3.5 Ton Rheem 15.2 SEER2 R454B Two Stage Heat Pump System RP15AY42AJ2NA, RH2TY4821STANNJ
Matching the RP15AY42AJ2NA two-stage heat pump with the 21" RH2TY4821STANNJ air handler, this Rheem system delivers 3.5 tons of R-454B heating and cooling at 15.2 SEER2 under AHRI #215487001. It is the first size in the series to use the wider 21" cabinet and 3/4 HP blower, giving it the airflow needed for larger open floor plans, homes with lots of glass, and households that land between 3 and 4 tons.
Is a 3.5 Ton Heat Pump System the Right Size?
Rheem rates this combination at 40,000 BTU/h of both cooling and heating at 47°F. It is meant for larger single-family homes and higher-load situations, such as hot climates where a 3 ton system runs nearly nonstop in summer.
At this size, return air and supply duct design have a big effect on comfort and noise. Make sure the ducts can carry the higher airflow before replacing a smaller system. Climate, insulation, and occupancy still drive the load, so a Manual J calculation and a duct check are both worthwhile.
Ideal for: Larger single-family homes, open-concept layouts, homes with large window areas, and replacement of an existing 3.5 ton system.
Need more capacity? Step up to the 4 Ton Rheem 15.2 SEER2 R454B Two Stage Heat Pump System RP15AY48AJ2NA, RH2TY4821STANNJ, which uses the same air handler and outdoor cabinet.
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 | RP15AY42AJ2NA — 3.5 Ton R-454B Two-Stage Heat Pump |
|---|---|
| Indoor Air Handler | RH2TY4821STANNJ — 3.5-4 Ton Two-Stage Multipoise Air Handler with TXV |
| System Rating | 15.2 SEER2, 11.7 EER2, 7.8 HSPF2, 40,000 BTU/h Cooling, AHRI #215487001 |
| Refrigerant | R-454B (A2L, Low GWP) |
| Compressor | Two-Stage Scroll Compressor |
| Defrost | Demand Defrost Control |
| Electrical | 208/230V, Single Phase, 60 Hz Heat Pump — MCA 24 A, Max Breaker 40 A |
| Air Handler Electrical | 208-240V, Single Phase — 3/4 HP Constant Torque Motor, 21" Cabinet |
The RP15AY42AJ2NA steps up to a 7/8" suction valve and a 130 oz R-454B charge. Rheem's line size table allows either a 3/4" or 7/8" suction line at this size depending on run length; this listing offers 3/4" x 3/8" copper line sets. The RH2TY4821STANNJ air handler uses 7/8" vapor connections and accepts up to a 15 kW breakered Rheem heat strip on this listing.
Heat Pump & Air Handler Features
RP15AY42AJ2NA Outdoor Heat Pump
- Two-stage scroll compressor (18 RLA)
- 7/8" suction and 3/8" liquid service valves
- 130 oz R-454B factory charge for 15 feet of line
- 24" three-blade fan with 1/5 HP motor
- Demand defrost control
- Inverted reversing valve with gravity-assist shifting
- PlusOne® Refrigerant Detection System
- Low ambient capability with RXAD-A08 kit
- 39" H x 35-3/4" W x 35-3/4" L cabinet, 240 lbs
- 74 dBA weighted sound power rating
RH2TY4821STANNJ Multi-Position Air Handler
- 21" wide cabinet, 50-1/2" tall
- 3/4 HP two-stage constant torque motor
- Rated for 3.5 and 4 ton outdoor units
- 7/8" vapor and 3/8" liquid sweat connections
- Factory TXV and A2L refrigerant sensor
- Upflow, downflow, horizontal left, or horizontal right
- Aluminum coil with internally grooved tubing
- Less than 2% cabinet air leakage at 1" H2O
- Slide-out blower for service access
- Heat strip options up to 15 kW breakered on this listing
Specifications & Manuals
See the RP15AY specifications for the 3.5 ton line size table and accessory list, and the RH2TY installation instructions for 21" cabinet airflow and heater kit setup.
Frequently Asked Questions
Who should consider the 3.5 ton RP15AY42AJ2NA two-stage system?
Owners of larger homes with a load near 42,000 BTU/h, open layouts, or lots of glass, and homes in hot climates that land between 3 and 4 tons on a load calculation.
Why does a 3.5 ton system include the RH2TY4821STANNJ air handler?
The RH2TY4821STANNJ is Rheem's 3.5 to 4 ton air handler. Its 21" cabinet and 3/4 HP motor provide the airflow this size needs, and the pair is certified under AHRI #215487001.
What suction line size works with the RP15AY42AJ2NA?
The service valve is 7/8". Rheem's line size table allows a 3/4" or 7/8" suction line at 3.5 tons, with 7/8" holding capacity better on long runs.
How much refrigerant ships in the RP15AY42AJ2NA?
Rheem lists a 130 oz R-454B factory charge, enough for 15 feet of line. The installer adds charge for longer runs per the installation instructions.
Is there a low ambient kit for this heat pump?
Yes. Rheem lists the RXAD-A08 low ambient control as an accessory for the RP15AY42AJ2NA for applications that need cooling in cooler outdoor temperatures.
How big is the RH2TY4821STANNJ air handler?
Rheem lists it at about 21-1/2" wide and 50-1/2" tall. Measure your closet or platform before ordering, especially if replacing a 17.5" unit.
RP15AY Technical SpecificationsRP14AY, WP14AY, RP15AY Installation InstructionsRH2TY Technical SpecificationsRH2TY Installation InstructionsRheem Warranty Certificate
