Model-dependent changes of the room acoustical parameters (a) EDT, (b) T₂₀, (c) G and (d) STI between fully absorbing compared to fully reflecting facade, pooled over floor materialisation (reflecting and absorbing), with reflecting balcony soffits. Differing capital letters (A, B, C) indicate significant differences between floor plans (p < 0.01). Significance between models with 4 and 7 storeys are indicated with connection markers (p < 0.01).