4 Ton Rheem 14.3 SEER2 R-454B Two Stage Heat Pump System RP14AY48AJ2NA, RH2TY4821STANNJ
Forty-eight thousand BTU of two-stage capacity, built for larger single-system homes. The RP14AY48AJ2NA outdoor heat pump drives the RH2TY4821STANNJ air handler at the top of that cabinet's rating, delivering full four-ton output on R-454B refrigerant with a 27 amp minimum circuit ampacity. For builders and contractors working 2,000 to 2,400 square foot plans, this is the workhorse size of the Endeavor Line Classic Series.
Is a 4 Ton Heat Pump System the Right Size?
Four tons covers approximately 1,900 to 2,400 square feet in a hot climate. Larger four and five bedroom homes, houses with a lot of glass, and open-plan layouts with two-story great rooms commonly land here. It is also a common capacity for light commercial spaces such as offices, salons and small retail suites.
At this capacity, distribution becomes the deciding factor. A 4 ton system moves around 1,600 CFM, and a home that fights to deliver that airflow will feel uneven no matter how the equipment is rated. Long duct runs, a single undersized return, and closed interior doors all raise static pressure. If one part of the house is consistently warmer, zoning or a second smaller system is often a better answer than simply adding tonnage.
Ideal for: Four and five bedroom homes, open-plan houses with two-story great rooms, homes with extensive glass, and light commercial offices or retail suites in the 1,900 to 2,400 square foot range.
Need more capacity? Step up to the 5 Ton Rheem RP14AY60AJ2NA, RH2TY6024STANNJ Heat Pump System at 15.2 SEER2, or the narrower-cabinet 5 Ton RP14AY60AJ2NA, RH2TY6021STANAJ system when closet width is limited.
Recommended capacity ranges are general guidelines only. Actual system requirements depend on insulation, window area, duct design, air infiltration, and local climate. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Outdoor Heat Pump | RP14AY48AJ2NA — 4 Ton / 48,000 BTU Two-Stage Heat Pump |
|---|---|
| Indoor Air Handler | RH2TY4821STANNJ — 21.5 in. Wide Multiposition Air Handler |
| Application | Residential and Light Commercial Split System Heat Pump |
| Refrigerant | R-454B Low GWP (A2L) |
| Compressor | Two-Stage Scroll |
| Rated Efficiency | 14.3 SEER2 / 9.0 EER2 / 7.5 HSPF2 (Region IV) |
| AHRI Reference | 214568778 |
| Condenser Electrical | 208/230V, Single Phase, 60 Hz — 27 MCA / 45 A Max Fuse or Breaker |
| Air Handler Electrical | 208/240V, Single Phase, 60 Hz |
| Line Set Connections | 3/8 in. Liquid, 7/8 in. Vapor |
This match tops out the RH2TY4821STANNJ cabinet, so there is no headroom left indoors for a future capacity increase without changing air handlers. Plan the electrical accordingly, since the 45 amp maximum breaker is a step above the 3.5 ton system, and size auxiliary heat with a kit such as the 19.2 kW Rheem RXBH heat strip only after confirming fit and circuit capacity in the RH2TY tables.
Condenser & Air Handler Features
RP14AY48AJ2NA Outdoor Heat Pump
- 48,000 BTU two-stage scroll compressor for large-home and light commercial loads
- Two discrete capacity steps reduce on-off cycling on partial-load days
- Inverted reversing valve with gravity-assist shifting for durable defrost operation
- Expanded valve space and 15 in. corner access speed up charging and service calls
- Individual louver panels can be removed for coil cleaning without full teardown
- PlusOne Refrigerant Detection System combines the A2L sensor and mitigation board
- Automatic outdoor unit shutdown if refrigerant is detected above threshold
- Standard 24V control interface works with conventional two-stage heat pump thermostats
- R-454B refrigerant delivers a 78 percent GWP reduction over previous generation refrigerants
- 27 amp minimum circuit ampacity with 45 amp maximum overcurrent protection
RH2TY4821STANNJ Air Handler
- 21.5 in. cabinet operating at the top of its 3.5 to 4 ton rating
- 3/4 HP constant-torque ECM blower sized for approximately 1,600 CFM
- Two-stage airflow profile follows compressor staging for quieter part-load operation
- 7/8 in. vapor and 3/8 in. liquid sweat connections match the larger outdoor unit
- Field-installed heat kits to 18.0 kW at 208V or 24.0 kW at 240V
- Breakered heat kits satisfy UL and cUL service disconnect requirements
- Upflow, downflow, horizontal left and horizontal right installation from one cabinet
- Aluminum A-coil construction throughout for corrosion resistance
- Foil-faced 1.0 in. insulation with verified sub-2 percent cabinet leakage
- Onboard A2L detection shares the same architecture as the outdoor unit
Specifications & Manuals
Specification and submittal documents for both the RP14AY outdoor unit and the RH2TY air handler are provided, along with installation instructions, the product brochure, and Rheem warranty terms. On commercial and permitted jobs, the submittal sheets carry the dimensional, weight and electrical data most inspectors and general contractors ask for.
Frequently Asked Questions
How many square feet will a 4 ton Rheem heat pump condition?
Typically 1,900 to 2,400 square feet in the Southeast, and more in a milder climate or a tightly built home. Ceiling height and glass area move that number substantially, so a load calculation is the only way to be certain.
Do the 3.5 ton and 4 ton systems use the same air handler?
Yes, both use the RH2TY4821STANNJ. The 3.5 ton RP14AY42AJ2NA system sits at the bottom of that cabinet's range and this one sits at the top, so the outdoor unit and circuit sizing are the practical differences.
What is the minimum circuit ampacity for the RP14AY48AJ2NA?
27 amps, with a 45 amp maximum fuse or circuit breaker on 208/230V single phase power. That is a step up from the 3.5 ton unit, so an existing 40 amp circuit may need to be re-evaluated on a replacement job.
Can a 4 ton heat pump work in a light commercial space?
It is frequently used that way in offices, salons and small retail suites. Commercial loads often carry higher occupancy and equipment heat gain than a house of the same size, so the load calculation should reflect actual use rather than floor area alone.
Does this system include a thermostat?
No, the thermostat is ordered separately. Any 24V control with two-stage compressor and auxiliary heat terminals will run it, from a basic programmable unit to a smart Wi-Fi model. Browse the complete systems category for matched accessories.
What warranty coverage applies to the RP14AY48AJ2NA?
Rheem publishes conditional parts coverage of up to ten years when the equipment is registered within the required period after installation; unregistered equipment receives the shorter standard term. The exact terms, exclusions and registration deadline are in the Rheem warranty document linked above.
RP14AY Technical SpecificationsRP14AY BrochureRP14AY Installation InstructionsRP14AY Submittal SheetRH2TY Technical SpecificationsRH2TY Installation InstructionsRH2TY Submittal SheetRheem Warranty Certificate
