Comparison between the observed H₂O fluxes (black dots) and the two best-fit models for L1448-B2, which are given in Table 2: the green model is the fit to the HIFI H₂O lines and the two blue models are the extremes of the obtained density range that fits the PACS H₂O lines (squares represent n(H₂) = 5 × 10⁵ cm^-3 and circles represent n(H₂) = 5 × 10⁶ cm^-3). The red model represents the sum of the fluxes predicted for each line by the green and the two blue models. The fluxes predicted by the models have been corrected for the relative predicted filling factors. Calibration uncertainties of 20% for the HIFI data and 30% for the PACS data have been assumed. The open triangle represents the upper limits of the HIFI H₂O 3₁₂ − 3₀₃ line (E_u = 249 K).