3 Ton Goodman 14.5 SEER2 R32 A/C System GLXS4BA3610, AMST36CU1300
For the most common central air replacement size, this Goodman package matches the 36,000 BTU/h GLXS4BA3610 condenser with the AMST36CU1300 air handler (AHRI #214859638). It's the first size in the GLXS4B series with a scroll compressor, and at 67 dBA it has the lowest rated sound level in the lineup. That makes it a strong choice for homeowners whose condenser sits near a patio, bedroom window or neighbor's fence. It's R-32, rated 14.5 SEER2, and cooling only unless you add an optional heat kit.
Is a 3 Ton Air Conditioning System the Right Size?
Three tons, or 36,000 BTU/h, covers a wide range of mid-size homes. That's often around 1,500–1,800 sq. ft. as a loose rule of thumb, and it's the size many existing homes were originally built with. When a 3 ton unit is being replaced, it's worth confirming the original size was right. Insulation, windows and ducts may have been upgraded since the first system went in.
Two-story homes, big west-facing glass, high occupancy and hot, humid climates tend to push the load up. Shaded lots and modern building envelopes bring it down. A Manual J calculation paired with a duct check ensures the AMST36CU1300's airflow tap matches both the system and the home.
Ideal for: Mid-size single-family homes, 3–4 bedroom houses, two-story homes with moderate loads and replacements of original 3 ton systems.
Need more capacity? Step up to the 3.5 Ton Goodman R32 A/C System GLXS4BA4210, AMST42CU1300 for larger homes or layouts with heavy afternoon sun.
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 | GLXS4BA3610 — 3 Ton R32 Split System Air Conditioner |
|---|---|
| Indoor Air Handler | AMST36CU1300 Multi-Position ECM Air Handler (C Cabinet, 21" Wide) |
| Application | Cooling-Only Central Air Split System (Electric Heat Kit Optional) |
| Refrigerant | R-32 |
| Compressor | Single-Stage Scroll Compressor with Advanced Copeland® Technology |
| Metering Device | Factory-Installed Internal Thermal Expansion Valve (TXV) |
| Electrical | 208/230V, Single Phase, 60 Hz Condensing Unit — 17.8 MCA / 30A Max Overcurrent |
| Air Handler Electrical | 208/240V, Single Phase — 7.1 MCA / 15A Max Overcurrent (No Heat Kit) |
The GLXS4BA3610 stands 39-1/2" tall on a 29" x 29" footprint. It steps up to a 7/8" suction line, so your installer should confirm the existing line set before reuse. The AMST36CU1300 moves to the 21" C cabinet with an 8"-wide blower wheel, and at 49" tall it fits most closets and attic platforms. Need heat without strips? The 3 ton Goodman R32 heat pump system GLZS4BA3610 uses the same air handler. For a higher rated efficiency match, see the 3 ton GLXS4BA3610 paired with the AMST42CU1300.
Condensing Unit & Air Handler Features
GLXS4BA3610 Outdoor Condensing Unit
- 36,000 BTU/h nominal cooling capacity
- Single-stage scroll compressor with Advanced Copeland® Technology
- Lowest rated sound level in the GLXS4B series at 67 dBA
- High-density foam compressor treatment
- Factory charged with 69 oz. of R-32 for 15 ft. of tubing
- 3/8" liquid and 7/8" suction sweat service valves
- Enclosed contactor and high-pressure switch
- Extended-life capacitors
- Steel louver coil guard protects the condenser coil
- Hurricane-wind rated per 2023 Florida Building Code when anchored
AMST36CU1300 Multi-Position Air Handler
- 21" C cabinet with 10" x 8" blower wheel
- ¾ HP direct drive, multi-speed ECM motor
- Internal factory-installed TXV
- All-aluminum evaporator coil designed for R-32
- 21-1/8" depth for easier attic access
- Rigid SmartFrame™ cabinet with screw-less sides and back
- Tool-less access to a 19.5" x 20" filter
- Optional HHK0005 high humidity kit available
- Accepts HKTS electric heat kits from 3 kW up to 19 kW
- UL 60335-2-40 compliant with factory-installed R-32 sensor
Specifications & Manuals
Documentation includes GLXS4BA3610 expanded cooling data, AMST36CU1300 airflow tables by speed tap, heat kit electrical data, dimensional drawings and installation procedures.
Frequently Asked Questions
Why is 3 tons such a common residential AC size?
Many mid-size homes, especially 3–4 bedroom houses, have cooling loads that fall near 36,000 BTU/h. So 3 tons is one of the most frequently installed and replaced sizes. A load calculation still confirms whether your home truly needs it.
What changes from the 2.5 ton to the 3 ton GLXS4BA3610?
The GLXS4BA3610 switches from a rotary to a scroll compressor, adds 6,000 BTU/h and uses a 7/8" suction line. It's paired with the wider 21" C cabinet AMST36CU1300 instead of the 17.5" AMST30BU1300.
How quiet is the 3 ton GLXS4BA3610 compared to the rest of the line?
Goodman rates the GLXS4BA3610 at 67 dBA, the lowest sound rating of any GLXS4B condenser from 1.5 to 5 tons.
What cabinet width is the AMST36CU1300 and why does it matter?
It's a 21" C cabinet (19-13/16" actual width). Measure your closet, platform or return plenum before ordering, since an older 17.5" air handler may need transition work.
Does the AMST36CU1300 need a kit for downflow installations?
Yes. Goodman lists the DFKE-02 downflow kit for the AMST36CU1300. Upflow and horizontal installs don't require it.
Can I add a high humidity kit to the AMST36CU1300?
Yes. Goodman lists the HHK0005 high humidity kit for this air handler. It is useful for attic installs in humid climates.
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).
