Yeah, location matters a ton. I have 2 Awair Elements and we ran them in different places until we knew what "normal" looked like, then move them on.

Because of what I saw in my house we switched from a gas stove/oven to electric induction, installed an air exchanger and set our central air/heat to recirculate more often (only important for us during spring and fall when we aren't heating or cooling much).

I don't like noise when sleeping, so I liked the bedroom door shut. CO2 gets way too high, so I switched to using an earplug and leaving the door open more.

It is so nice to have the data, make informed choices and see measurable results.