4 Ton Rheem Select 14.3 SEER2 R454B Two Stage Heat Pump System WP14AY48AJ2NA, RH2TY4821STANNJ
Built for larger homes that need serious capacity without a premium price tag, this 4 ton Rheem Select system pairs the WP14AY48AJ2NA two-stage heat pump with the RH2TY4821STANNJ air handler and supports up to a 20 kW backup heat strip. Rated 14.3 SEER2 under AHRI #214568813 on R-454B, its outdoor coil uses a denser 24 fins-per-inch design, the only Select size built that way.
Is a 4 Ton Heat Pump System the Right Size?
Rheem's tested data lists 45,500 BTU/h of cooling, 44,000 BTU/h of heating at 47°F, and 27,500 BTU/h at 17°F. That fits larger two-story homes, houses with high ceilings or extensive glass, and hot-climate homes with long cooling seasons.
At 4 tons, duct capacity often decides how well the system performs. Supply and return ducts must handle the higher airflow without noise. Insulation, climate, and how the home is used still drive the load, so confirm with a calculation before choosing between 3.5, 4, and 5 tons.
Ideal for: Larger two-story homes, homes with vaulted ceilings or lots of glass, colder-climate homes needing larger backup heat, and replacement of an existing 4 ton heat pump.
Need more capacity? Step up to the 5 Ton Rheem Select 15.2 SEER2 R454B Two Stage Heat Pump System WP14AY60AJ2NA, RH2TY6024STANNJ, the largest system in the Select series.
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 | WP14AY48AJ2NA — 4 Ton R-454B Two-Stage Heat Pump |
|---|---|
| Indoor Air Handler | RH2TY4821STANNJ — 3.5-4 Ton Two-Stage Multipoise Air Handler with TXV |
| System Rating | 14.3 SEER2, 9.0 EER2, 7.5 HSPF2, 45,500 BTU/h Cooling, AHRI #214568813 |
| Refrigerant | R-454B (A2L, Low GWP) |
| Compressor | Two-Stage Scroll Compressor |
| Warranty | 5-Year Limited Parts & 5-Year Compressor (WP14AY Outdoor Unit) |
| Electrical | 208/230V, Single Phase, 60 Hz Heat Pump — MCA 27 A, Max Breaker 45 A |
| Air Handler Electrical | 208-240V, Single Phase — 3/4 HP Constant Torque Motor, 21" Cabinet |
This package shares the RH2TY4821STANNJ air handler and 35-1/8" outdoor cabinet with the 3.5 ton system but adds a larger compressor and opens a 20 kW Rheem heat strip option. Plan for a 7/8" x 3/8" copper line set (offered on this listing), a 45 A maximum breaker, and a solid condenser pad.
Heat Pump & Air Handler Features
WP14AY48AJ2NA Outdoor Heat Pump
- Two-stage scroll compressor (20 RLA, 141 LRA)
- Outdoor coil with 24 fins per inch
- 27,500 BTU/h heating at 17°F per Rheem tested data
- 115 oz R-454B factory charge
- 7/8" suction and 3/8" liquid service valves
- Fully louvered steel cabinet
- PlusOne® Refrigerant Detection System
- 24" three-blade fan with 1/5 HP motor
- 35-1/8" H x 33-5/8" W x 33-5/8" L cabinet
- 74 dBA weighted sound power rating
RH2TY4821STANNJ Multi-Position Air Handler
- Full 4 ton rating with two-stage airflow
- 3/4 HP constant torque (ECM) motor
- Nominal airflow of 1,400 CFM low / 1,600 CFM high
- 21" wide cabinet
- Factory TXV and A2L refrigerant sensor
- 4-way convertible installation
- 1" foil-faced insulation
- Heater kits include circuit breakers for service disconnect
- Side or top electrical connection provisions
- Accepts heat strips up to 20 kW on this listing
Specifications & Manuals
Documentation includes WP14AY 4 ton capacity and electrical data, cold-weather heating performance, the charging chart, RH2TY airflow and heater kit tables, and warranty details.
Frequently Asked Questions
When does the 4 ton WP14AY48AJ2NA make sense?
When a load calculation shows roughly 48,000 BTU/h, common in larger two-story homes, homes with high ceilings, and hot climates with long cooling seasons.
How does the 4 ton Select system differ from the 3.5 ton?
Both use the RH2TY4821STANNJ and the same outdoor cabinet. The 4 ton adds about 5,500 BTU/h of cooling, supports a 20 kW heat strip, uses a 7/8" line set on this listing, and needs a 45 A maximum breaker versus 40 A.
What electrical service does the WP14AY48AJ2NA need?
Rheem lists a 27 A minimum circuit ampacity and a 45 A maximum overcurrent protection.
What is the largest heat strip offered for the 4 ton Select system?
A 20 kW heat strip (RXBH-1724A20J-1), along with 5, 8, 10, and 15 kW options.
Can the 4 ton system help control humidity?
Yes. Two-stage operation runs longer on low stage for better moisture removal, and Rheem's installation instructions include two-stage thermostat wiring with dehumidification.
What airflow does the RH2TY4821STANNJ provide at 4 tons?
Rheem lists nominal airflow of 1,400 CFM on low stage and 1,600 CFM on high stage.
WP14AY Technical SpecificationsRP14AY, WP14AY, RP15AY Installation InstructionsWP14AY Submittal SheetWP14AY Warranty CardWP14AY BrochureRH2TY Technical SpecificationsRH2TY Installation InstructionsRheem Warranty Certificate
