[christkv]

Make sure you office is the smallest room and get a space heater to keep it at your desired temprature

[zajio1am]

If your office is the smallest room, then you get fast to high CO2 concentration in the office.

[ice3]

My office is in fact the smallest room, just enough for a table, a chair and my homelab (a bunch of rPIs, some network equipment, a few servers).

All the electronics keep the room relatively warm, so most of the heating is actually turned off in that room :)