TIANTAI Beer Equipment Co. supplies beer brewing brewery equipment system including miller, brewhouse , fermenters, brite beer tanks, beer bottling machine,beer canning machine, wine and Kombucha eqiupment, distiller equipment. In home brewing and craft brewing equipment, HERMS stands for Heat Exchange Recirculating Mash System in brewhouse. It’s a method used to precisely control mash temperature during the brewing process in beer brewing equipment.
How HERMS works?
Instead of directly heating the mash (grain + water), HERMS uses an indirect heat exchange:
1.Wort (liquid from the mash) is continuously recirculated from the mash tun.
2.It passes through a stainless steel coil (heat exchanger).
3.That coil sits inside a separate hot water tank (usually the Hot Liquor Tank, HLT).
4.Heat transfers gently from the hot water to the wort.
5.The warmed wort flows back into the mash tun.
This loop continues, maintaining a very stable mash temperature.
Key advantages
Precise temperature control → great for step mashing
Gentle heating → reduces risk of scorching the grain
Clearer wort → constant recirculation acts like filtration
Automation-friendly → commonly used in advanced systems
Compared to other systems
HERMS → indirect heating via heat exchanger (more gentle, slightly slower)
RIMS (Recirculating Infusion Mash System) → direct electric heating (faster, but risk of scorching if not controlled well)
Simple analogy
Think of HERMS like a water bath (double boiler) in cooking—you’re heating something indirectly to avoid burning it while keeping tight temperature control.
Flow explanation
1.Wort is drawn from the Mash Tun
2.Pump sends it through the coil inside the HLT
3.It gets gently heated by surrounding hot water
4.Warm wort returns to the mash tun
5.Cycle repeats continuously
Key idea
The wort never directly touches a heating element
Temperature is controlled indirectly via the hot water in the HLT
If you are interested in any beer brewery equipment, please feel free to contact us:
Ivy Liang(Sales Director)
Email: [email protected]
