Can i have two fans extracting

Howdy folks. Just wondering, atm with this hot weather if i could implement a spare fan i have into my extraction.

I have a 5 inch rvk doing main extraction but like i say, i have a spare 4inch lying.
Rather than using a y splitter etc could i have it like this...

Filter> 1 foot of ducting> 5 inch fan> 7 foot of ducting> spare 4 inch fan ?

Would that work ok or could i mess up my main 5 inch fan in anyway by adding the 4 inch too?
I mean could the 4 inch work against the 5inch or anything and hinder its performance?

I dont have the option of using the 4inch for an active intake as my tents in a closet next to my hallway. Im just getting away with the noise of the 5inch as it is.


Thanks.

If you are doing it the way you planned i am sure there would be an issue with using the lower power fan at the end. I would have thought it should go before the 5inch.


Have you contemplated going aircooled?

I am in the UK and with my closet using a 600w in an aircooled hood with ambient air at a temp of 29C my closet only hit 30.4C

>>>>>>> https://www.rollitup.org/grow-room-design-setup/441212-my-new-closet-re-design.html <<<<<<<<<


You may have a better result using the 4 inch as an extra exhaust rather than trying to run inline with 2 fans.

Hi mate. Yeah, i often dream of an aircooled hood lol. Just dont think i have the space and cash atm. One day though.

Good point about the 4 inch being first, that does make sense, just thought i should keep the 5 inch to remove any immediate heat, then the 4 inch to carry that away. Dunno, just my weird way of thinking lol

Iv decided to scrap the idea. Im thinking of boxing up my fan and damping it with rockwool and see how it is for an intake. If not the girls will just have to put up with the heat.

Too bad about the aircooled hood you could seperate the two exhausts and use one just for the lights running all the time and the other on the thermo to control temp in the grow space.

They use booster fans all the time to improve airflow down the line, I would think a good rule of thumb is if you have adequate airflow comming out of the end you are fine (similar to what is comming out of the fan directly). If not then adding a fan would be an option, alot of time in HVAC situation the booster fan is actually smaller then the duct.