Zou et al. carried out full scale heat release fire tests of items of upholstered furniture. A 3.6 x 2.4 x 2.4 m test room was used with a 0.5 l gasoline fire ignition source. Six cushions were tested (60 x 60 x 5 cm, polyurethane foam, fabric covered) and two full scale wooden-frame 4-seater sofas (all non flame retarded). Heat release rate from the two sofas reached 600 and 1000 kW after around five minutes and total het release rate in both cases was around 350 MJ.
“Modelling of heat release rate in upholstered furniture fire”, G. W. Zou et al., Fire and Materials. 2018;42:374–385. http://dx.doi.org/10.1002/fam.2502