I now have one 100 mm exhaust fan 24/7 running to the outside. There is an 100 mm fresh air intake but the fan is not running, just passively letting air in. Earlier these were connected to the tent and started and stoppped depending on the temperature inside the tent. 

I didnt empty the humidifer yesterday and it was completely full just now.

And heating of the room of the room is now done with a proper thermostat.

There is a much more fresh feeling to thhe room now in my opinion.

Took some pictures with the phones if anyone want to have a look at trichomes.