Trane ntxwst09b112aa Ductless Wall Mount Indoor Unit

Product Description

The TRANE ntxwst09b112aa is a ductless wall mount indoor unit designed for single-zone mini-split systems using R-410A refrigerant. Rated at 9,000 BTU/h (0.75 ton), this unit mounts directly to an interior wall and connects to a compatible outdoor condensing unit to deliver heating and cooling without ductwork. The slim profile measures 31.437 inches wide, 11.625 inches tall, and 9.125 inches deep, making it suitable for rooms where space along the wall is limited. Installation is performed by a licensed HVAC technician with EPA Section 608 certification to handle refrigerant.

This wall mount air handler is intended for residential and light-commercial single-zone ductless applications. It is well suited for additions, server rooms, sunrooms, garages, and other spaces that lack existing duct infrastructure. The 9,000 BTU/h capacity targets smaller rooms typically up to 350 to 400 square feet depending on local heat load conditions. The unit operates on R-410A refrigerant and pairs with a compatible TRANE or Mitsubishi outdoor unit as part of a matched mini-split system.

Key Features

• 9,000 BTU/h (0.75 ton) capacity for single-zone ductless cooling and heating
• R-410A refrigerant for compliance with current environmental standards
• Wall mount design eliminates the need for ductwork in the conditioned space
• Compact footprint: 31.437 inches wide by 11.625 inches tall by 9.125 inches deep
• Compatible with matched outdoor condensing units in a mini-split configuration

Compatibility

Designed as an OEM-style wall mount indoor air handler for ductless mini-split systems; confirm outdoor unit compatibility and matched system ratings before installation.

Installation Notes

Installation must be performed by a licensed HVAC technician holding EPA Section 608 certification for refrigerant handling. Power must be disconnected at the breaker before any wiring or mounting work begins. The indoor unit requires a properly sized wall penetration for the refrigerant line set, condensate drain, and control wiring to reach the outdoor unit. Follow all local mechanical codes and the manufacturer installation instructions for line set length limits and mounting height requirements.