3.5 Ton Goodman 15.0 SEER2 R-32 Two-Stage Heat Pump Package Unit GPHM54231
The Goodman GPHM54231 delivers 41,000 BTUh of heat pump heating at 47°F, enough to warm larger homes on electricity alone through most of the season. It is a 3.5 ton, two-stage packaged heat pump that provides 42,000 BTUh of total cooling at 15.0 SEER2, with 24,000 BTUh of heating at 17°F and a 6.8 HSPF2 rating. Its 3/4 HP ECM blower moves 1,275 CFM, and the unit is factory charged with R-32. It suits larger homes and small businesses that want year-round, all-electric comfort. Browse all heat pump package units.
Is a 3.5 Ton Two-Stage Heat Pump Package Unit the Right Size?
A 3.5 ton heat pump fits cooling loads of about 40,000 to 42,000 BTUh, which is common for larger ranch homes, two-story homes on one system, and light commercial spaces. Compared with the 3 ton, it adds 6,000 BTUh of cooling, 5,600 BTUh of heating at 47°F, and 2,000 BTUh at 17°F. That is a meaningful gain for homes in colder regions.
Note that the 3.5 ton and 4 ton GPHM5 have identical heating ratings (41,000 BTUh at 47°F, 24,000 BTUh at 17°F). If heating is your main concern, the 3.5 ton offers the same warmth with a smaller cooling capacity, which is often the better choice when summer loads don't call for 4 tons.
Ideal for: Larger all-electric homes, two-story homes on a single system, and light commercial spaces with 3.5 ton cooling loads and strong heating needs.
Need more capacity? Step up to the 4 Ton Goodman Two-Stage Heat Pump Package Unit GPHM54831 for more cooling and 1,575 CFM of airflow.
Recommended applications are general guidelines only. Actual system requirements depend on insulation, ductwork, climate, window area, occupancy, and a proper load calculation. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Package Unit | GPHM54231: 3.5 Ton Two-Stage Packaged Heat Pump |
|---|---|
| Cooling Capacity | 42,000 BTUh Total / 29,820 BTUh Sensible, 1,275 CFM |
| Heat Pump Heating | 41,000 BTUh @ 47°F (3.50 COP) / 24,000 BTUh @ 17°F (2.20 COP) |
| Efficiency | 15.0 SEER2 / 11.4 EER2 / 6.8 HSPF2 |
| Refrigerant | R-32, Factory Charged (136 oz.), TXV Indoor & Outdoor |
| Compressor | Two-Stage Scroll Compressor |
| Backup Electric Heat | Optional 5, 8, 10, or 15 kW Goodman Heat Kit (Sold Separately) |
| Electrical | 208/230V, Single Phase, 60 Hz; 31.7 MCA, 50 Amp Max Overcurrent (Without Heat Kit) |
The GPHM54231 uses the large chassis (47 x 51 inches, about 492 lb) with 16 x 18 inch duct openings. Fresh air options include the PGMDD103 manual and PGMDMD103 motorized downflow dampers, plus PGMDH103 and PGMDMH103 for horizontal installs. Backup heat choices include the 10 kW HKTPD101 and 15 kW HKTPD151 kits. Use the SQRPGH103 square to round adapter for round horizontal ductwork.
Cooling & Heat Pump Heating Features
GPHM54231 Cooling Mode
- 42,000 BTUh total cooling at 15.0 SEER2
- Two-stage scroll compressor (23.23 RLA / 128.4 LRA)
- 3/4 HP, 5-speed ECM blower, 1,275 CFM
- 4-row, 6.20 sq ft evaporator coil
- 2-row, 19.05 sq ft condenser coil
- 136 oz. factory R-32 charge
- TXV metering on both coils
- Liquid-line filter drier
- 78 dB sound rating
- AHRI Certified, UL Listed
GPHM54231 Heat Pump Heating Mode
- 41,000 BTUh at 47°F (3.50 COP)
- 24,000 BTUh at 17°F (2.20 COP)
- Same heating output as the 4 ton GPHM5
- 6.8 HSPF2 seasonal efficiency
- Two-stage heating operation
- Heat kits from 5 to 15 kW
- Manual and motorized fresh-air damper options
- OT18-60A outdoor thermostat kit with lockout stat
- Galvanized steel cabinet with two-tone powder paint
- 10-year parts limited warranty with registration
Specifications & Manuals
Product documentation includes GPHM5 technical specifications with expanded cooling, heating, airflow, heat kit, and accessory data, installation instructions, a service manual, and Goodman warranty terms to assist with equipment selection, installation, and service.
Frequently Asked Questions
What does the 3.5 ton GPHM54231 add over the 3 ton?
Cooling rises from 36,000 to 42,000 BTUh, heating at 47°F from 35,400 to 41,000 BTUh, and heating at 17°F from 22,000 to 24,000 BTUh. Airflow increases to 1,275 CFM. Electrical moves to 31.7 MCA with a 50 amp breaker.
Why is the 3.5 ton rated 15.0 SEER2 instead of 15.2?
Goodman's specifications list the 3.5 ton at 15.0 SEER2. The 2.5, 3, and 4 ton models are rated 15.2, the 2 ton 14.4, and the 5 ton 15.4.
Should I choose the 3.5 ton or the 4 ton GPHM5 for heating?
Both have the same heating ratings: 41,000 BTUh at 47°F and 24,000 BTUh at 17°F. Choose between them based on your cooling load. The 3.5 ton is the better fit when summer cooling needs are closer to 42,000 BTUh.
Which fresh air dampers fit the GPHM54231?
Goodman lists the PGMDD103 manual and PGMDMD103 motorized downflow dampers, and the PGMDH103 manual and PGMDMH103 motorized horizontal dampers for large-chassis units.
How loud is the 3.5 ton GPHM5?
Goodman rates the GPHM54231 at 78 decibels.
What circuit does the GPHM54231 need with a 15 kW heat kit?
With the HKTPD151 15 kW kit on a single-point connection, Goodman lists 110.04 MCA and a 125 amp maximum overcurrent device.
GPHM5 Technical SpecificationsGPHM5 Installation InstructionsGPHM5 Service ManualGoodman Warranty Certificate
