Collection: Glycol Chillers & Fermentation Temperature Control

A glycol chiller circulates a chilled glycol-water mix through a cooling sleeve in your fermenter to hold a precise, stable fermentation temperature regardless of your ambient room temperature. It's the most reliable way to control fermentation temperature if your brewing space temperature fluctuates seasonally.

The GC2 and GC4 differ mainly in cooling capacity, with the higher-numbered unit generally supporting more simultaneous fermenters or a larger cooling load. Choose based on how many fermenters you plan to run at once, not just your current single-fermenter setup.

No, you do not need a fermenter coat for the glycol chiller to work with the GF30. The GF30 Fermenter Coat is ideal for those in a climate experiencing high condensation rates when using the Grainfather GC4/GC2 Glycol Chiller or Cooling Pump Kit to lower the fermenter’s temperature.

Use food-grade propylene glycol specifically, never automotive antifreeze, since automotive antifreeze contains ethylene glycol, which is toxic and unsafe near any beverage. Grainfather's propylene glycol is formulated for food-safe brewing use.

You can program the temperatures required on the GF30 fermenters and the Glycol Chiller. You can also automatically control this with the use of the Grainfather App.