The 4MXX8 indoor multi-split heating and cooling unit works as part of a ductless multi-split system. This ductless product can be mounted near the floor or ceiling and offers high-efficiency heating and cooling for precise comfort with no ductwork.


Ductless System

Composed of three main components—an indoor unit consisting of a coil and a fan, an outdoor compressor unit and a remote control—most ductless multi-split heating and cooling systems are connected by refrigerant lines and require no ductwork. The indoor multi-split heating and cooling unit can be mounted on the wall or in the ceiling.

Efficient Comfort

Trane’s ductless multi-split heating and cooling units have Seasonal Energy Efficiency Ratings (SEER) ranging from 16.00 to 22.00, making the systems remarkably efficient and environmentally friendly.

Quiet Operation

Specially designed air vents efficiently reduce sound to provide quiet comfort as low as 29 dB, for whisper-quiet operation.

Design Flexibility

Since there is no ductwork to install, it’s easy to add Trane’s reliable heating and cooling to any home, in any room desired. It’s an economical and efficient option for homes without an existing ducted system or when adding ductwork may be impractical or too expensive.



  • Every Trane ductless multi-split heating and cooling system consists of an indoor and an outdoor unit. Trane indoor units feature:

  • Specially designed air vent efficiently reduces operation noise to provide quiet comfort, as low as 29 dB.

  • Flexible installation options to meet different requirements. (Floor/ceiling units only).

  • The compact construction and simple structure make this ductless multi-split heating and cooling system easy to install and maintain.

  • To reduce moisture on the filter and provide fresh, healthy air into the room, clean the filter regularly with water.

  • Air is pre-heated during heating operation to prevent blowing cold air directly to the room.

  • You set the time for the unit to operate automatically when you want.

  • Each indoor multi-split heating and cooling unit is controlled with a wireless remote control (purchased separately) so you can easily control your system from anywhere in the room. The “I feel” function enables the system to sense temperature at the remote control, rather than a thermostat.

  • These floor/ceiling indoor units ship with a wired controller displaying temperature, operational mode, and time settings.