiency in brewing. Deep thinking, the kind that keeps you up at night. The kind that that gives you dreams like flying on kettle lids through skies filled with clouds of steaming wort, swimming in a giant sized mashed tun, and coding equations from inside a grain husk.

Brewer’s Friend uses Brew House Efficiency (as defined here) in the recipe editor. This can be thought of as ‘to the fermentor’ efficiency. All losses that do not make it into the fermentor are counted against this measure. This is good because it provides a realistic picture of your entire system’s performance, which is what you need to know to brew repeatable batches!  If your friend tells you they get 85% efficiency – ask them which type of efficiency.  That is probably their conversion efficiency or their lauter efficiency, but not their efficiency to the fermentor.  Repeatable efficiency is what really matters. Please be aware that recipes with more hops than normal will cause greater hops absorption losses, thus lowering Brew House Efficiency by ~1%.

As part of this release, we have just introduced a new efficiency measure: ‘Pre-Boil Efficiency’ – the percentage of total available sugars that made it into the kettle.  It can also be thought of as lauter efficiency. Volume losses from mash tun dead space and grain absorption count against this measure.   Those of you who have been diligently making ‘Pre-Boil Gravity’ log entries will automatically see this figure computed on your existing brew sessions.  This number is generally 8-10% higher than Brew House Efficiency, since it does not count trub losses and kettle dead space.

We are working on adding ‘conversion efficiency’ in the near future, which looks only at the efficiency of the extract in the mash tun, before any draining takes place. This number is always the highest.

Well, that’s all for now.  Happy brewing!

Posted in Announcements | 2 Comments »

Hops Harvest Complete

The 2012 hops harvest is complete! Everything is packaged and dried.

The process is to first harvest the hops by hand picking. You can cut the vines down, but this year I decided to leave them up and use a small step ladder to reach the higher cones. My advice is to only harvest one variety at a time and keep track of where each variety is in the picking / drying / packing process.

Then you want to let the hops dry for about 48 hours, until they are no longer moist to the touch.  I weighed a few of the samples before and after. There was about a 50% reduction in weight. This runs counter to the advice of using 4-7 times the normal amount when brewing a fresh hop beer…

The false bottom came in handy for the smaller crops:

When they are dry, weigh them out for packaging.  One of my recipes calls for 2 oz of Chinook, so I weighed out that amount for that particular bag.

A vacuum sealer is a wonderful tool for this process.

I then label the bag, and put them in the freezer.

The inventory feature at the site helps me keep track of what I have.  I wonder if I will ever get around to using that 2010 Willamette??

Here is the breakdown of what I got, and the order harvested in. It seems like Kent Goldings is always latest in the season to harvest.

• Chinook – 10.5 oz
• Hallertau – 10.2 oz (two vines)
• Cascade – 2.2 oz
• Zeus – 2.2 oz
• Fuggle – 2.9 oz
• Magnum – 1.6 oz
• Nugget – 7.7 oz
• Goldings – 5.25 oz
• TOTAL:  42.5 oz = 2.65 pounds, @ $2.00 per ounce retail – about $85 dollars in hops, I’ll take it! You can beat the price of $2/oz if you buy in bulk.

Post by Larry

Posted in Hops Growing | 5 Comments »