A room of concrete has dimensions 35 m by 3 m by 2.5 m high with two windows which are 0.9 m by 0.9 m each. A fire in the room causes an energy release rate which increases linearly from 0 MW to 1 MW in 10 minutes and is constant after this.

a) Will the fire become ventilation controlled ?

b) Is there a risk for flashover in 10 minutes ?

c) Calculate the gas temperature at time 5 minutes from ignition.