I have no real explanation for this setup. I have emailed him and await his answer on the purpose of the ventilator when he already has a Numa as Diki pointed out. I'm not so sure if a T-2 can produce the same organ Leslie effect as the Numa, however with a vent hooked to a T-2 it's Hammond City. Why he needs all three together is a good question. That said he has quite a few videos with this setup that are entertaining