1.5 Ton Goodman 15 SEER2 R32 A/C System GLXS4BA1810, AMST24BU1300
This is the smallest system in the Goodman GLXS4B R32 lineup. It pairs the 18,000 BTU/h GLXS4BA1810 outdoor condenser with the AMST24BU1300 multi-position ECM air handler, and the two are AHRI certified together (AHRI #215214926). It suits homeowners, landlords and HVAC contractors replacing central air in a compact home, condo, apartment or addition. It uses lower-GWP R-32 refrigerant and a factory-installed TXV, and it's built for cooling-only installs. You can add optional electric heat strips for backup heat.
Is a 1.5 Ton Air Conditioning System the Right Size?
A 1.5 ton system delivers 18,000 BTU/h of nominal cooling. It's meant for spaces with a light cooling load, not just a small floor plan. As a rough starting point, it often fits small homes, condos and apartments in the 600–900 sq. ft. range. The number that matters is the home's calculated heat gain.
Sizing depends on several factors: attic and wall insulation, window area and sun exposure, local design temperatures, air leakage, ductwork condition and how many people live there. An oversized system short-cycles and leaves humidity behind, which is a real problem in Florida and Gulf Coast homes. An undersized one runs nonstop on the hottest afternoons. A Manual J load calculation is the best way to confirm that 1.5 tons is right.
Ideal for: Condos, apartments, small single-story homes, finished bonus rooms, in-law suites and tight-envelope new construction with low cooling loads.
Need more capacity? Step up to the 2 Ton Goodman R32 A/C System GLXS4BA2410, AMST24BU1300 for homes with more sun exposure, extra rooms or a higher heat load.
Recommended home sizes are general guidelines only. Actual system requirements depend on insulation, climate, windows, ductwork, occupancy and a proper load calculation. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Outdoor Condensing Unit | GLXS4BA1810 — 1.5 Ton R32 Split System Air Conditioner |
|---|---|
| Indoor Air Handler | AMST24BU1300 Multi-Position ECM Air Handler (B Cabinet, 17.5" Wide) |
| Application | Cooling-Only Central Air Split System (Electric Heat Kit Optional) |
| Refrigerant | R-32 |
| Compressor | Single-Stage Rotary Compressor with Advanced Copeland® Technology |
| Metering Device | Factory-Installed Internal Thermal Expansion Valve (TXV) |
| Electrical | 208/230V, Single Phase, 60 Hz Condensing Unit — 10.9 MCA / 15A Max Overcurrent |
| Air Handler Electrical | 208/240V, Single Phase — 5.8 MCA / 15A Max Overcurrent (No Heat Kit) |
The GLXS4BA1810 is a compact outdoor unit at 26" W x 26" D x 27" H and 117 lbs. It's easy to set on a small pad or a condenser wall mount or stand next to a townhome or condo. Indoors, the 45"-tall AMST24BU1300 fits a closet, attic or crawlspace in upflow or horizontal position. Its ¾ HP multi-speed ECM blower lets your installer match airflow to the ductwork. If you only need the outdoor side, the 1.5 ton GLXS4BA1810 condenser is also sold separately.
Condensing Unit & Air Handler Features
GLXS4BA1810 Outdoor Condensing Unit
- 18,000 BTU/h nominal cooling capacity
- Single-stage rotary compressor with Advanced Copeland® Technology
- High-density foam compressor treatment
- Factory charged for 15 ft. of tubing (53 oz. R-32)
- Copper tube / enhanced aluminum fin coil with 5 mm tubing
- Factory-installed filter drier and high-pressure switch
- Sweat connection service valves with easy gauge-port access
- 3/8" liquid and 3/4" suction line connections
- Architectural Gray powder paint with 500-hour salt-spray approval
- Meets 2023 Florida Building Code hurricane wind requirements when properly anchored
AMST24BU1300 Multi-Position Air Handler
- Internal factory-installed thermal expansion valve
- Direct drive, multi-speed ECM blower motor (¾ HP)
- All-aluminum evaporator coil optimized for R-32
- Factory-installed R-32 refrigerant sensor
- Rigid SmartFrame™ cabinet with upflow or horizontal configuration
- Cabinet air leakage under 2.0% at 1.0" H₂O (ASHRAE 193)
- Foil-faced insulation reduces cabinet condensation
- DecaBDE-free thermoplastic drain pan with secondary drain connections
- Tool-less filter access (16" x 20" filter)
- Accepts field-installed HKTS electric heat kits from 3 kW up to 15 kW
Specifications & Manuals
Product documentation includes condenser and air handler specifications, electrical data, dimensions, airflow tables, heat kit data and installation instructions for the GLXS4BA1810 and AMST24BU1300.
Frequently Asked Questions
What size home is the 1.5 ton GLXS4BA1810 system suited for?
It's built for spaces with a light cooling load, like condos, apartments, additions and small, well-insulated homes. Many of these land around 600–900 sq. ft., but a load calculation should confirm the size for your climate and construction.
How does the GLXS4BA1810 compare to the 2 ton GLXS4BA2410?
Both condensers share the same 26" x 26" x 27" cabinet, rotary compressor type and AMST24BU1300 air handler. The GLXS4BA1810 is rated for 18,000 BTU/h and the GLXS4BA2410 for 24,000 BTU/h. The 1.5 ton suits smaller loads where a 2 ton would short-cycle.
Does the AMST24BU1300 air handler include electric heat?
No. The "00" in the model number means no factory electric heat. Goodman HKTS heat kits from 3 kW up to the HKTSD15 are field installed and sold separately.
What breaker size does the GLXS4BA1810 condenser need?
Goodman lists a minimum circuit ampacity of 10.9 and a maximum overcurrent protection of 15 amps, using time-delay fuses or HACR-type breakers. Always check the unit's rating plate and local code.
Can this 1.5 ton R32 system fit in a closet or attic?
Yes. The AMST24BU1300 is 45" tall and 16-5/16" wide in the 17.5" B cabinet. It installs vertically in a closet or horizontally in an attic or crawlspace, and a DFKE-02 kit is available for downflow.
Is there a heat pump version of this 1.5 ton system?
Yes. If you want efficient electric heating instead of heat strips, see the 1.5 ton Goodman R32 heat pump system GLZS4BA1810.
GLXS4 Technical Specifications
GLXS Installation Manual
AMST Technical Specifications
AMST Installation Manual"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).
