PSI, or pounds per square inch, is the unit of measure used for gas pressure. This influences the BTU output of your fire pit or fireplace. The greater the gas pressure, the higher the BTU output--and vice versa.
To ensure your safety, it is important to determine the gas pressure you are working with so that you may choose the correct AWEIS properly configured to suit your needs. For instance, features utilizing a 2 PSI gas pressure will require a smaller gas orifice to reduce gas flow. If you're still unsure of your setup's PSI requirements, we recommend reaching out to your local professional installer.