What are the different types of Beer Gas?

Also sometimes referred to as cellar gas, beer gas is an essential part of the draught beer system used in pubs, bars and restaurants. And getting the right type of beer gas and blending the correct mixture is a vital part of running a successful bar and ensuring that the best beers are served every time.


The gas is required to essentially push the beer out of the kegs, through a dispenser and into your pint glass. The gas is stored in specialist beer gas cylinders in the cellar and should be supplied by a professional provider who can guarantee safe delivery and a good quality product. The amount of beer gas used is controlled by regulators on the beer gas cylinders, which have an easy to read gauge for the operator to work from. The regulators maintain the pressure and carbonation in the dispensing of draught beer as well as postmix drinks, so getting this right ensures the perfect head on every pint and prevents flat drinks.

Beer Gas

Most bars use beer gas cylinders containing either pure carbon dioxide (CO2) or a mixture of carbon dioxide and nitrogen (CO2/N2). Different ratios should be used for different types of drinks, for example the use of nitrogen in the beer gas mix is essential for creating the thick creamy head and cascading bubbles required for a good pint of Guinness or Stout, whilst lagers need a much higher percentage of carbon dioxide to make them fizzy.


The standard mix for a typical nitrogenised beer is 70% nitrogen and 30% carbon dioxide. These beers are thicker and have a creamy texture because the nitrogen is largely insoluble in liquid. However, a beer dispensed from carbon dioxide beer gas cylinders will be a lot lighter and gassier, because carbon dioxide is soluble.


With more and more pubs and bars competing for the ‘craft beer’ and specialist ales markets, getting high quality beer gas with the right mixtures is incredibly important. Customers expect a perfect pint every time, with even flavour and a faultless head. Making sure your regulators, blenders and other cellar equipment are in excellent working order will also help achieve this. For example, carbon dioxide blenders should be regulated to industry standards of 30% and 60% to ensure ideal dispensing conditions.


If you are in any doubt about the handling of your beer gas cylinders or the mixing of your beer gas, then speak to your supplier. They can offer expert advice on everything from safe storage, to the best regulators to install, to providing comprehensive staff training (after all, your bar staff need to be confident using the cellar equipment).


Getting perfect draught beer takes experience, time and a thorough understanding of the different types of beer gas and beer gas mixtures. Knowing which type of gas to use for which type of drink is a crucial part of running a successful bar, so if you have any concerns, speak to a reputable supplier straight away for advice.