Trane M5MHWUN09A1N0A Wall Mount Indoor Air Handler 9000 Btu Ductless Mini-split

Product Description

The Trane M5MHWUN09A1N0A is a 9000 BTU wall-mount indoor air handler designed for ductless mini-split heat pump systems. Part of the Trane Value Series, this high-wall unit uses R-454B refrigerant and delivers continuously variable capacity when paired with a compatible outdoor condenser. System ratings include 24.0 SEER2, 13.0 EER2, and 10.0 HSPF2, meeting current efficiency standards for residential single-zone applications. The unit is AHRI certified and ETL listed as part of a tested system. Licensed HVAC technicians install this unit as the indoor half of a complete mini-split system.

The M5MHWUN09A1N0A is suited for residential single-zone ductless installations where a high-wall air handler is required. Typical applications include bedrooms, living spaces, additions, and other areas where ducted systems are impractical. This unit is designed to operate as part of a matched system with a corresponding Trane outdoor condenser. The companion outdoor unit model identified in available system data is M5THS2309A11NA. All efficiency ratings apply to the matched system configuration, not the indoor unit alone.

Key Features

• 9000 BTU capacity for single-zone residential ductless applications
• 24.0 SEER2 and 13.0 EER2 system cooling efficiency ratings
• 10.0 HSPF2 system heating efficiency for year-round heat pump operation
• R-454B refrigerant — current low-GWP refrigerant standard
• Continuously variable compressor staging for consistent temperature control when paired with a compatible condenser
• AHRI certified and ETL listed as part of a complete matched system

Compatibility

Designed for use with a compatible Trane outdoor condenser as part of a matched ductless mini-split system. System efficiency ratings of 24.0 SEER2, 13.0 EER2, and 10.0 HSPF2 are verified with the corresponding outdoor unit M5THS2309A11NA. Always confirm matched-system pairing before installation.

Installation Notes

Installation must be performed by a licensed HVAC technician holding EPA Section 608 certification for R-454B refrigerant handling. Shut off all electrical power to the system at the disconnect before beginning any work. The indoor unit requires wall mounting at a height appropriate for the room layout, with refrigerant line sets routed per the manufacturer specifications. Follow all applicable local mechanical codes and manufacturer guidelines for line set sizing, electrical connections, and condensate drainage.

Technical Specifications

• Cooling Capacity: 9000 BTU/h
• SEER2: 24.0
• EER2: 13.0
• HSPF2: 10.0
• Refrigerant: R-454B
• Unit Type: High-Wall Indoor Air Handler
• System Type: Ductless Mini-Split Heat Pump
• Certifications: AHRI Certified, ETL Listed

Standard Information

• Brand: Trane
• Manufacturer Part Number: M5MHWUN09A1N0A