Ask Mr. Wizard Fluctuating mash temperatures Q Just how critical is temperature control in all-grain brewing? I have recently built a basic three-tier all-grain system out of three converted kegs. I am in the Air Force, and currently stationed in England. Unfortunately, I must brew outdoors. This time of year the weather is cold, cloudy, windy, wet, and rainy especially on the weekends during my brewing sessions. I have brewed six 5-gallon batches (witbier, honey wheat, Trappist ale, ESB, brown ale, and a kölsch) and with every batch I have had a difficult time keeping my target temperature of 152° to 154° F. My temperatures bounce back and forth between 145° and 160° F. I usually hold my target temperature for 75 minutes of the 90-minute mash. When the temperature does fluctuate, I get it back to the target as quickly as possible. Read More |
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