The GREE Rio High-Efficiency Ductless Mini-Split Heat Pump system is compact quiet & provides unmatched comfort in any room. Without needing duct work installation is simple fast & cost effective. In addition The GREE Rio provides quiet comfort & improved efficiency by eliminating heat loss inefficiencies of conventional central air conditioning systems. Features & Benefits : High-Efficiency Inverter TechnologyEco-friendly R410A Refrigerant, Intelligent Defrost, Intelligent Pre-Heating, Comfortable Sleep ModeDry Anti-Mildew DesignTimer. How many BTUs do you need for your ductless split?(BTU ratings are estimates only based on 10ft ceilings with great9,000 BTU - 350 sqft | 12,000 BTU - 500 sqft | 18,000 BTU - 750 sqft | 24,000 BTU - 1,000 sqft | 30,000 BTU - 1,250 sqftWhich Line Set Kit Do You Need?This unit uses a 1/4" x 3/8" line set. Length is dependent on the needs of your project and how you will set up the system (distance from condenser to indoor air handlers). Our customer support team will provide assistance should you ever need to file a warranty claim with the manufacturer. Please be aware that only systems that are installed by a licensed HVAC contractor are backed by the warranty. Proof of licensed installation is required. The receipt/invoice from the contractor should be sufficient.