4 Ton Goodman 15.2 SEER2 R32 A/C System GLXS5BA4810, AMST48CU1300
This GLXS5B package brings premium efficiency to large-home cooling. It pairs the 48,000 BTU/h GLXS5BA4810 condenser with the AMST48CU1300 air handler at 15.2 SEER2 (AHRI #215381000). That's a meaningful step up from the 14 SEER2 GLXS4 4 ton for homeowners with big cooling loads and long summers, where every efficiency point adds up. The system has a scroll compressor with a factory crankcase heater, a 1/4 HP condenser fan, an internal TXV and a 10"-wide ECM blower wheel. It's cooling only, with optional field-installed electric heat.
Is a 4 Ton Air Conditioning System the Right Size?
Four tons (48,000 BTU/h) is typically considered for large homes, often around 2,100–2,500 sq. ft. as a loose benchmark. At this size, a small sizing error means a big difference in comfort and humidity control. A room-by-room load calculation is worth the time.
Two-story heat buildup, vaulted ceilings, pool-facing glass and ducts in a hot attic all push the load up. Upgraded insulation, low-E glass and radiant barriers bring it down. Make sure the supply and return ductwork can move 4 ton airflow, or the higher SEER2 rating won't translate into real-world savings.
Ideal for: Large single-family homes, two-story homes with 4+ bedrooms and homes with long cooling seasons where efficiency pays back.
Need more capacity? Step up to the 5 Ton Goodman 16.2 SEER2 R32 A/C System GLXS5BA6010, AMST60DU1300, the two-stage flagship of the GLXS5 series.
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 | GLXS5BA4810 — 4 Ton High-Efficiency R32 Split System Air Conditioner |
|---|---|
| Indoor Air Handler | AMST48CU1300 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 High-Efficiency Scroll Compressor with Factory Crankcase Heater |
| Metering Device | Factory-Installed Internal Thermal Expansion Valve (TXV) |
| Electrical | 208/230V, Single Phase, 60 Hz Condensing Unit — 25.5 MCA / 40A Max Overcurrent |
| Air Handler Electrical | 208/240V, Single Phase — 7.1 MCA / 15A Max Overcurrent (No Heat Kit) |
The GLXS5BA4810 condenser uses the same 35-1/2" x 35-1/2" x 36-1/2" chassis as the 3.5 ton. It weighs 249 lbs, carries a 138 oz. factory R-32 charge and has a 75 dBA sound rating. The AMST48CU1300 air handler is the tallest C-cabinet model at 58". It uses a 10" x 10" blower wheel and the DFKE-03 kit for downflow installs. Compared with the 4 ton GLXS4 system, the indoor unit is the same. The upgrade to 15.2 SEER2 comes from the GLXS5 condenser.
Condensing Unit & Air Handler Features
GLXS5BA4810 Outdoor Condensing Unit
- 48,000 BTU/h nominal cooling capacity
- High-efficiency single-stage scroll compressor
- Factory-installed crankcase heater
- 1/4 HP PSC condenser fan motor
- 75 dBA rated sound level
- 138 oz. factory R-32 charge for 15 ft. of tubing
- 3/8" liquid and 1-1/8" suction line sizes for 25 ft. runs
- Compatible with CSR-U-2 and CSR-U-3 hard-start kits
- Venturi design and steel louver coil guard
- 10-year parts limited warranty with online registration within 60 days
AMST48CU1300 Multi-Position Air Handler
- 48,000 BTU/h nominal capacity
- 10" x 10" blower wheel with ¾ HP multi-speed ECM motor
- Internal factory-installed TXV
- All-aluminum evaporator coil with 7/8" suction connection
- 21" C cabinet, 58" tall with 21-1/8" depth
- DFKE-03 downflow kit available
- Cabinet air leakage under 1.4% at 0.5" H₂O (ASHRAE 193)
- Optional HHK0005 high humidity kit
- Tool-less 19.5" x 20" filter access
- HKTS electric heat kits from 3 kW up to 19 kW
Specifications & Manuals
Documentation includes GLXS5BA4810 electrical and refrigerant data, accessory compatibility, AMST48CU1300 airflow and heat kit tables, dimensions and installation steps.
Frequently Asked Questions
How much more efficient is this than the 4 ton GLXS4 system?
This GLXS5BA4810 and AMST48CU1300 match is AHRI rated at 15.2 SEER2, compared with 14 SEER2 for the GLXS4BA4810 system with the same air handler.
Do the 3.5 and 4 ton GLXS5 condensers share a cabinet?
Yes. Both measure 35-1/2" x 35-1/2" x 36-1/2". The GLXS5BA4810 differs in capacity, electrical data (25.5 MCA / 40A) and a 138 oz. factory charge.
What electrical service does the GLXS5BA4810 require?
Goodman lists a minimum circuit ampacity of 25.5 and a maximum overcurrent protection of 40 amps, using time-delay fuses or HACR-type breakers. The air handler needs its own circuit sized for any heat kit you add.
Why does the 4 ton use a C-cabinet air handler instead of a D cabinet?
Goodman builds the AMST48CU1300 in the 21" C cabinet but makes it taller, at 58", with a wider 10" blower wheel. That keeps the width manageable while handling 4 ton airflow.
Can I get this 4 ton efficiency level in a heat pump?
Yes. The 4 ton Goodman GLZS5 R32 heat pump system with the AMST48CU1300 is also listed at 15.2 SEER2 and adds heat pump heating.
Is the GLXS5BA4810 a two-stage unit?
No. The GLXS5BA4810 uses a single-stage scroll compressor. In the GLXS5B series, only the 5 ton GLXS5BA6010 uses a two-stage scroll compressor.
GLXS5 Technical Specifications
GLXS Installation Manual
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).
