Our home is a split level, with 5 floors - basement, den, kitchen, bedroom, master. Each of those floors is mostly open EXCEPT the bedroom floor, which is 4 separate rooms.
A HVAC contractor we got a quote from recommended a ductless system+heat pump with 3 indoor units. One on the kitchen floor, one on the bedroom floor, and one in the master.
What I don't understand is how a single unit on the bedroom floor would effectively heat or cool all 4 rooms on that floor. Most of those rooms have their doors closed all of the time, which would greatly hamper air circulation (and therefore temperature circulation). With the current AC, each floor has a vent, so it's not a big deal. But I don't understand how it would work with ductless.
Can a ductless system effectively cool a floor with multiple rooms if the rooms have their doors closed most of the time?