Extracteur plus filtre

600+ is kinda overkill you would have lots if negative pressure even with ducting and carbon filter on both side of the fan and a silencer. . In my opinion 400+ is sufficent. If buget is no concern i'd go with a affinity cloudline t6 so great control that can reduce or augment speed both according to temeprature or humidity with the ability to connect another clouline fan to the control unit if ever you upgrade to a bigger tent the controle wirks on all model. But everyone have their preferences whether it be a can-fan max-fan q-fan pro vortex. Uts all preference. But for the upper hand quality a liw cost and efficiency. Cloudline is very versatil du to its control. can fan Max-fan is very good product but $$$ and cheaper brand can last or break for unknown reason. My guess humidity and cheap plastic wear in certain model.. i'ld go with a cloudline has as the highest quality low budget . Sur yiu oay double. But atleast you know its doing its thing controling your environement..