Percentage change in line fluxes for a series of water lines. The plus signs are a comparison between the fluxes from the “standard” model and the fluxes computed with MCFOST using the level populations of the “standard” model (large water molecule, 70 × 70). The asterisks are a comparison between the “standard” model with the new LAMDA file and the small water molecule and the MCFOST run. Note that MCFOST contains only H₂ collisions.