What temperature do you pressure ferment?

Answered by John Hunt

When it comes to pressure fermenting, the temperature range can vary depending on the specific yeast strain and desired outcome. However, a common temperature range for pressure fermentation is between 65 and 68 degrees Fahrenheit (18-20 degrees Celsius).

Pressure fermentation is often used as a way to suppress ester production in beer, particularly with lager yeasts. By fermenting under pressure, the yeast is kept in contact with the beer and is less likely to produce esters, which are responsible for fruity or floral aromas in beer. This can be especially beneficial when brewing lagers, as they are typically known for their clean and crisp flavor profiles.

Starting off fermentation at the lower end of the ale yeast temperature range (65-68F) can also have benefits. This temperature range is generally considered ideal for many ale yeast strains, as it allows for a slower and more controlled fermentation process. The lower temperature can help to produce cleaner flavors and limit the production of unwanted by-products.

One advantage of fermenting at the lower end of the temperature range is that it can allow you to reduce the amount of yeast pitched into the fermenter. When fermenting at higher temperatures, a larger yeast pitch is often required to ensure a healthy fermentation and to prevent off-flavors. However, at cooler temperatures, the yeast tends to be more active and can propagate and ferment more efficiently, reducing the need for a larger pitch.

It’s worth noting that every yeast strain has its own optimal temperature range, and it’s important to consult the specific recommendations provided by the yeast manufacturer. Additionally, factors such as the desired flavor profile, beer style, and personal preferences can also influence the temperature at which you choose to pressure ferment.

In my personal experience, I have found that fermenting at the lower end of the temperature range (65-68F) when pressure fermenting lagers has yielded excellent results. The beer has been clean, crisp, and free from any noticeable ester production. It also allowed me to reduce the yeast pitch, saving on costs and ensuring a healthy fermentation.

Pressure fermentation at a temperature range of 65-68 degrees Fahrenheit (18-20 degrees Celsius) is commonly used to suppress ester production, particularly when brewing lagers. Starting off fermentation at the lower end of the ale yeast temperature range can also allow for a more controlled fermentation process and potentially reduce the yeast pitch required. However, it’s important to consider the specific yeast strain and desired outcome when determining the ideal temperature for pressure fermentation.