Fig. 9: The result of the final MLR model 6.

MLR model 6 (Table 4) is based on 43 empty, 5 filled boxes and 5 stacked boxes (boxes with parameter s > 0.05 removed: A4 Kraft wrap and microperforated plastic boxes (IKS_PP104, IKS6DW_PP104, ISS_PP104, ISS8DW_PP104)). Boxes can be classified into three groups according to their RH damping capacity: suitable boxes with HA index > 85.8 (green shade), likely suitable boxes with HA index between 78.5 and 85.8 (grey shade), and boxes with poorer RH damping capacity, HA < 78.5 (red shade).