Can I do smaller batches than 30 L (8 US Gal) and still expect efficient heating/cooling from the Conical Fermenter? Kim September 23, 2020 07:27 Updated When heating the contents of the fermenter, this will work with any amount of liquid as it heats from the bottom. Anything below 19 L (5 US Gal) for cooling won’t be as effective. Related articles Can I add fruit/other adjuncts directly to my fermenter? Shipping & Delivery Costs - United States Why did I get a low starch to sugar conversion? Can I bottle directly from my Conical Fermenter?