Trane M5THS2312A11NA 12 Mbh R-454B Ductless Mini-split Outdoor Heat Pump Unit 23 Series

Product Description

The Trane M5THS2312A11NA is a 12 MBH single-zone ductless mini-split outdoor heat pump unit from the 23 Series lineup, designed for residential and light-commercial zoned comfort applications. This inverter-driven unit uses R-454B refrigerant, a low-GWP next-generation refrigerant that aligns with current and emerging regulatory standards. The outdoor unit pairs with a compatible indoor air handler to deliver both heating and cooling from a single system. Licensed HVAC technicians handle installation, commissioning, and refrigerant work on this equipment.

The M5THS2312A11NA is rated for single-zone ductless split applications and is part of the RunTru 23U Series, which is ENERGY STAR certified. It is suited for residential installations where a dedicated zone of heating and cooling is needed without ductwork. Typical applications include additions, converted spaces, multi-family units, and room-by-room zoning retrofits. The unit operates on 208-230V/60Hz/1-phase power. Liquid line connection is 1/4 inch and gas line connection is 3/8 inch, consistent with 12 MBH class mini-split piping.

Key Features

• 12 MBH (12,000 BTU/h) capacity in a single-zone ductless configuration
• R-454B refrigerant — low global warming potential, next-generation refrigerant
• Inverter-driven compressor for variable-speed operation and efficient part-load performance
• ENERGY STAR certified under the RunTru 23U Series program
• 208-230V/60Hz/1-phase electrical supply
• 1/4 inch liquid line and 3/8 inch gas line connections

Compatibility

This outdoor unit is part of the RunTru 23U Series ductless platform and is designed to pair with a compatible 23 Series indoor air handler in a single-zone mini-split configuration. Consult Trane or RunTru system pairing documentation to confirm the matched indoor unit before ordering.

Installation Notes

Installation must be performed by an EPA 608-certified HVAC technician, as this unit contains regulated refrigerant (R-454B) and requires proper handling, evacuation, and leak testing procedures. Power must be disconnected at the disconnect box before any service or connection work begins. Line set routing, mounting location, and piping lengths must comply with the manufacturer installation manual and local mechanical codes. Do not exceed the maximum piping length or elevation change specified in the system documentation, as these limits affect system performance and warranty.

Technical Specifications

• Capacity: 12 MBH (12,000 BTU/h)
• Refrigerant: R-454B
• Voltage: 208-230V / 60 Hz / 1-phase
• Liquid Line Connection: 1/4 inch
• Gas Line Connection: 3/8 inch
• System Type: Single-zone ductless mini-split heat pump
• Series: 23 Series (RunTru 23U)
• Certification: ENERGY STAR

Standard Information

• Brand: Trane
• Manufacturer Part Number: M5THS2312A11NA