4 Ton Goodman 15.2 SEER2 R32 Heat Pump System GLZS5BA4810, AMST48CU1300
The Goodman 4 ton heat pump system pairs the GLZS5BA4810 R-32 outdoor unit with the AMST48CU1300 ECM air handler in a 15.2 SEER2, AHRI-certified match (AHRI #218222712). It's rated for about 45,500 BTU/h of cooling at 95°F and 46,000 BTU/h of heating at 47°F, with 1,490 CFM of airflow. This size switches to Goodman's 7 mm copper-tube outdoor coil and a 10" x 10" indoor blower wheel. It's designed for owners of large family homes and the contractors who install high-capacity, all-electric comfort.
Is a 4 Ton Heat Pump System the Right Size?
Four tons suits larger homes with substantial heating and cooling loads across multiple floors or wide-open living spaces. Because heating capacity at 47°F is slightly higher than cooling capacity, this system works well in mixed climates.
Confirm the load with a calculation, and make sure the duct system and returns are sized for about 1,490 CFM. Undersized ducts are a common reason larger systems underperform, and they increase blower noise and energy use.
Ideal for: Large single-family homes, four- to five-bedroom houses, multi-level homes, and properties with high combined heating and cooling loads.
Need more capacity? Step up to the 5 Ton Goodman 16 SEER2 R32 Heat Pump System GLZS5BA6010, AMST60DU1300, the largest system in the line.
Recommended sizing is a general guideline only. Actual system requirements depend on insulation, climate, ductwork, windows, occupancy, and home layout. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Outdoor Heat Pump | GLZS5BA4810 — 4 Ton R-32 Heat Pump |
|---|---|
| Indoor Air Handler | AMST48CU1300 Multi-Position ECM Air Handler (C Cabinet) |
| Application | Residential Split System Heat Pump (Heating & Cooling) |
| Refrigerant | R-32 |
| Compressor | Single-Stage Scroll Compressor |
| Efficiency | 15.2 SEER2 — AHRI #218222712 |
| Electrical | 208/230V, Single Phase, 60 Hz Outdoor Unit |
| Air Handler Electrical | 208/240V, Single Phase, 60 Hz |
The AMST48CU1300 stands 58" tall in the 21" C cabinet, with a 7/8" suction coil connection and a 10" x 10" blower for higher airflow. Outside, the GLZS5BA4810 uses 7 mm copper tubes, a 1/4 HP fan, and 174 oz of factory charge. You can add heat strips up to 19 kW, 1-1/8" x 3/8" line sets, filters, and thermostats. Compare more complete heat pump split systems or use our BTU calculator.
Heat Pump & Air Handler Features
GLZS5BA4810 Outdoor Heat Pump
- About 45,500 BTU/h cooling at 95°F (rated match)
- About 46,000 BTU/h heating at 47°F; 28,000 at 17°F
- Scroll compressor (19.4 RLA / 127.7 LRA)
- Enhanced aluminum fin coil with 7 mm copper tubes
- 1/4 HP PSC condenser fan
- 35-1/2" W x 35-1/2" D x 36-1/2" H cabinet
- 25.5 A MCA, 40 A max overcurrent protection
- 1-1/8" suction and 3/8" liquid lines
- 174 oz factory R-32 charge
- 73.6 dB rated sound level
AMST48CU1300 Air Handler
- 1,490 CFM rated airflow
- 3/4 HP multi-speed ECM blower, 10" x 10" wheel
- 58" tall, 21" wide C cabinet
- 7/8" suction and 3/8" liquid coil connections
- Factory-installed TXV
- All-aluminum evaporator coil
- Factory R-32 refrigerant sensor
- Less than 1.4% cabinet leakage at 0.5 in. H2O
- Tool-less filter access, 19.5" x 20" filter
- Heat strips available up to 19 kW breakered
Specifications & Manuals
Product documentation includes outdoor heat pump and air handler technical specifications, installation instructions, and Goodman warranty information to assist with equipment selection, installation, and service.
Frequently Asked Questions
What size home is the 4 ton GLZS5BA4810 system suited for?
Larger homes, often four or more bedrooms or multi-level layouts, whose load calculation supports about 4 tons of heating and cooling.
What's the upgrade from the 3.5 ton to the 4 ton Goodman system?
The 4 ton moves to the dedicated AMST48CU1300 air handler (58" tall, 10" x 10" blower, 1,490 CFM), and the outdoor coil switches to 7 mm copper tubes. Rated cooling rises to about 45,500 BTU/h at 95°F.
How tall is the AMST48CU1300 air handler?
Goodman lists the AMST48CU1300 at 58" tall in the 21" wide C cabinet. Allow extra height for the plenum and the clearances in the installation manual.
Does the 4 ton heat pump heat better than it cools?
At 47°F, Goodman's data shows about 46,000 BTU/h of heating versus about 45,500 BTU/h of cooling at 95°F, so output is nearly even year-round. Heating drops to about 28,000 BTU/h at 17°F.
Can the GLZS5BA4810 be anchored for hurricane zones?
When properly anchored, Goodman states the unit meets 2023 Florida Building Code unit-integrity requirements for hurricane-type winds. The ABK-20 anchor bracket kit is available.
Is a hard-start kit available for the 4 ton outdoor unit?
Yes. Goodman lists the CSR-U-1 hard-start kit as a compatible accessory for all GLZS5BA sizes, including the GLZS5BA4810.
GLZS5B Technical Specifications
Goodman 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).
