VMC and filtration class F9 - Electrostatic filters

[I Citro]

Ideally, it would even be necessary to have several air intakes depending on the operating phases of the VMC.
It's already a bit like what you do when you connect the VMC DF to a Canadian well ...
I placed my fresh air intake under the roof overhang on the north side so as not to suck in air overheated by the sun in summer.
But in winter, I could see an air intake on the south side to "preheat" by solar gain ...