The Quantum Series is WhisperKOOL's newest and most advanced cooling system. This fully ducted split system comes in one size - 12000 BTUs. Utilizing 404A refrigerant, it has the built-in capacity to be installed outside in cold weather climates where temperatures get as low as minus 15 degrees. Simple to install by a certified technician, our pump down technology does not require any wiring from the condenser to the evaporator. Featuring interchangeable panels which allow the installer to direct the air flow in the most efficient direction to maintain maximum efficiency.