Double fan exhaust setup question

[Markus]

G'day all. I currently have a small setup with a couple of plants in a 0.9 x 0.5 x 1.6 m tent. I have a 250 w hps in a cool tube for my lighting with some t5s for side lighting. My exhaust system is 4 inch carbon filter > cool tube > 120 cfm (200m cubed/hr) mix flow fan > ducting out of the tent. This fan should be more than fine for this small setup but I'm having to have quite a large length of ducting to exhaust my air out of a window. This fan I don't think has quite enough power to push the air adequately that far. Is it ok to have 2 fans on the same ducting? I'm thinking I'll put another fan half way along the ducting that is outside of the tent. Would there be any problems with that? Just so we're clear it would be like this-

 

Filter- cooltube- fan - ducting out of the tent- fan- ducting- window.

 

Thanks in advance!

[Markus]

I'd also like to add that it seems like it would be a cheaper and easier alternative to having to shell out for a larger fan, new size ducting, adapters etc etc. cheers

[Ozzy420]

Yes that can be done just try have the 2nd fan as close to the end of the ducting as u can, for some longer ducting this needs to be done.

 

Or just set the cool tube and filter up sep to each other...

[Markus]

I could do seperate filter and cool tube exhausts. If I was to do 2 fans on the exhaust duct would the 2nd fan affect the first one negatively in anyway? Would the second one also help to bring temps down a little in the tent? Cheers

[Chrystal]

Markus the 100mm axle and mixed flow fans are really toys, either step up to a 150mm mixed flow fan or buy a 100mm centrifugal fan << this fan will be plenty for your tent the 100mm centrifugal fans haul a shit load better than the other fans