The JHVV Air Handler model line offers the ultimate in comfort, low sound and application flexibility. This unit can be used in upflow, downflow, horizontal right and horizontal left applications with no additional parts or kits. All JHVV air handlers employ a high efficiency ECM variable speed, constant CFM blower motor and a factory mounted EEV valve. The JHVV product line is specifically designed to match with the YZV and YXV high-efficiency variable capacity outdoor units. The JHVV is designed to work as part of a 4-wire communicating system which employs the Hx Wi-Fi Thermostat for control.