Installing a ductless central air-conditioning system which allows you to vary room temperatures in different rooms can cut your utility bills and improve your comfort over a standard system. There is no need to keep bedrooms very cool during the day or the living or dining rooms cool overnight.
A ductless system works in a similar manner to a standard ducted central air conditioner. There is a small compressor unit located outdoors on the ground or mounted against a wall.
Instead of having pipes with the cooling refrigerant connected to the heat pump or furnace blower duct system in the utility room, attic or basement, they are attached to a mini-cooling blower unit in a room(s). Only a three-inch-diameter hole needs to be drilled through the wall for the pipes.
The individual indoor blower units can be mounted on the ceiling or high on a wall. They are typically only about three feet long, one foot high and very shallow so they are not readily noticeable. Some other designs can be recessed into the ceiling or hidden away in a corner near the ceiling.
These indoor blower units are not noisy like window air conditioners because the compressor is located far away outdoors.
A dual- or three-zone system should adequately cool most homes. This is similar to having two or three separate small central air conditioners, each with its own adjustable thermostat. Although cool air naturally circulates throughout all the rooms in your home, you still can cool some areas more than others to realize savings from zone cooling.[/B]
I actually have to get 3 units installed which will cover 8 rooms and have 6 wall units. Each wall unit can be set at a different temp which is great when some of like it freezing and others just like it cool. lol
here is a picture showing one vent with one unit. The perspective is off though because the wall unit would be much smaller in relation to that guy. I have one unit covering the living room/dining room and kitchen. Another unit going to 2 bedrooms and a third unit going to the other 3 bedrooms.