Trane M3THS2212A91NA Ductless Mini-split Heat Pump Outdoor Unit 12000 Btu/h 22 Seer 115V Single Zone

Product Description

The Trane M3THS2212A91NA is a single-zone ductless mini-split heat pump outdoor unit rated at 12,000 BTU/h cooling capacity and 22 SEER efficiency. Operating on 115 volts, 60 Hz, single-phase power, this unit uses R-32 refrigerant and is designed for residential ductless heating and cooling applications. It functions as the outdoor condensing and compressor section of a complete split system, paired with a compatible indoor air-handling unit. Licensed HVAC technicians handle the refrigerant connections, electrical hookup, and system commissioning for this type of installation.

This outdoor unit is suited for single-zone residential applications where a traditional ducted system is impractical or unavailable — such as room additions, garages, sunrooms, or retrofits. The 115-volt single-phase power requirement makes it compatible with standard residential electrical service without requiring a dedicated 208/230-volt circuit. The unit is part of the RunTru ductless product line and is available in the 12,000 BTUH capacity class. Based on available data, compatible indoor units include the M3MHW2212A9N0A air handler. Quiet operation is a noted characteristic of this model series, with sound levels reported in the 28 to 36 dB range.

Key Features

• 12,000 BTU/h cooling capacity in a compact single-zone outdoor configuration
• 22 SEER efficiency rating, meeting and exceeding regional minimum efficiency standards
• 115V/60Hz/1-phase power supply compatible with standard residential circuits
• R-32 refrigerant with lower global warming potential compared to R-410A
• Quiet operation with reported sound levels between 28 and 36 dB
• Available for installation in all U.S. regions at 18 SEER or higher

Compatibility

Compatible indoor air handler: M3MHW2212A9N0A. This unit is designed for single-zone ductless mini-split system installations. Verify full system compatibility with Trane or RunTru product documentation before ordering.

Installation Notes

Installation must be performed by a licensed HVAC technician certified to handle R-32 refrigerant under applicable EPA Section 608 regulations. Disconnect and lock out all electrical power before servicing any component. Refrigerant line sets, electrical connections, and unit placement must comply with local mechanical and electrical codes, including NEC requirements for outdoor disconnect and overcurrent protection. Do not attempt to recharge or recover refrigerant without proper recovery equipment rated for R-32.

Technical Specifications

• Cooling Capacity: 12,000 BTU/h
• SEER: 22
• Voltage: 115V/60Hz/1-phase
• Refrigerant: R-32
• System Type: Single-Zone Ductless Heat Pump Outdoor Unit
• Max Overcurrent Protection: 25 amps
• Liquid Line Size: 1/4 inch
• Gas Line Size: 3/8 inch
• Sound Level: 28 to 36 dB

Standard Information

• Brand: Trane
• Manufacturer Part Number: M3THS2212A91NA