Questions tagged [temperature]

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

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18
votes
9answers
47k views

Is it OK to starting fermentation while wort is still warm?

I'm just getting started, so in my first couple batches I realized I had a problem cooling the wort all the way down to 60°F/16°C recommended by my instructions. I boil all of my water, but I don't ...
18
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6answers
33k views

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 ...
16
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5answers
2k views

How do you cool wort?

More specifically, what methods exist to cool your wort after the boil, and what are there respective pros/cons?
14
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4answers
7k views

How many degrees will my carboy heat up as a result of fermentation activity?

Recipe calls for fermentation at 70°F (21°C), basement is 65°F (18°C). I know that fermentation produces some heat, so I was wondering if just letting yeast do its thing will be enough. Otherwise, ...
11
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3answers
2k views

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?
10
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4answers
635 views

Why are Swings in Temperature Bad?

I started brewing back in may, at the beginning of a Californian summer. I quickly learned that the swamp cooler was necessary to prevent unwanted ester formation due to a too-high of temperature for ...
9
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3answers
4k views

High-gravity beer stored too cold to carbonate during bottle conditioning. How can I carbonate this beer?

I made a strong scotch ale. Bottled it up, 2 weeks later no carbonation. Is there a way to save this batch? OG 1.095, Used Safale US-05, 2 weeks in primary, 6 weeks in secondary, FG 1.030, I ...
9
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2answers
7k views

What is a whirlpool chiller?

What is a Whirlpool Chiller and how does it work? What are the advantages or disadvantages?
9
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1answer
1k views

What is the recommended serving temperature for each beer style?

I just finished a kegerator build, complete with a custom thermostat so I can set the temperature to the degree. Now the question is: What temperature range is best for each beer style?
8
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5answers
3k views

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. ...
8
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2answers
704 views

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 ...
7
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6answers
2k views

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 ...
7
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3answers
1k views

Do I need to continuously measure the temperature of my mash tun?

From what I understand, the all-grain brewer warms up water to a particular temperature (usually 10-15*F over the strike temperature), adds this warm water to the grains in a mash tun, in an attempt ...
7
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5answers
4k views

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 ...
7
votes
1answer
4k views

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 ...
7
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3answers
17k views

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 ...
7
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2answers
5k views

Lager bottle conditioning temperature

After adding priming sugar and bottling a lager, does the temperature need to be raised (if so, for how long) to ensure carbonation?
7
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3answers
853 views

Can I put a secondary fermenter in room temperature without creating any off flavors?

I would like to have more brewing capacity, but I am limited by the amount of temperature controlled storage that I have. Do you only need temp control in the primary fermentation process? I'm ...
7
votes
1answer
890 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 ...
6
votes
1answer
96 views

Why do my spice flavors disappear when my beer is chilled?

I recently brewed a second batch of Christmas ale, which was spiced with cinnamon, ginger, clove and nutmeg. I put a bottle in the fridge last night and tried it, but only a small amount of spice came ...
6
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2answers
248 views

Homebrewing: Decoction Mashing

Many beers, especially German, are produced with a method called decoction mash. In that, the rising of mash temperature is achieved each time by talking a portion of the MASH, boiling it, and adding ...
6
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3answers
26k views

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?
6
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1answer
720 views

Best temperature to store carboy after fermentation is complete?

I've got a porter and a stout, both sitting in carboys and both have reached their desired FG reading. However, I'm not able to keg them for another 2-3 weeks because I'm still waiting on a CO2 ...
6
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1answer
209 views

Didn't reach expected FG. Should I postpone bottling? Also: It looks weird!

I'm a newbie brewer currently trying his luck with an irish red ale kit. I've followed the instructions (which weren't complicated since it's a kit), and I've let it brew for about 6 days now (...
6
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3answers
3k 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 ...
6
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4answers
645 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 ...
5
votes
4answers
7k views

Temperature swing of 10+ degrees during fermentation

I'm fermenting a porter, and pitched the yeast at about 75°F (24°C) on Sunday night (4 days ago). Lively fermentation started the next day, and though the wort had cooled to about 68°F (20°C) the ...
5
votes
6answers
1k views

What type of beers stand up to temperature variation during fermentation?

I've just moved from a Condo into a house, where I am now paying for heat. In the area that my Domestic Sergeant Major has permitted me to brew in, the temperature varies from 16° to 21° C throughout ...
5
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2answers
336 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?
5
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3answers
299 views

30° Celsius bottle conditioning. How bad is it?

I have a problem my house is getting super hot during the summer, cannot find cool place to store my beer. I made a little insulated chamber but I seem not working at all. Recently I brewed an ale and ...
5
votes
1answer
338 views

Interpreting single-infusion mash instructions with two temperatures listed

I've been brewing all-grain for a while now, but I can't figure out why the recipes I read have the following. Take this example: Mash Schedule: Single Infusion, Light Body Total Grain Weight: 10.25 ...
5
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3answers
586 views

Airlock sucking inward

I've made three demijohns of elderflower wine, and after fermentation stopped and I racked the wine, then all three demijohns started sucking in the liquid which is in the airlock. We have had some ...
5
votes
1answer
377 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 ...
5
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3answers
2k views

How do you insulate a cooler based mash tun?

I have a Coleman 70 Quart Xtreme cooler that I've modified for my mash tun. I seem to be losing a lot of heat out the top. Are there any good ways to insulate it to help prevent heat loss?
5
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2answers
14k views

How to Properly Increase the Temperature of a Batch after Primary Fermentation

I've read tidbits how that after the first 3 days of fermentation, you would ideally raise the temperature of the carboy for the remainder of the brew. How, exactly, does one do this? Say the Wyeast ...
5
votes
6answers
431 views

Advice for high temperature fermentation (for a beginner)

I'm living in Singapore where the ambient temperature fluctuates between 28 and 33 C most days. In the back of my apartment where I keep my fermentor, the temperature should be pretty stable around 30....
5
votes
2answers
543 views

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 ...
5
votes
2answers
575 views

Should I brew in too-warm climate or substitute the yeast?

I'm about to brew an Amber Ale (from an LHBS kit) that comes with a US-05 Safale yeast. The forecasted temperature for the next couple of weeks is likely to remain at min 20C (68F) overnight & ...
5
votes
1answer
759 views

Lager Bottling Temperature

I've got a lager that's been in my garage for the last month (generally hovering between 30 and 36F), and I saw a question relating to temperatures for bottle conditioning a lager, but I'm wondering ...
5
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3answers
3k views

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 ...
5
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2answers
2k views

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 ...
5
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3answers
2k views

How important is temperature in secondary?

Say I'll want to brew an imperial stout, let it ferment in primary and then rack it to secondary. How important is the temperature in secondary? I have a temperature controlled fridge to hold the ...
5
votes
1answer
301 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 ...
5
votes
3answers
9k views

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 ...
4
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3answers
2k views

Does a too low fermentation temperature affect taste?

I currently have 4, 5 gallon batches going. After a bad episode of brewing at a high temperature (72-75°F) for 2 batches, I have gone in the opposite direction and aim for 60*F, and frequently dip ...
4
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2answers
6k views

What is the ideal temperature during carbonation with priming for an ale?

During sugar priming, how does the temperature influence? In my understanding, higher the temperature, faster the carbonation process. But can this somehow produce some off-flavors on the beer? Too ...
4
votes
6answers
15k views

Mashing at too High of a Temperature

I did my first all grain batch last night and went way over the desired 150s range on the temperature of my mash. It ended up being around 170f. What effects will there be from mashing at 170 (or ...
4
votes
2answers
353 views

Temperature conditions for saving cropped yeast?

What is an ideal environment for saving yeast I have harvested from my fermentation vessels? The lowest survivable temperature? Highest? I recently found the top of my fridge to be too cold when I ...
4
votes
3answers
939 views

Storing bottle conditioned beers and carbonation

I store all my beer at 55°F(12.7°C). Do I need to worry about the beers that are bottle conditioned not being carbonated, or not being at the proper carbonation level? Should they already be ...
4
votes
4answers
697 views

Correct temperature effect on Specific gravity

Is there an equation that corrects specific gravity while considering temperature effect in Celsius, which does not presupposes a set hydrometer calibration temperature? A direct relation, not tables ...