Herms Coil

HERMS (Heat Exchange Recirculating Mash System)

A HERMS set relies on a heat exchanger, placed in the hot liquor tank (HLT). A copper or stainless coil is placed in the HLT, other vessels can be used. The mash water is pumped through this coil, picking up heat from the surrounding water, and returned to the mash lauter tun (MLT).