3 Ton Goodman 15.2 SEER2 R32 A/C System GLXS4BA3610, AMST42CU1300
This is the high-efficiency 3 ton match in the GLXS4B family. It combines the 36,000 BTU/h GLXS4BA3610 scroll-compressor condenser with the 42,000 BTU/h-rated AMST42CU1300 air handler for a 15.2 SEER2 rating under AHRI certificate #214859637. It's aimed at homeowners replacing one of the most common system sizes who want lower rated energy use than the standard 3 ton pairing. The quiet 67 dBA condenser is a bonus. It uses R-32 refrigerant, and it's cooling only with optional field-installed electric heat.
Is a 3 Ton Air Conditioning System the Right Size?
Capacity stays at 3 tons (36,000 BTU/h). The upsized indoor coil only raises the efficiency rating, so sizing follows the same rules as any 3 ton system. As a very rough guide, that's often homes around 1,500–1,800 sq. ft. A load calculation is what should confirm the choice.
If your current 3 ton system kept the house comfortable without long run times or clammy air, 3 tons is likely still right. That's especially true if insulation, windows and ducts haven't changed. If you've added rooms, replaced windows or sealed the attic since the last install, run a fresh Manual J before ordering.
Ideal for: Mid-size 3–4 bedroom homes, two-story homes with moderate loads and replacements of original 3 ton systems by efficiency-focused owners.
Need more capacity? Step up to the 3.5 Ton Goodman 15.2 SEER2 R32 A/C System GLXS5BA4210, AMST42CU1300 for larger homes at the same efficiency level.
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 | AMST42CU1300 Multi-Position ECM Air Handler (C Cabinet, 21" Wide) |
| Application | High-Efficiency Cooling-Only 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 — 5.9 MCA / 15A Max Overcurrent (No Heat Kit) |
The GLXS4BA3610 condenser stands 39-1/2" tall on a 29" x 29" base, weighs 158 lbs and runs on 3/8" liquid and 7/8" suction lines. The AMST42CU1300 air handler shares the 21" C cabinet width with the AMST36CU1300 in the standard 14.5 SEER2 3 ton system. It's taller, though, at 53-7/16" versus 49", which gives it room for the larger coil behind the 15.2 SEER2 rating. For in-wall closet installs, there's also the 3 ton Goodman R32 central wall mount system.
Condensing Unit & Air Handler Features
GLXS4BA3610 Outdoor Condensing Unit
- 36,000 BTU/h nominal cooling capacity
- Scroll compressor with Advanced Copeland® Technology
- 67 dBA rated sound level, the quietest GLXS4B condenser
- High-density foam compressor treatment
- 69 oz. factory R-32 charge for 15 ft. of tubing
- 7/8" suction and 3/8" liquid sweat service valves with gauge ports
- Factory-installed filter drier
- Single-panel control access with space for field accessories
- Removable grille-style top, UL 60335-2-40 compliant
- 10-year parts limited warranty with online registration within 60 days
AMST42CU1300 Multi-Position Air Handler
- Coil rated for 42,000 BTU/h, raising this 3 ton match to 15.2 SEER2
- ¾ HP direct drive, multi-speed ECM blower
- Internal factory-installed TXV
- All-aluminum evaporator coil optimized for R-32
- 21" C cabinet, 53-7/16" tall with 21-1/8" depth
- Upflow or horizontal, with a DFKE-02 downflow kit available
- Foil-faced insulation and screw-less sides reduce cabinet sweating
- DecaBDE-free drain pan with secondary drain connections
- Tool-less 19.5" x 20" filter access
- Accepts HKTS electric heat kits from 3 kW up to 19 kW
Specifications & Manuals
Documentation includes GLXS4BA3610 expanded cooling and electrical data, AMST42CU1300 airflow tables, heat kit ratings, cabinet dimensions and installation procedures.
Frequently Asked Questions
How is this 3 ton different from the GLXS4BA3610 with AMST36CU1300?
Both use the same GLXS4BA3610 condenser. This package pairs it with the AMST42CU1300 for a 15.2 SEER2 rating, compared with 14.5 SEER2 for the AMST36CU1300 match. The air handler is 4-7/16" taller.
Why does a larger air handler raise the SEER2 of a 3 ton condenser?
The AMST42CU1300 has a bigger evaporator coil rated for 42,000 BTU/h. That extra coil surface improves heat transfer at 3 ton capacity, which is reflected in the AHRI-certified 15.2 SEER2 rating (#214859637).
Does the AMST42CU1300 need more headroom than the AMST36CU1300?
Yes. It's 53-7/16" tall versus 49", with the same 19-13/16" width and 21-1/8" depth. Confirm vertical clearance in closets or length in horizontal attic installs.
Can I reuse my existing 3 ton line set?
Goodman specifies a 3/8" liquid and a 7/8" suction line for a 25 ft. run. Your installer should verify the existing line set's size, length and condition, and follow the GLXS4 GLXS5 Installation Manual before reusing it.
Is this a good upgrade from an older R-410A 3 ton system?
Yes. It replaces both the outdoor and indoor units with a matched, AHRI-certified R-32 system. You get a scroll compressor, an internal TXV and a multi-speed ECM blower in one package.
What's the difference between this A/C and the 3 ton heat pump version?
This system cools and relies on an optional electric heat kit for heat. The 3 ton Goodman R32 heat pump system GLZS4BA3610 provides both heating and cooling from the outdoor unit.
GLXS4B Technical Specifications"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).
