Pioneer brand ductless INVERTER mini split air conditioning systems are well known all over the world for their quality and performance. Although, a little known in the North America, ductless mini splits have been the system of choice in most countries and regions all over the world, due to their simplicity, versatility and cost effectiveness. Installation of a Pioneer mini split system is a breeze. With a Pioneer ductless mini split air conditioning system, it is possible to heat or cool each room in a house, totally independent of the other, quietly, effectively and efficiently. Pioneer brand WYB series ductless INVERTER split heat pump systems come in 5 different capacities; 9000, 12000, 18000, 24000.and 36000 BTU/Hour. WYB is the most efficient INVERTER model in the Pioneer model line up. Included wireless remote controller allowing the users easily select among the 4 operating modes; Cooling, Heating, Dehumidification and Ventilation. Additionally an automatic switchover mode is available for totally automatic operation through its on board computer. A timer function allows the user to set the system to start or stop running at a certain time. Night mode function automatically adops the temperature settings to the human body's naturally changing temperature levels during the night. Auto restart function memorizes all settings in case of a temporary power failure and restarts the system to continue running the same way after the power is reconnected. Last but not the least, an automatic swing discharge air louver gently changes the direction of the air flow in a sweeping action for total comfort. With the ever increasing popularity of ductless mini split systems, there are many unknown brands trying to penetrate the market. Buyers interested in a ductless split heat pump are encouraged to consider buying a reputable brand, such as Pioneer, to be assured of their top quality and performance.