2.5 Ton Goodman 15.2 SEER2 R32 Heat Pump System GLZS4BA3010, AMST42CU1300
By pairing the 2.5 ton GLZS4BA3010 outdoor heat pump with the larger AMST42CU1300 air handler, this Goodman R-32 system earns a 15.2 SEER2 rating under AHRI #215218038, compared with 14.5 SEER2 for the standard 2.5 ton match. The bigger 21" C-cabinet coil gives the refrigerant more surface area to work with, making this the efficiency-minded 30,000 BTU/h choice for homeowners who have room for a wider indoor unit and want lower operating costs.
Is a 2.5 Ton Heat Pump System the Right Size?
Capacity is still 30,000 BTU/h nominal, so this system serves the same mid-size homes as any 2.5 ton heat pump. What changes is how efficiently it gets there. If your load calculation lands at 2.5 tons and you plan to stay in the home for years, the upsized coil match is worth a look.
Efficiency ratings are only realized when the system is sized and installed correctly. Proper refrigerant charge, correct blower speed, and sealed ductwork all affect real-world performance. Local climate, insulation, and how many hours the system runs each year determine how much the higher rating saves you. Learn more on our SEER2 information page.
Ideal for: Mid-size homes in hot or long-season climates, owners planning to stay long-term, and installs with room for a 21" wide air handler.
Need more capacity? Step up to the 3 Ton Goodman 15 SEER2 R32 Heat Pump System GLZS4BA3610, AMST36CU1300 when your load calls for 36,000 BTU/h.
Recommended system sizes are general guidelines only. Actual heating and cooling requirements depend on insulation, climate, windows, ductwork, ceiling height, and occupancy. A Manual J load calculation is the best way to confirm sizing. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Outdoor Heat Pump | GLZS4BA3010 — 2.5 Ton R-32 Single-Stage Heat Pump Condenser |
|---|---|
| Indoor Air Handler | AMST42CU1300 — 3.5 Ton Multi-Position ECM Air Handler with Internal TXV |
| System Rating | 15.2 SEER2, 30,000 BTU/h Nominal, AHRI #215218038 |
| Refrigerant | R-32 |
| Compressor | Single-Stage Rotary Compressor |
| Defrost | SmartShift® Defrost Technology |
| Electrical | 208/230V, Single Phase, 60 Hz Heat Pump — MCA 15.0 A, Max Breaker 25 A |
| Air Handler Electrical | 208/240V, Single Phase — 3/4 HP ECM Blower, 21" C Cabinet |
This is an AHRI-certified upsized-coil match, not a mismatch: Goodman and AHRI rate the GLZS4BA3010 and AMST42CU1300 together at 15.2 SEER2. The wider cabinet also opens up larger heat strip options, up to a 19 kW breakered kit on this listing. Because the outdoor unit is the same as the standard 2.5 ton package, line sizes stay at 3/4" x 3/8" copper. Browse our full lineup of heat pump systems with backup heat strips to compare options.
Heat Pump & Air Handler Features
GLZS4BA3010 Outdoor Heat Pump
- 30,000 BTU/h nominal heating and cooling
- Reaches 15.2 SEER2 when matched with the AMST42CU1300
- Single-stage rotary compressor
- SmartShift® defrost for quiet heating-season operation
- Factory-installed suction-line accumulator and crankcase heater
- High- and low-pressure safety switches
- Service valves with sweat connections and easy gauge-port access
- Removable grille-style top compliant with UL 60335-2-40
- Architectural Gray finish with 500-hour salt-spray approval
- Hurricane anchor bracket kits available for Florida code compliance
AMST42CU1300 Multi-Position Air Handler
- 3.5 ton-rated coil for added surface area on a 2.5 ton system
- 21" C-width cabinet with 10" x 8" blower
- 3/4 HP direct-drive multi-speed ECM motor
- Factory-installed TXV and R-32 refrigerant sensor
- Rigid SmartFrame™ cabinet
- Horizontal or vertical installation
- Screw-less sides and back to reduce condensation in humid spaces
- Cabinet air leakage under 2.0% at 1.0" H2O (ASHRAE 193)
- Secondary drain connections on thermoplastic drain pan
- Accepts heat strips up to 19 kW breakered on this listing
Specifications & Manuals
Refer to the AMST technical specifications for C-cabinet dimensions and airflow tap settings, and the GLZS installation manual for line set and charging requirements for the GLZS4BA3010.
Frequently Asked Questions
Why is a 3.5 ton air handler paired with a 2.5 ton heat pump?
The larger AMST42CU1300 coil gives the system more heat transfer surface, which raises efficiency. This exact combination is AHRI certified at 15.2 SEER2, versus 14.5 SEER2 when the same outdoor unit is paired with the AMST30BU1300.
Is the GLZS4BA3010 and AMST42CU1300 combination AHRI certified?
Yes. The pair is listed under AHRI certificate #215218038, so the 15.2 SEER2 rating applies to this specific match.
Will the AMST42CU1300 fit an existing 17.5 inch return opening?
Not without changes. The AMST42CU1300 is a 21" C cabinet, wider than the 17.5" B cabinet. If your space or plenum is sized for a B cabinet, the 14.5 SEER2 package with the AMST30BU1300 may be the easier fit.
What heat strip sizes can go in the AMST42CU1300?
This listing offers 5, 8, 10, 15, and 19 kW options. The 15 and 19 kW kits are breakered models.
Is the 15.2 SEER2 version worth it over the 14.5 SEER2 2.5 ton system?
It depends on your climate, electricity rates, and how long you plan to keep the system. Homes with long cooling seasons tend to benefit most from the higher rating, while the 14.5 SEER2 package costs less up front.
Does the blower need to be set for the 2.5 ton outdoor unit?
Yes. The AMST42CU1300 has selectable ECM speed taps, and your installer sets airflow to match the 2.5 ton GLZS4BA3010 following the AMST installation manual.
GLZS4B Technical SpecificationsGLZS Installation ManualGLZS Warranty CertificateAMST Technical SpecificationsAMST Installation ManualAMST Warranty Certificate
