When you have a big household, Heating, Ventilation as well as A/C zone control is the way to go. This way, everyone has their own recognizable temperature control needs. Zone control is necessary in order to stop the fighting plus not break the bank! What this entails is ductless Heating, Ventilation as well as A/C setup. Each room in the home gets an indoor air handler plus temperature control, however the air handlers all link to 1 outdoor air compressor. Every room in the home can be a odd temperature doing it this way; no ductwork plus the individual temperature controls allow this to happen. The living room can have heavy AC, the bedroom high amounts of heating plus the office can be a middle ground temperature. No room is affected by the other 1 plus the tenant in each room is delighted. What our family does is meet in the middle for those rooms! Both of us call them community rooms plus the two of us decided the climate control for them. But, each bedroom is controlled by whoever owns it. Everyone is so much happier having their own space heated plus cooled to what they want… My mother lives with me–she likes to have high heating at night. My child wants to have AC basically on all day, everyday. I like to have no Heating, Ventilation as well as A/C running if possible. Believe it or not, it is better for utility bills doing this. Then rooms not in use get no Heating, Ventilation as well as A/C. Then people like me who don’t need AC in the summer time or lots of heating in the winter, save energy. When the two of us updated to the system, The bills severely decreased .