Example of RADEX non-LTE modeling of the para-H₂CO kinetic temperature for G5.89-0.39. Para-H₂CO 3₀₃–2₀₂ (red solid and dotted lines represent observed values and uncertainties), 3₂₂–2₂₁ and 3₂₁–2₂₀ (a) and b), blue solid and dotted lines) line brightness temperatures and para-H₂CO 3₂₂–2₂₁/3₀₃–2₀₂ and 3₂₁–2₂₀/3₀₃–2₀₂ ratios (black solid and dotted lines). The gray region is characterized by χ (<1.5) with density n(H₂) and kinetic temperature T_kin for a para-H₂CO column density 4.7 × 10¹⁴ cm^-2.