Reynolds-Averaged Navier-Stokes (RANS); Large-Eddy Simulation (LES); smoke dispersion; sensitive components in telephone central offices (TCO); semiconductor clean rooms; downward displacement ventilation; heat release rates in kW for all experiments; ratio of flame height to ceiling clearance Lf/H for all fires with no ventilation; ventilation ratio for the present experiments and the experiments; containment length; centerline temperatures