Model: GPHM34231 | Type: R-32 packaged heat pump | Nominal size: 3.5 ton
Goodman GPHM3 is an R-32 packaged heat pump (all-in-one outdoor unit) built for ducted cooling and heating with horizontal or downflow airflow configurations. It’s designed for applications where the outdoor unit connects directly to supply/return ductwork. Sizing should be done with a proper load calculation (tonnage is capacity, not a guaranteed square-foot number).
Specs at a glance
- Efficiency ratings: 13.4 SEER2, 10.6 EER2, 6.70 HSPF2
- Cooling capacity: 38,500 BTU/h total / 29,250 BTU/h sensible
- Heating capacity: 37,000 BTU/h @ 47°F (COP 3.58); 22,200 BTU/h @ 17°F (COP 2.36)
- Compressor: Scroll (Single-stage); RLA 16.58, LRA 121.5
- Indoor airflow: 1,250 nominal CFM with multi-speed ECM blower (5 speeds); blower FLA 5.4; motor 3/4 HP
- Refrigerant: R-32; factory charge 110 oz (A2L / mildly flammable—install and service per applicable codes by qualified technicians)
- Electrical: 1-phase 208-230V, 60 Hz; minimum circuit ampacity (MCA) 27.52; max overcurrent protection (MOP) 40
- Sound rating: 80 dB
- Weight: 450 lb operating / 480 lb shipping
- Certifications: AHRI Certified; UL Listed
Cooling details
Provides 38,500 BTU/h of total cooling with 29,250 BTU/h of sensible capacity. EER2 (10.6) is measured at a single test condition, while SEER2 (13.4) represents seasonal efficiency over a range of conditions—use both to compare models and estimate operating costs.
Heating details
Heat pump output is listed at two common rating points: 37,000 BTU/h at 47°F and 22,200 BTU/h at 17°F. The COP values (47°F: 3.58, 17°F: 2.36) indicate heating efficiency at those points. In colder climates, many installations add a field-installed electric heat kit for auxiliary/emergency heat.
Airflow, comfort & filtration
- Multi-speed ECM indoor blower helps match airflow to duct design and comfort needs.
- Convertible airflow supports horizontal or downflow duct connections (field-configurable).
- Metering device: evaporator Piston; condenser Piston.
- Filtration approach depends on your installation (internal/external filter racks are available as accessories).
Construction & durability
- Condenser coil: copper tube/aluminum fin. Evaporator coil: all-aluminum.
- Compressor: single-stage scroll.
- Heavy-gauge galvanized-steel cabinet with Architectural Gray powder-paint finish and foil-faced internal insulation (reinforced with fiberglass scrim).
- Fully insulated air-handling compartment with access panels and louvered condenser coil protection.
- Meets cabinet air leakage requirements when tested to ASHRAE Standard 193; when properly anchored, meets 2023 Florida Building Code unit integrity requirements for hurricane-type winds (anchor bracket kits available).
Installation planning (verify before ordering)
- Chassis size: Large
- Unit dimensions: W 47 in × D 51 in × Height A 40 in (Height B 42¾ in)
- Duct openings: Supply 16 x 18 (W×H) / Return 16 x 18 (W×H)
- Condensate drain: 3/4" NPT female connection.
- Downflow installs: manufacturer notes require horizontal duct covers plus either a downflow conversion kit or a downflow economizer.
- Electrical planning: use MCA/MOP values for breaker and wire sizing, and always verify against the unit’s nameplate (S&R plate). Use time-delay fuses or HACR-type breakers as required.
Common add-ons (sold separately)
- Electric heat kit (field-installed) for auxiliary/emergency heat
- Economizer options (fresh air / ventilation) — varies by chassis
- Roof curb and concentric kit options — varies by chassis
- Filter rack options (internal downflow or external horizontal)
What’s included: packaged heat pump unit only (factory charged). Thermostat/controls, ductwork, curb, economizer, and electric heat kit (if needed) are typically purchased separately and installed by a licensed HVAC professional.
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