The formula to calculate the burning rate in a biomass furnace is:

\[ BR = \frac{FCR}{A_g} \]

Where:

• \(BR\) is the burning rate in kilograms per hour per square meter (kg/hr-m²).
• \(FCR\) is the fuel consumption rate in kilograms per hour (kg/hr).
• \(A_g\) is the grate area in square meters (m²).