Built for Apartments, Condos & Smaller Single-Zone Spaces
The 1.5 Ton Goodman GLXS4BA1810 wall-mount system pairs an 18,000 BTU R-32 condenser with the AWST18SU13 front-return air handler, designed for tight spaces where a vertical wall-mount handler is the practical fit. At 14.3 SEER2 on next-generation R-32 refrigerant, it delivers efficient, code-compliant cooling in a compact footprint.
Is a 1.5 Ton System the Right Size?
A 1.5 ton air conditioner produces 18,000 BTU, which generally suits spaces of roughly 600 to 900 square feet, depending on climate, insulation, ceiling height, sun exposure, and window count. In hot, humid regions like Florida, plan toward the lower end so the system runs long enough to remove humidity rather than short-cycling.
Good fit for: one or two-bedroom apartments and condos, garage conversions, in-law suites, additions, and zoned upstairs areas around 600–900 sq ft.
Need more capacity? Step up to the 2 Ton GLXS4BA2410 (24,000 BTU, 900–1,200 sq ft) →
Sizing rules of thumb are a starting point only. For an exact match we recommend a Manual J load calculation. Request free sizing help or call 813-885-7999.
What's Included
| Outdoor Condenser | Goodman GLXS4BA1810 — 1.5 Ton, 14.3 SEER2, R-32 |
|---|---|
| Indoor Air Handler | Goodman AWST18SU13 wall-mount, front or bottom return (small chassis) |
| Heat Strip Options | 5 kW (AWST18SU1305) or 8 kW (AWST18SU1308) factory pre-installed |
| Operating Mode | Cool only with electric heat strip |
| Cabinet Width | 20" |
| Refrigerant Charge | Factory charged for 15 ft of line set |
| Certification | AHRI #215214928 · ETL listed · UL 60335-2-40 |
Because the 1.5 and 2 ton AWST handlers use the small chassis, this unit supports either front or bottom return, giving more flexibility in tight closets and utility spaces than the larger front-return-only chassis.
Condenser & Air Handler Features
GLXS4B Condenser
- High-efficiency scroll compressor with Copeland CoreSense technology
- Copper tube / enhanced 5 mm aluminum fin coil
- Factory-installed filter drier and high-pressure switch
- Sweat-connection service valves with easy gauge-port access
- Architectural gray powder finish, 500-hour salt-spray tested
- Meets 2023 Florida wind-integrity code when properly installed
AWST Wall-Mount Air Handler
- Fully adjustable factory TXV
- Direct-drive multi-speed motor for airflow control
- Rust-resistant nickel-chromium heat elements (3/5/8/10 kW range)
- Factory-installed R-32 sensor rated for the life of the coil
- Low cabinet air leakage (under 1.4% at 0.5" H2O, ASHRAE 193)
- Pull-type disconnect; built-in filter rack (filter included)
Specifications & Manuals
Want the efficiency rules explained? Learn how SEER2 is measured →
Frequently Asked Questions
How many square feet will a 1.5 ton Goodman system cool?
A 1.5 ton system produces 18,000 BTU and typically cools about 600 to 900 square feet. In hot, humid climates aim toward the lower end so the unit runs long enough to remove humidity. Insulation, ceiling height, and sun exposure shift the real number, so a Manual J load calculation is the most accurate way to confirm.
What's the difference between this 1.5 ton unit and the 2 ton GLXS4BA2410?
The 1.5 ton GLXS4BA1810 delivers 18,000 BTU at 14.3 SEER2 for roughly 600–900 sq ft. The 2 ton GLXS4BA2410 delivers 24,000 BTU at 14.5 SEER2 for roughly 900–1,200 sq ft. Choose the 2 ton if your space is larger, has high ceilings, or gets strong afternoon sun.
What heat strip sizes are available with the AWST18SU13?
This 1.5 ton air handler is offered with a factory pre-installed 5 kW (AWST18SU1305) or 8 kW (AWST18SU1308) electric heat strip. The 5 kW suits milder climates; the 8 kW gives more backup heat for cooler areas.
What is R-32 refrigerant and why does this system use it?
R-32 is a next-generation, lower-global-warming-potential refrigerant that replaces R-410A under current EPA rules. It is more efficient to pump and needs less charge volume. This Goodman system ships with a factory-installed R-32 sensor and meets the latest refrigerant and efficiency regulations.
Can the AWST18SU13 air handler use a bottom return?
Yes. The 1.5 and 2 ton AWST units use the small chassis, which supports front or bottom return configuration. The larger 2.5 and 3 ton units are front-return only.
Is this system AHRI certified?
Yes. This GLXS4BA1810 and AWST18SU13 pairing is an AHRI-certified match under AHRI #215214928, and both components are ETL listed and UL 60335-2-40 compliant.
Click On Links Below For Specifications & Manuals:
GLXS4 Technical Specifications
GLXS Installation Manual
GLXS,GLZS Warranty Certificate
AWST Technical Specifications
AWST Installation Manual
AWST Warranty Certificate"SEER2" stands for Seasonal Energy Efficiency Ratio 2. Specifically, SEER2 is the total heat removed from the conditioned space during the annual cooling season. The M1 testing procedure will increase systems' external static pressure by a factor of five to better reflect field conditions of install equipment. With this change, new nomenclature will be used to denote M1 ratings (including EER2 and HSPF2).
