The typical gas input of a Bunsen burner can vary depending on the model and the specific gas being used. However, a general range is:

* Gas flow rate: 1-2 liters per minute

* Gas pressure: 0.5-1.5 psi (pounds per square inch)

Here's a breakdown of the factors that affect gas input:

* Gas type: Natural gas, propane, or butane all have different properties and require different input settings.

* Burner design: Different burner models have different nozzle sizes and gas flow controls.

* Desired flame size: The desired flame size will affect the required gas input.

Important note: Always consult the manufacturer's instructions for your specific Bunsen burner model for accurate gas input recommendations.