Trane 5TMM5B0A30M21S Wall Mount Air Handler 18000-30000 Btu/h 2.5 Ton R-454B Upflow

Product Description

The Trane 5TMM5B0A30M21S is a wall-mount air handler built for residential split-system cooling applications using R-454B refrigerant. It delivers 18,000 to 30,000 BTU/h of cooling capacity — covering the 1.5- to 2.5-ton range — and operates on a 208-240/1/60 electrical supply with 24-volt system control. The cabinet features an all-aluminum plate fin slab coil and is configured for upflow-only operation. This unit is rated for air conditioning use only and is not compatible with heat pump applications. Licensed HVAC technicians install and commission this equipment as part of a matched split system.

The 5TMM5B0A30M21S is designed for wall-mount installation in residential closets, utility rooms, and alcoves. Its 20.5-inch cabinet width suits tight mechanical spaces common in smaller homes, condominiums, and apartments. The upflow-only configuration means supply air exits from the top of the unit. Optional electric heater kits — 5, 7.5, and 10 kW single-phase units with integrated circuit breakers — are available as accessories for installations that require supplemental heat. This air handler is intended for pairing with a matched outdoor condensing unit in a standard split-system arrangement.

Key Features

• R-454B refrigerant compatible — supports low-GWP refrigerant requirements in new installations
• All-aluminum plate fin slab coil construction for corrosion resistance and heat transfer efficiency
• 18,000 to 30,000 BTU/h capacity range covering 1.5 to 2.5 tons of cooling
• 24-volt system control interface for standard thermostat wiring
• 208-240/1/60 single-phase power input
• Rated for air conditioning only — not approved for heat pump operation
• Wall-mount cabinet fits closets, alcoves, and utility rooms at 20.5 inches wide

Compatibility

Designed for use in residential split-system cooling installations paired with a compatible R-454B outdoor condensing unit. Rated for AC-only configurations; not for use with heat pump outdoor units. Optional single-phase electric heater kits (5, 7.5, and 10 kW) are compatible accessories for this unit.

Installation Notes

Installation must be performed by a licensed HVAC technician and must comply with all applicable national, state, and local codes. Disconnect and lock out all electrical power before servicing the unit. Refrigerant handling requires EPA Section 608 certification, as this unit uses R-454B, a mildly flammable (A2L) refrigerant subject to specific handling and containment requirements. Verify the upflow orientation and wall-mount structural support requirements before securing the cabinet.