For me I think it's a bit expensive spending 160€ in this stuff getting the heat out.
And probably this is going to consume power somewhere around as an GPU?
There will be pipe going from metal case (rig inside the case). In every case there will be holes for air intake and one for air outtake that connects to pipe that will go to this inline fan, that will get all the the heat from inside the case.
It's a big difference, almost no heat stays inside home.
This takes only around 80W of power.
If you have multipe rigs (every rig x 7 cards, 1000W+ power usage) then in summer with around 30+ degrees (celcius) outside, you can't stand in the room where rigs are and they get really high temperatures.
Thanks to this solution heat will go out the window and cards will be A LOT cooler.