gree 24,000 btu 18 seer ceiling cassette ductless mini split air conditioner heat pump 208/230v gree please note: mini-split systems must be installed by a state licensed hvac contractor for warranty eligibility.<br><br>which line set kit do i need?<br />this system uses (1) 3/8" x 5/8" line set. these are sold separately, and you can choose from our 15 ft, 25 ft, 35 ft, 50 ft, and 75 ft lengths. the length needed depends on the needs of your project and how you will set up the system (distance from outdoor condenser to indoor air handler).<br><br>can i install this myself?<br />while installation of a ductless split is much easier than a central air system, it's still much more advanced than installing a window unit or portable. furthermore, the manufacturer warranty is only valid if a licensed professional does the installation. so while it is possible to do the installation yourself, we strongly recommend you hire an hvac professional in your area.<br><br>is this backed by a warranty?<br />yes, this system comes backed by a warranty from the manufacturer, not comfortup. we are an authorized online seller of these systems and can assist you with any questions you may have regarding the warranty process. *please note, all of our manufacturers require that the installation must be done by a state licensed hvac contractor in order to be eligible for the warranty. proof of hvac licensed installation will be required so please be sure to keep all receipts. hvac contractors will need to be involved for any warranty troubleshooting and/or repairs. labor is not included in the manufacturers warranty. comfortup does offer an extended warranty option that includes labor and can also extend parts coverage beyond the manufacturers listed timeframe. for more information on the extended warranty option.