Variable Air Volume (VAV) System A sophisticated system that reads the temperature in each room (zone) & increases or decreases the volume of air coming from the air conditioning unit to reach a set temperature in each room. Fully programmable with a control in every room (zone) UniPoint A simple, very affordable system with one master wall control that allows managed (programmable) air flow in up to 8 zones (rooms) When used properly this system (& all Zonemaster Systems) will create energy savings in air conditioning usage   MaxiPoint The UniPoint system with multiple (up to 4) wall controls that can be spread throughout the house. Very useful for 2 story buildings. UniPoint RF (Radio Frequency) A handheld, radio controlled UniPoint System that has all the features of the UniPoint and also added features such as full Zone Balancing to further refine and manage the air conditioning airflow through the house. Fully programmable.