Secret Jardin DR120 + 400w HPS = Ventilation Requirements?

I just erected my Secret Jardin DR120 (120cm x 120cm x 200cm): when I get a replacement bulb I'm going to be using a 400w HPS to light my babies. At present I do not have a Cooltube, and would prefer to use the standard issue reflector I already have rather than spending any more money getting one.

What sort of ventilation will I need to keep the temps within a degree or two of my bedroom's ambient air temps?

You will need around 100cfm exhausted out of the room where it can't be recycled through the intake.

LMAO!!! @ the idiot above me....


anyways....get a cooltube. stop being cheap. a cooltube will greatly help you reduce those hot temps.

i have a 120 and run 1000watter in there.....2 ventilation setups. one separate for lighting and one separate for the whole tent!