[ENERGY EFFICIENT COOLING] Della 2 Zone 27000 BTU/h, 19 SEER2, 208-230V, ETL Listed, AHRI Certified pre-charged air conditioner unit features a ductless mini split inverter plus system with a heat pump (up to -4℉/-20℃) and DC Inverter technology provides up to 30% power savings. (This model does not support the Self-Cleaning Function. The option will still show on the display after pressing the self-cleaning button, the self-cleaning operation will not be performed.) [MULTIPLE ROOMS] Comes with 2 indoor air handlers 18,000 BTU + 18,000 BTU with separate controller for individual rooms and 1 outdoor condenser. Enjoy individual temperature controls in each room for ideal climate control. [AMPLE COVERAGE] This unit provides cooling and heating for up to 2000 Sq. Ft (each indoor unit recommended area 1000 Sq. Ft) and able to work in environments as low as 5 degrees Fahrenheit. 2 pcs 16ft copper pipes (Standard size 1/4" & 3/8" outer dimension) and 2 installation kits included. The length for drain pipe is 78.7". [STRONG SYSTEM] This air conditioner is designed with several smart functions that make it easy to use: 4D air flow(up-down left-right), I feel mode, 24 hour timer, sleep mode, eco energy saving mode, multiple fan speeds, turbo function, heating, cooling, dry and auto modes. Maximum Fuse Size is 20A. [QUIET OPERATION & INSTALLATION] This air conditioner is ultra silent at only 50 dBa. The unit provides equal airflow in every part of your room and can adjust to 60-90 degrees Fahrenheit to suit your comforts in just a few minutes.Line-set vacuuming is required during installation. Any alteration of line-set length requires adjusting freon levels.This system mandates professional installation – it's not a DIY mini split AC.