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Trane 5TWX5018A1000A – 18,000 BTU 1.5 Ton 15 SEER2 Single-Stage Split System Heat Pump
Deliver dependable year-round comfort with the Trane 5TWX5018A1000A, a 1.5-ton single-stage split system heat pump engineered for efficient heating and cooling performance in residential applications. As part of Trane’s 5TWX50 series heat pump platform, this R-454B system integrates a Climatuff® scroll compressor, Spine Fin™ outdoor coil, and durable weather-resistant cabinet construction to provide reliable comfort and long-term durability.
Single-Stage Climatuff® Scroll Compressor Performance
The 5TWX5018A1000A utilizes a Climatuff® scroll compressor with a single-stage configuration (1 – 1) designed for smooth and reliable heating and cooling operation. The compressor incorporates internal over-temperature and pressure protection along with a centrifugal oil pump design to support dependable startup, reduced vibration, and consistent performance over time.
1.5 Ton Heating & Cooling Capacity Platform
Model nomenclature identifies this unit as a 1.5-ton heat pump system (18 = 18,000 BTU nominal capacity) operating on 208/230V, 1-phase, 60 Hz electrical service. The system is certified under the AHRI Unitary Air-Conditioner Equipment Certification Program (Standard 210/240) and rated for sound performance per AHRI Standard 270.
Direct-Drive Outdoor Fan System
The outdoor fan assembly features a 23-inch propeller blade driven by a direct-drive single-speed motor (1/8 HP) operating at approximately 850 RPM. The fan delivers approximately 2,980 CFM airflow at 0.0 in. w.g., supporting efficient heat transfer and condenser performance during both heating and cooling operation.
Spine Fin™ All-Aluminum Outdoor Coil
The condenser coil incorporates Trane’s patented Spine Fin™ all-aluminum design with 1 row at 24 fins per inch and 18.75 sq. ft. of coil face area. This coil configuration improves heat transfer efficiency while offering corrosion resistance and long service life. Louvered cabinet panels protect the coil on all sides while allowing unrestricted airflow.
R-454B Refrigerant & Charging Specifications
The 5TWX5018A1000A operates with R-454B refrigerant and includes an approximate factory charge of 4 lb, 12 oz. Standard line set connections include 3/4″ O.D. gas and 5/16″ O.D. liquid lines, and the system uses a thermal expansion valve (TXV) refrigerant control with a 9°F subcooling charging specification.
Quiet Operation with AHRI-Rated Sound Performance
Designed for controlled outdoor sound levels, the 5TWX5018A heat pump carries a 71 dB(A) A-weighted sound power rating under AHRI Standard 270 test conditions, helping maintain quiet operation in residential environments.
Durable Cabinet Construction for Outdoor Installation
The outdoor cabinet is built from heavy-gauge galvanized steel with a weather-resistant powder-paint finish. Panels are engineered for outdoor exposure and tested to withstand 1,000 hours of salt-spray corrosion testing, ensuring long-term durability in demanding environments.
Operating Range & Low Ambient Cooling Options
As manufactured, the system provides cooling operation down to 55°F outdoor ambient. Optional accessories such as evaporator defrost controls and low ambient kits can extend cooling operation to 40°F, 30°F (with TXV), or as low as 20°F depending on configuration.
Engineered for Reliable Year-Round Residential Comfort
Ideal for smaller homes and light residential heating and cooling loads, the Trane 5TWX5018A1000A heat pump delivers dependable single-stage performance, durable Spine Fin™ coil construction, and efficient R-454B operation in a compact 1.5-ton split system platform built for consistent comfort and long-term reliability.



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