Does this unit need to mount through wall or is it ductless?

Thank you for your question. This particular product is only the indoor air handler. To view our selection of floor mounted systems that contain both the condenser and air handler(s)Click HereThis is a ductless system as it does not use traditional ductwork. However, in order to function this indoor unit must be connected to an outdoor condenser. The indoor and outdoor units will be connected to each other via a refrigerant line set and control wire. The control wire will deliver power from the outdoor unit to the indoor as well as transmit electrical signals between the two units. The refrigerant line set is to transmit the refrigerant to an from the units. A hole will have to be drilled in the wall so that this line set can pass from the indoor unit to the outdoor unit. For more assistance, please give us a call.