ok i installed a 100mm inline fan which is silent it only flows 70m3 a hour but it dropped my temps near the plants to around 26c, but near the light at the top of the cupboard temps are 42c im going to install a 180m3 fan in the cupboard to try and reduce this some more if this doesnt work then il have to buy a special reflector and hook the fan up to it i guess to get rid off some more heat, does anyone know how many cubic feet i need to shift to cool my grow room, cheers