Ductless A/C Heater Combo in an Open Floor Plan Home

[joeekaitis]

 

We put a ductless system in our open floor plan 1970s home.  Closing off the kitchen/family room where we spend the most time isn't practical, so is it best to turn on both head units or just the unit in an occupied space?

 

Thanks.

 

[DADoES]

 
I say whatever is minimal-necessary to provide the desired comfort.