Goodman - 1.5 Ton/18,000 BTU Wall Mount Air Handler With Built-In 8kW Heater - 230V - R32 - AWST18SU1308
Goodman air handlers are an integral part of finishing a total home environment control system. The AWST plays a key role in reducing indoor humidity to create a much more comfortable environment. In addition, the AWST works with a multi-speed ECM motor to efficiently move cooled or warmed air throughout your home at exactly the speed you need.
Features
- AWST Models: Equipped with a fully adjustable TXV
- Designed for use with R-32 Refrigerant
- Direct-drive, multi-speed motors allows air volume variation for heating/cooling
- Sequence-controlled, rust-resistant nickel chromium heating elements of 3, 5, 8, and 10 kW
- Aluminum tubing coils on all models
- Factory-installed pull-type disconnect
- Factory installed R-32 sensor designed for the lifespan of the coil.
- Thermoplastic drain pan with bottom primary and secondary drain connections
- Built-in filter rack (filter included)
- Large chassis (2.5- and 3-ton units) front return only
- Small chassis (1.5- and 2-ton units) front or bottom return
- Wall-hanging bracket provided
- AHRI Certified; ETL Listed
Specifications
| Model Number(s) |
AWST18SU1308 |
| Brand |
Goodman |
| Category |
Air Handlers |
| Ton |
1.5 Ton |
| Voltage |
208/230V |
| Electrical Phase(s) |
1-Phase |
| Amp(s) |
30 |
| Blower |
Multi-Speed |
| Suction Valve Size (Inches) |
3/4 |
| Liquid Valve Size (Inches) |
3/8 |
| Height (Inches) |
36 |
| Width (Inches) |
21 |
| Depth (Inches) |
16 1/8 |
| UPC # |
663051683648 |
Manual
What our Experts Think
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8 kW Built‑In Electric Heater – Integrated heating adds supplemental warmth without a separate furnace, perfect for shoulder seasons or mild climates where extra heat helps balance comfort.
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Wall‑Mount Installation – Space‑saving vertical design ideal for apartments, condos, bonus rooms, or areas with limited floor space.
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1.5 Ton / 18,000 BTU Capacity – Sized for small to medium residential spaces, delivering balanced airflow for R‑32 heat pump or AC systems.
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R‑32 Refrigerant Optimized – Engineered around modern, lower‑impact R‑32 refrigerant for better efficiency and reduced environmental footprint.
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Multi‑Speed ECM Blower Motor – Electronically commutated motor enhances adjustable airflow, quieter operation, and better humidity control than standard PSC motors.
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Adjustable TXV (Thermal Expansion Valve) – Helps stabilize refrigerant flow for consistent performance and improved efficiency.
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Low Air Leakage Cabinet – Tight construction minimizes energy losses and supports more efficient indoor airflow.
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Easy Filter Access & Maintenance – Convenient access to the built‑in filter rack and service components simplifies routine upkeep.
Q&A
Q: What type of unit is the Goodman AWST18SU1308?
A: It’s a 1.5 ton wall‑mount indoor air handler designed for ducted systems, with built‑in 8 kW electric heat and compatibility with modern R32 refrigerant systems.
Q: What applications is it best suited for?
A: Ideal for small homes, apartments, condos, or multi‑family units, especially where space‑saving wall‑mount installation and supplemental heat are needed.
Q: What are the primary performance features?
A:
• 18,000 BTU nominal capacity matched to 1.5 ton cooling load.
• Direct‑drive multi‑speed ECM blower motor — for quieter operation and flexible airflow control.
• Fully adjustable TXV (thermal expansion valve) for improved cooling efficiency.
Q: How does the built‑in heater improve comfort?
A: The 8 kW electric heater provides reliable supplemental heat during cooler weather without a separate furnace, ideal in milder climates or as auxiliary heat.
Q: What installation orientation and voltage does it require?
A: Designed for vertical wall or stud mounting with 208/230 V single‑phase (60 Hz) power, making it suitable for standard residential electrical setups.
Maintenance Tips
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Replace Air Filters Every 1–3 Months: Maintains airflow, protects the blower motor, and ensures efficient heating and cooling.
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Keep Surrounding Area Clear: Remove dust, debris, or obstructions around the unit for proper airflow and safe operation.
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Inspect Condensate Drain: Ensure the drain line is clear to prevent water buildup and potential system damage.
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Check Electrical Connections: Periodically inspect wiring and connections for wear or corrosion to support the 8kW heater safely.
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Monitor Built-In Heater Function: Verify proper heater operation during heating cycles for safe and consistent performance.
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Schedule Annual Professional Maintenance: Technicians should inspect the blower motor, coils, refrigerant lines, and overall air handler operation yearly.
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Listen for Unusual Signs: Strange noises, odors, or airflow changes should be addressed promptly to prevent larger issues.
Damage 
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