Required but not included : 1/4" x 1/2" line set. Sold separately and you can choose from our 15ft, 25ft, and 50 ft lengths. The Evo+ High Efficiency Ductless Mini-Split Air Conditioning System delivers affordable heating & cooling with unmatched comfort. The Evo+ does not require bulky ductwork so installation is simple fast & cost effective. ; In addition it is more efficient by eliminating heat loss common with conventional central air conditioning systems. Features & Benefits : Eco-friendly R410A Refrigerant, Photocatalytic Filter, I-Feel Automatic Function, Intelligent Defrost, Intelligent Pre-Heating, Timer. BTUs needed : 9,000 BTU - 350 sqft | 12,000 BTU - 500 sqft | 18,000 BTU - 750 sqft | 24,000 BTU - 1,000 sqft | 30,000 BTU - 1,250 sqft | 36,000 BTU - 1,500 sqft. | 42,000 BTU - 1 750 sqftYes it comes fully backed by a manufacturer's warranty and ComfortUp is an authorized online seller of these systems. 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.