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

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How long to refrigerate yeast starter before pitching into wort?

When I brewed last night, my yeast starter had been in the refrigerator for 24 hours and it had "a lot" of yeast settled to the bottom. I am brewing tonight, and my yeast starter has only been in the ...
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194 views

Does Warming Up Carboy After Pitching Yeast to Fermentation Temperature Decrease Lag Time?

When I adopted proper aeration and a yeast starter, I decreased my lag time to roughly 12-14 hours. Recently I bought Ferwraps and have been using them. One night, I got the idea to apply the ...
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2answers
89 views

At what point on a Yeast's Optimal Temperature Range should the power to a Fermwrap be turned off?

I finally hooked a PowerSwitch Tail II up to my Raspberry Pi and Fermwrap. The RPi has DS18B20 temperature probes directly measuring the temperature of the wort by going down through the airlock. For ...
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4answers
245 views

What's a good session beer to serve cold?

I made an ordinary bitter a while back and it really brought to light why it's served at cellar temperature. At 55F, it was a bit malty, with nice hops. At 45F, it was like seltzer. Very drinkable, ...
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89 views

Is it important to reach pitch temps quickly?

I have seen lots of posts where guys say they stayed up late because their wort hadn't reached pitch temp until 4am or somethinglike that. What is the harm in just going to bed at 1 or 2, waking up ...
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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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Can I increase secondary fermentation temperature after a week?

My ale batch (US-05) was fermented at 68ºF for 11 days, when I removed the sediment and moved it to a Secondary Fermentation with a much lower temperature (41ºF) for a week now. Since yeast has to be ...
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Pitched yeast at 40 deg F. Too cold?

I pitched the yeast at 40°F. Was it way too cold and should I re-pitch?
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796 views

Lagering (Secondary to Bottling to Lagering)

So I recently bottled a pilsner recipe after a drop from 1.061 to 1.011 specific gravity (over 6% ABV potential), and my recipe instructions called for 7-10 days at room temperature (since they've ...
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1answer
222 views

Why Does a Heater in a Swamp Cooler Require a Pump to Distribute the Heated Liquid?

I am facing my first winter of brewing with a swamp cooler. I need to acquire a few aquarium heaters (incidentally, please let me know if you know a good brand) and drop them in my swamp cooler to ...
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520 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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Does temperature during bottle conditioning effect the flavour?

I made a Weis beer and my primary fermentation temp was 19C. After 2 weeks I mixed priming sugar into my beer and bottled it. I then conditioned the bottles for a week at 21C. I know when in primary ...
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158 views

Does Low-Attenuated Wort due to Low Temperature have a Higher Propensity to Bottle-Bomb while Bottle Conditioning at a Higher Temperature?

I bottle condition underwater with frozen water bottles to keep the temperature down. I probably bottle conditioned my last batch of beer beneath 60*F, and it didn't carbonate all that well, or at all....
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242 views

Washing yeast from a brew that was pitched too warm?

I wasn't able to cool down the wort well enough and pitched WLP001 at 85 degF (I know, what a failure...) My home is 82 degrees indoors and the water comes out of the faucet at that temp too. Ran out ...
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290 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 ...
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534 views

Does too Low of a 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 ...
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380 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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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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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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3answers
481 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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120 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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174 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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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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328 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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852 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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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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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
950 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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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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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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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
632 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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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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326 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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2answers
706 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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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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290 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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1answer
547 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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772 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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5k views

What is a whirlpool chiller?

What is a Whirlpool Chiller and how does it work? What are the advantages or disadvantages?
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270 views

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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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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Kegging at basement temperature

I am a novice at kegging. I don't have room for a kegerator or chest freezer so I simply keg at basement temperature. My basement is currently 69 F and I've had 5 gallons of tripel on pressure for 3 ...
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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?
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How do you cool wort?

More specifically, what methods exist to cool your wort after the boil, and what are there respective pros/cons?