Help! Ventilation conundrum

Evening all!

I'm looking at buying the Secret Jardin L90 next week to increase my grow potential as i'm still limited on space, but I'm seriously scratching my head when looking at how to ventilate all chambers with one fan & carbon filter.

I don't want to have to buy a second fan and filter if I can find a way to get away with it, mainly due to extra noise levels and cost involved, so can I get some suggestions from you guys??

Here's a link to the specifications & photo's:
http://www.secretjardin.com/en/grow-tent-secret-jardin/lodge.html

Any ideas will be much appreciated!!

Hey check out my thread I posted a couple days back with a similar question. Read the replies and you should get some useful information.
P.S. if you have the tools or know someone who does, I highly recommend building a box from plywood and 2x2's. Much cheaper, much more secure in every aspect, customization is easy.

https://www.rollitup.org/t/air-intake-exhaust-design.907018/