4 Ton Rheem 15.2 SEER2 R454B Two Stage Heat Pump System RP14AY48AJ2NA, RH2TY4824STANNJ
This matched Rheem Endeavor® Line system pairs the RP14AY48AJ2NA Classic® Series two-stage heat pump with the wide-cabinet RH2TY4824STANNJ multi-position air handler. It delivers 48,000 BTU of nominal heating and cooling with an AHRI-certified 15.2 SEER2 rating (AHRI #214592599). The system runs on low-GWP R-454B refrigerant and has a factory-installed A2L refrigerant sensor, so it is ready for the post-2025 refrigerant rules. It suits homeowners, landlords and HVAC contractors replacing a worn-out 4 ton heat pump, or upgrading to two-stage comfort without paying variable-speed prices.
Is a 4 Ton Heat Pump System the Right Size?
A 4 ton system is built for homes whose heating and cooling load is close to 48,000 BTU per hour. Pick it from the home's actual load, not from square footage alone. Two houses with the same floor plan can need very different capacity, and an oversized heat pump short-cycles, leaves humidity behind and wears parts faster. The RP14AY48AJ2NA's two-stage scroll compressor softens that risk. It runs on low stage most of the time and switches to full capacity only on the hottest and coldest days.
Capacity needs depend on your climate zone, attic and wall insulation, window area and sun exposure, duct condition and leakage, ceiling height, and how many people live in the home. A tonnage and BTU sizing calculator gives you a starting point. A Manual J load calculation is the most reliable way to confirm that 4 tons is the right fit.
Ideal for: Larger single-family homes, two-story houses served by one air handler, rental property replacements, and all-electric homes in moderate climates that want one system for both heating and cooling.
Need more capacity? Step up to the 5 Ton Rheem 15.2 SEER2 R454B Two Stage Heat Pump System RP14AY60AJ2NA, RH2TY6024STANNJ for homes with a heating and cooling load above what a 4 ton system can handle.
Recommended system sizes are general guidelines only. Actual requirements depend on climate, insulation, ductwork, window exposure, occupancy, and installation conditions. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Outdoor Heat Pump | RP14AY48AJ2NA — 4 Ton Two-Stage Endeavor® Line Classic® Series Heat Pump |
|---|---|
| Indoor Air Handler | RH2TY4824STANNJ 24.5" Wide Two-Stage Multi-Position Air Handler |
| Application | Residential Split System Heat Pump, Heating & Cooling |
| Refrigerant | R-454B (Low-GWP A2L) |
| Compressor | Two-Stage Scroll Compressor |
| Efficiency | 15.2 SEER2, AHRI Certified #214592599 |
| Electrical | 208/230V, Single Phase, 60 Hz Heat Pump (27 MCA / 45 Amp Max Overcurrent) |
| Air Handler Electrical | 208-240V, Single Phase, 60 Hz |
This package matches Rheem's RP14AY48AJ2NA heat pump with the RH2TY4824STANNJ air handler, which has a 24.5-inch cabinet and an N-coil. It is a larger indoor match than the 21-inch cabinet RH2TY4821STANNJ, and that larger coil is what lifts this 4 ton pairing from 14.3 to 15.2 SEER2. The air handler has a constant-torque motor with two-stage airflow that follows the compressor's low and high stages, plus a factory-installed TXV and A2L refrigerant sensor. The outdoor unit connects with a 7/8-inch suction line and a 3/8-inch liquid line. A 25 ft. 7/8 & 3/8 copper line set covers most close-coupled installs. Backup heat is field-installed. Choose a 5–20 kW kit such as the 15 kW breakered heat strip for Rheem RH2TY air handlers to match your climate.
Heat Pump & Air Handler Features
RP14AY48AJ2NA Outdoor Heat Pump
- Two-stage scroll compressor with high and low speeds for steadier temperatures and better humidity control
- Inverted reversing valve with gravity-assist shifting for faster heat transfer and less joint stress
- PlusOne® expanded valve space gives a minimum 27 sq. in. working area for brazing and service
- PlusOne® triple service access with a 15-inch removable corner and individual louver panels
- Factory-standard high- and low-pressure controls
- Internal pressure relief valve and internal thermal overload protection
- Long line capability for flexible outdoor unit placement
- Low ambient capability with the optional RXAD-A08 kit
- Factory charge sized for 15 ft. of refrigerant line, with 7/8" suction and 3/8" liquid connections
- Louvered panels and a corrosion-resistant base pan for durable curb appeal
RH2TY4824STANNJ Multi-Position Air Handler
- Constant-torque blower motor with two-stage airflow matched to the two-stage outdoor unit
- 24.5-inch wide cabinet with a larger N-coil, the matchup behind the 15.2 SEER2 rating
- 4-way convertible for upflow, downflow, horizontal-left and horizontal-right installs
- All-aluminum coil with internally grooved tubing for better corrosion resistance
- Factory-installed TXV metering device
- PlusOne® Refrigerant Detection System™ with a factory-installed A2L sensor and mitigation board
- Works with any standard 24V thermostat, such as the Honeywell T6 Pro 3H/2C thermostat
- 1.0-inch foil-faced cabinet insulation for quieter operation
- Less than 2% cabinet air leakage at 1-inch H2O per ASHRAE Standard 193
- Accepts field-installed auxiliary heater kits with UL/cUL circuit breakers for service disconnect
Specifications & Manuals
Product documentation includes the RP14AY heat pump and RH2TY air handler technical specifications. These cover model nomenclature, electrical data, dimensions, accessories, and limited warranty terms to help with equipment selection, installation, and service.
Frequently Asked Questions
How do I know if the RP14AY48AJ2NA / RH2TY4824STANNJ system is the right size for my home?
This system is rated at 48,000 BTU (4 tons) nominal. It is a good fit when a load calculation shows your home needs roughly that much heating and cooling. Square footage alone can be misleading, so check insulation, windows, ductwork and climate with our sizing calculator, or ask our team for free sizing help.
What is the difference between this system and the RP14AY48AJ2NA with the RH2TY4821STANNJ air handler?
Both use the same 4 ton outdoor heat pump. This package uses the 24.5-inch RH2TY4824STANNJ air handler, which is rated at 15.2 SEER2. The RH2TY4821STANNJ matchup uses a 21-inch cabinet and is rated at 14.3 SEER2. Choose the 21-inch version only if your closet or platform cannot fit the wider cabinet. If your load is a little lower, the 3.5 Ton RP14AY42AJ2NA system is the next size down.
Why does this Rheem heat pump use R-454B refrigerant?
This Rheem system is designed for R-454B refrigerant, a low-GWP A2L refrigerant that meets the EPA's 2025 limit of 700 GWP for new heating and cooling systems. Rheem says it has a 78% lower GWP than previous-generation refrigerants. The air handler's factory-installed A2L sensor and mitigation board pause the outdoor unit if excess refrigerant is detected.
Does this heat pump system come with backup electric heat?
No. The heat strip is a field-installed option. The RH2TY4824STANNJ accepts Rheem auxiliary heat kits from 5 kW to 20 kW, and you can add one on this page. Homes in colder climates usually choose a larger kit for backup and emergency heat during defrost cycles and very cold weather.
Can the RH2TY4824STANNJ air handler be installed in an attic or crawlspace?
Yes. The air handler is 4-way convertible for upflow, downflow, horizontal-left and horizontal-right installs. That makes it suitable for closets, attics, crawlspaces and basements. The RP14AY48AJ2NA heat pump installs outdoors.
Who typically buys this 4 ton two-stage Rheem heat pump package?
Homeowners replacing an older R-410A heat pump, HVAC contractors who need a ready-matched AHRI system, and property managers upgrading all-electric rentals. It suits anyone who wants two-stage comfort and a 10-year conditional parts warranty (registration required) without the cost of a variable-speed system.
RP14AY Technical Specifications
