Features: 1. Safety:water and electric separately. 2. Using complete free hot water when the unit is operating at cooling model, super energy-saving and environment protection! 3.Five models are available, hot water, heating, hot water+heating, cooling+hot water, cooling. 4.Convenient: intelligent remote controller, with simple key operation.Displays error code when having problem, easy for maintenance. 5.Multiple protections for the whole heat pump, guaranteeing safe operation. 6.World famous brand compressor, 4-way valve, motor, pcb, heat exchanger used to ensure top quality an high efficiency. 7. All weather operation: stable operation without being influenced by weather. 8.Metal case and stainless steel case are available, r22, r407c, r410a, r417a, r134a are for optional. 9.Metal case water tank with powder coating or stainless steel case are available. 10.Water flow switch equiped for water flow protection. 11.Simple installation: rooftop, balcony, yard or basement can be suitable places for the installation. 12.Quiet: special design for motor and fan to decrease noise, no disturbance to owners and neighb ours.