Hello,
interesting!
I’ve got here a similar situation but then with a ACM-LV10 with a Storkair comfofan for variable speed control(no programming skills 
atm)
I’ve made certain flows for co2 and humidity control (living:co2/shower humidity)
examples:
This works with presets, so I also can disable it for co2, when you’re alone/watching a movie or something else or set it on before you take a shower.
In the futere maybe a Zigbee 0-10v but till now it works always with Homey.
Works with Netatmo for co2 (also in future maybe a Zigbee device for that)
