BrewJacket Immersion: Lager Without a Refrigerator

BrewJacket Immersion is the world’s first all-in-one fermentation temperature control system. Immersion is a powerful solid state cooler and temperature controller that gives you the ability to make the best homebrew lagers and ales you have ever created, without sacrificing space to a refrigerator, and while using the fermenters you already own*.

BrewJacket Immersion can bring your homebrew lagers as low as 35º F (20º C) below the ambient temperature of your house, allowing you to create craft lager beers without a refrigerator. Just set the temp and Immersion cools your lager until it is achieved, then actively maintains the set temperature.

Lagers require fermentation temperatures around 50º F (10º C) for a period of 3 weeks or more. Before Immersion, there simply wasn’t an automatic way achieve this without a dedicated second refrigerator or access to a Bavarian cave.

Immersion also easily maintains temperatures for ales. Just set the temperature you’d like to ferment at and sit back. Ales produce considerable heat during primary fermentation, upwards of 5º to 10º F depending on your recipe. If left unchecked, hot fermentation environments can produce esters, fusel alcohols, and other classic homebrew flaws. Quite possibly the biggest thing that separates home brewed from professionally-brewed beer is the temperature at which it was fermented.

*Immersion is compatible with most fermenters up to 8 gallons (30L). Some drilling may be required. Immersion is not compatible with traditional small neck glass carboys that accept stopper sizes smaller than #10.