Nope, the urn just heats the water (and, later in the process, boils the wort with the hops). The grain is mixed with the hot water and mashed in the cool box - the 'mash tun'.
@Olly398 started
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Nope, the urn just heats the water (and, later in the process, boils the wort with the hops). The grain is mixed with the hot water and mashed in the cool box - the 'mash tun'.