Trane M5THS1918A11NA Ductless Heat Pump Condenser 18000 Btu/h 19 Seer R-454B 208-230V 1-phase

Product Description

The Trane M5THS1918A11NA is an 18,000 BTU/h outdoor condensing unit for a ductless mini-split heat pump system, operating on R-454B refrigerant at 208-230 volts, single phase. Part of the Trane RunTru ductless lineup, this unit delivers 19 SEER efficiency and provides both cooling and heating in a single outdoor unit. It is designed for residential and light-commercial applications where a ducted system is impractical or unavailable. Licensed HVAC technicians handle installation and commissioning of this equipment.

The M5THS1918A11NA is suited for residential spaces such as room additions, garage conversions, sunrooms, and multi-zone applications where zoned comfort control is needed without existing ductwork. The unit pairs with a compatible Trane RunTru indoor wall-mount air handler to complete the split system. One compatible indoor unit is the M5MHWUN18A1N0A. The system is appropriate for single-zone residential heat pump installations in moderate to cold climates, with a stated heating operating range down to -13 degrees F.

Key Features

• 18,000 BTU/h cooling capacity at 19 SEER efficiency rating
• R-454B refrigerant — a lower-GWP, A2L next-generation refrigerant replacing R-410A
• Single-phase, 208-230 volt power supply for standard residential electrical service
• Heat pump operation provides both heating and cooling from a single outdoor unit
• Heating operation rated down to -13 degrees F outdoor ambient temperature
• Ductless outdoor condenser design for flexible placement and minimal structural modification

Compatibility

Designed for use with a compatible Trane RunTru 18,000 BTU ductless indoor air handler, such as the M5MHWUN18A1N0A, to form a complete ductless heat pump split system. Verify indoor unit compatibility with Trane product documentation before ordering.

Installation Notes

Installation must be performed by an EPA Section 608 certified HVAC technician familiar with A2L refrigerant handling procedures, as R-454B is a mildly flammable refrigerant class. De-energize the disconnect and follow lockout/tagout procedures before any service work. The outdoor unit requires a level, structurally sound pad or wall-mount bracket and adequate clearance on all sides per manufacturer specifications. Follow all applicable local mechanical and electrical codes, including NEC requirements for disconnect sizing and wiring.

Technical Specifications

• Cooling Capacity: 18,000 BTU/h
• SEER Rating: 19
• Refrigerant Type: R-454B
• Voltage: 208-230 volts
• Phases: 1
• Heating Operating Temperature Range: -13 to 75 degrees F
• Liquid Line Size: 0.25 inches
• Unit Type: Outdoor Condenser (ODU)
• System Series: RunTru 19 Series

Standard Information

• Brand: Trane
• Manufacturer Part Number: M5THS1918A11NA