Venting 2 x 1000w XXXL reflector and a

Will a 1500 rpm squirrel cage fan <no cfm avail.> with 6 inch opening and about 25 ft. 6 inch of rigid ducting be sufficient to cool 2 x XXXL 1000 watt HPS and another Blockbuster 6 inch 1000watt hps/mh. Planning for basement/crawlspace intake and exhaust through homes clothes dryer exhaust. Also blockbuster reflector will be possibly using a 1000w mh as well as being partitioned off at first and will eventually be swapped to HPS.

Flower room dimensions: 10Lx4Wx9H <2 x XXXL reflectors>
Veg room: 5Lx4Wx9H<1000w mh block buster>

any turns or a straight shot?

707humboldt said:

any turns or a straight shot?

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One intake will run straight into hoods from the basement.then after hoods all inline it will make gentle 90 degree turn upwards into dryer exhaust. Fan will pull at low speed via separate fan controller and exhaust via splice in the clothes dryer ducts altogether being about 40 ft of 6 inch ducts.

Hard to say with out cfm, you might be alright with just the one 90. I always use 8" reflectors to get that extra airflow