Temperature plays a key role throughout the brewing process, particularly during the mash and during fermentation.

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Is a yeast-starter without temperature control worse than no yeast-starter at all?

EDIT: Crap, it appears I mislead myself. Northern Brewer includes a temperature range of the particular Wyeast you are using, and I assumed this temperature range factored out off-flavors. I read on ...
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378 views

How Much (and How Fast) of a Drop in Temperature can (Ale) Yeast Tolerate? (And Preliminary Results from My Experiment)

I have rigged up a Raspberry Pi with some DS18B20 temperature probes that measure both the water in the swamp cooler and the beer directly and store the results in a MySQL database. I brewed a new ...
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How Should I Place a Digital Thermometer into My Fermentation Chamber and Keep it Airtight?

I have a setup with a raspberry pi and two DS18B20 digital thermometers that measure the temperature of the ambient air and the water in a swamp cooler that I place my fermentation chamber in. I was ...
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Going Below Optimum Yeast Temperatures (For Ale in Particular)

So I understand that going above the optimum yeast temperature specified is a bad thing and will cause major off flavors. But what happens when you go underneath it? For example, I am currently ...
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4answers
509 views

Can forced air be used effectively to cool a second chamber from a keezer?

Would it be possible and effective, without causing undue stress to the keezer, to temperature control a second insulated chamber? I would like to be able to control fermentation temps and/or run ...
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Networked/Connected Thermometer for Measuring Water in Swamp Cooler

I was hoping to put together an information system that could measure the temperature of the water in a bucket where I place my fermenting-bucket and notify my smart phone when I need to replace the ...
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3answers
475 views

Too much sweetness and banana like aroma/taste

I've been brewing 6 batches of Ale and I've had problems with sweetness and banana like aroma and taste (esters probably). I think the problem is the fermentation temperature. My fermentation bucket ...
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71 views

“Quiescence Yeast” Or will my yeast-to-be survive a travel to the caribbean?

This is a related question, but not a usefull one to me :( I intend to buy liquid yeast from northenbrewer (WLP099 in case you wonder) and I currently live in Venezuela, a very hot and sunny place (...
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What's the best/safest way to handle likely bottle bombs?

I'm using 16oz amber e-z cap bottles (swing tops). I've read that they'll self-vent before exploding, but I've heard other accounts of them actually exploding. I'm storing them like this and it's ...
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1answer
118 views

Isinglass and temperature

The wine kit that I am making uses isinglass for fining and recommends storing the wine at 70 degrees during the process. In the past I've used gelatin in my beers to clear and I know that it works ...
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1answer
173 views

How much heat can a demijohn take?

I'm planning to serve some homemade cider, hot and mulled at a market stall in the coming weeks. I'll be siphoning out of a 23L demijohn (like this: http://www.toowoombahomebrewers.com.au/Wine/...
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Would placing the fermenter tank in a tub of water be a good way to handle hot environments?

Summers where I live typically have 80F nights and it can easily pick up to 95 degrees during the day. I have a plastic trash can (which I bought for this purpose) that I have filled up with water. ...
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2answers
252 views

should I/how do I account for temperature differences for gravity readings?

I've taken my OG at the start, and another reading last night. Only last night did I register that my OG seemed slightly low according to what the brew can suggested as typical. My OG was 1.037 (can ...
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1answer
327 views

Should I extend boil times if temperature drops?

I use an electric burner when I home brew. It doesn't have a ton of excess power but it can get a nice rolling boil going. Occasionally, when I add malt extract to my kettle the temperature drops ...
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2answers
850 views

Yeast pitching and wort cooling

I'm making an American Brown Ale and added liquid yeast to the wort that may have been too hot. The yeast was in the fridge and out to cool for 45 minutes. My guess is: Wort temp: 26-27C or about 80F ...
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1answer
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Side-effects of 'lower than recommended' fermentation temperatures?

I have a Ginger Beer kit on the go. It's sitting in the kitchen and ambient temps are ranging from 15 to 20ºC (59-68ºF). The beer was started 3.5 days ago and I was away for the weekend, I can see ...
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1answer
92 views

Control Products 9102D Temperature Controller won't go below 50 degrees?

So I got a dual stage controller (http://www.amazon.com/gp/product/B0057APR3I/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1) to hook up to a keezer that I am making. I got it wired up today and was ...
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1answer
917 views

How early can I know if a brew is ruined?

Today I tried my very first brew using a Coopers DIY kit. I was told the Lager mix that comes with the kit probably won't taste amazing, but it should be hardy and forgiving for beginners that don't ...
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1answer
99 views

Why does the temperature reading rise when stirring the boil?

During the boil and more pertinently afterwards when I'm cooling the wort I have noticed that when I stir the thermometer around the temperature will rise (sometimes up to double digits) but when I ...
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1answer
108 views

Measuring temperatures at two points: weird trend?

This seems like an ideal place to ask a question that has been keeping me confused for a little while now. But I apologize if I've posted in the wrong area. My question is that I don't seem to ...
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4answers
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Will refrigeration help carbonate my beer?

After two weeks of bottle conditioning at about 55-60°F (13-16°C), my beer is still a bit flat. I put a few in the fridge and after 2 days, they tasted just as flat. At this point, what should I do? ...
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1answer
624 views

Will this Pilsner technique work?

I want to brew the Brewers Best Continental Pilsner with the given equipment and parameters that I have, which is not much. My basement is averaging 40-45°F (4-7°C) degrees which I think should be ok ...
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1answer
3k views

Storing full kegs at room temperature

So I have a related question here, but my questions are the following: I only have one (and only have room for one) dedicated chest freezer/fridge for brewing. I have one beer (Marzen) kegged and ...
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Can I use liquid nitrogen to cool my wort?

Basically what the title says. I'd like to switch to all grain at some point but the volume of water required to cool a decent sized wort down scares me. Assuming I have access to liquid nitrogen, ...
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2answers
324 views

Slow temperature rising vs equivalent fluctuations

I've read a few accounts of brewers using slow temperature increments to bring out particular flavours from the yeast that they're using. For example, stepping up 1C or so every day over a few days. ...
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Do I need to adjust for temperature with a refractometer?

Sorry for the simplicity of the question, but I asked Google and she didn't know. Stackexchange is my next stop. I took a brix reading of my steam beer wort at 13 brix (~1.052 SG), but it was ...
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705 views

Does keg secondary fermentation temperature matter?

I'm considering investing in a keg, fridge, etc. I live in a warm climate and currently do secondary fermentation in the bottles in the heat. I've read that people have chest freezers to store kegs. ...
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289 views

Effect of decreasing mash temp?

Let's say I mash in at 65 C and over an hour it drops to 60 C - will this have a detrimental effect on my brew?
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Is this a stuck fermentation or did I screw up the mash?

So, a little under a week ago, I brewed a goodly sized stout (1.069 OG) and when I mashed it I ended up missing my mash temp by about 4 degrees. (I was aiming for 158 and ended up with about 162-163.) ...
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Can I bottle condition / carbonate my Hefeweizen at “room” temperature (74-78 degrees)?

My first brew is almost ready for bottling. Winter is pretty much non-existent where I live, so "room temperature" is typically between 74°F and 78°F (23°c to 26°c). I was planning to leave the ...
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1answer
542 views

How quickly do I let the fermentation temperature rise if it starts off too low?

I brewed something like a Black IPA today (hoppy and dark). I ferment in carboys in a chest freezer with an external temperature control. It is frigid today, and the garage where the chest freezer ...
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765 views

Fermentation hasn't started?

Made a kit on Saturday, 1/2 lb. Caramel 80 specialty grain, 9.15 lbs rye extract. Kit came with the Wyeast American Ale smack pack. When I got the yeast pack out of the fridge, the pack was already ...
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Quick fermentaion, what should i do?

I made a batch of cider 6 days ago, and it started fermenting nicely, however now the bubbles in the air lock have slowed to nearly 1/min (according to my recipe means it's fermented) However this is ...
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overheated the mash by a long shot

I asked before and got some help and have done some reading since. The temp in my mash jumped from 175 to about 195 after I put the lid back on. How much damage did I do? Some things I've read since ...
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Over temp when steeping an all grain

I started my steep at about 175 and wans't concerned but when i put the lid on the vessel to keep it constant it shot up. In the end my grains steeped at about 190 for 40 min. This is a pumpkin ale ...
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Secondary Fermenter Temperature — Colder?

My American Pale Ale has been fermenting away nicely for the past few days and I'm certain I'll be racking to secondary within a few days (after SG gets stable). I'm curious: I've been keeping my ...
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246 views

How long should I keep a lambic at fermentation temperature?

Normally I ferment beer in my basement, which varies in temperature from 50-70 degrees, depending on the season. These temperature swings can be bad for fermentation, especially in winter. So when I ...
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How many degrees will my carboy heat up as a result of fermentation activity?

Recipe calls for fermentation at 70 degrees, basement is 65. I know that fermentation produces some heat, so I was wondering if just letting yeast do its thing will be enough. Otherwise, do I need ...
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How long do I need to maintain my fermentation temperature?

Do I need to maintain my desired temperature until bottling or take it out of the "ferm chamber" after initial fermentation is done? What about with long term brews such as sours?
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444 views

Can a wort be cooled too much?

When chilling the wort after a boil, if it falls below the yeast's operating temperature, should I wait until the temperature comes back up before adding the yeast? I typically chill my wort with a ...
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894 views

Hydrometer Temperature Limit

I am about to do my first all-grain batch. After (batch) sparging is it safe to drop the hydrometer right in or do I need to let the wort cool to a specific temperature first? I realize I will have to ...
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Will rapid ambient temperature drop kill yeast or just slow them down

I have just put on my first all grain homebrew (a porter) here in Melbourne, Australia. After a day or so it was bubbling away quite nicely. A couple of days ago the weather decided to change ...
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Is it okay to store cold beer at room temps after conditioning?

I brewed a nice batch of Black Cherry Ale, which has been bottle conditioning at 35F for about 5 weeks. I will need space in the fridge for a keg of Summer Ale in about two weeks. My basement temps ...
3
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3answers
311 views

Any difference between lagering dubbel at 36F versus 45-50F?

I have a Belgian Dubbel bottle conditioning, the recipe for which came from Brewing Classic Styles. For this recipe, Jamil says to carbonate the beer, then lager for one month at 45-50F. I have the ...
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Temperature correction for specific gravity

If I want to convert my specific gravity reading from one temperature to an equivalent specific gravity at 60F how do I do it? Can you give me a correction factor for this case?
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Has anyone ever had problems with a 2 day diacetyl rest at room temperature?

Say 70 - 74°­F (21 - 24°C) I normally do what the books say and rest somewhere in the 60s but this means brining my fermentation freezer up to that temperature. I am mostly an Ale brewer so normally ...
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Does the length of a diacetyl rest matter?

Does a diacetyl rest for a week or more adversely affect the beer in any way? With our busy lives it's easy to forget about a batch for a few days (especially when it's in the dark recesses of a ...
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What happens when beer freezes?

After a bit of trouble with a thermostat on a 2nd hand fridge, I discovered that my latest batch of bottled, ready-to-drink brew had frozen. What happens to beer when it freezes? Will the taste be ...
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Is RTD beer susceptible to any damage from temperature fluctuations?

I've got a fridge set up in my garage loaded full of delicious home brew, all ready to drink. To save on power, I'd like to only turn it on when I need it, say once a week or once a fortnight. Could ...
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Brewing at Altitude

How does high altitude affect brewing chemistry? Up here in Denver (5280') or even higher in the mountains (some towns in Colorado are 9000' and higher), water does different things. In Denver, water ...