BolgBeorach
Active Member
Does anyone have any data on how the temperature of the headspace affects yeast, particularly if it is soon after pitching? My understanding is that the yeast ferments from the top of the wort, so if they have been only recently pitched, might they still be floating around on top and drawing heat from the headspace? I ask this because I am fermenting 10 litres in a 30 litre vessel (which isn't ideal, I know), and while the therm strip on the side of the vessel reads 18 degrees Celsius, I got a reading of 24 degrees from the surface of the wort using a thermometer gun. I have a heating control system in place, but since it controls the temp according to the body of the wort, and not ambient, it means that the ambient can fluctuate between extremes, because it obviously heats up and cools more quickly than the liquid. However the headspace follows the ambient, and as a result I am curious as to how it might affect the yeast.