4 Ton Rheem Select 14.8 SEER2 R454B Central System WA14AY48AJ1NA, RH2TY4821STANNJ
This Rheem Endeavor® Line Select™ package delivers 48,000 BTU/h for large homes. It pairs the WA14AY48AJ1NA condenser with the two-stage-airflow RH2TY4821STANNJ air handler under AHRI certificate #215358923. This match is listed at 14.8 SEER2, higher than the 13.8 SEER2 listed for the same condenser with the single-stage RH1AY air handler. It's built for large single-family and two-story homes, and for contractors who want a proven Rheem R-454B package with PlusOne® leak detection. Heat strip options go up to 20 kW.
Is a 4 Ton Air Conditioning System the Right Size?
Four tons (48,000 BTU/h) is typically considered for large homes, often around 2,100–2,500 sq. ft. as a loose benchmark. Because larger homes vary widely in load, a room-by-room calculation is especially important at this size.
Two-story heat buildup, vaulted ceilings, pool-facing glass and attic ductwork all raise the load. Return and supply ducts must also be sized to move 1,600 CFM without excess noise or static pressure.
Ideal for: Large single-family homes, two-story homes with 4+ bedrooms and homes with high ceilings or heavy sun.
Need more capacity? Step up to the 5 Ton Rheem Select 13.8 SEER2 R454B Central System WA14AY60AJ1NA, RH2TY6024STANNJ, the largest size in the line.
Recommended home sizes are general guidelines only. Actual system requirements depend on insulation, climate, windows, ductwork, occupancy and a proper load calculation. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Outdoor Condensing Unit | WA14AY48AJ1NA — 4 Ton Rheem Select R454B Air Conditioner |
|---|---|
| Indoor Air Handler | RH2TY4821STANNJ Two-Stage Airflow Multipoise Air Handler (21" Wide) |
| Application | Cooling-Only Central Air Split System (Electric Heat Kit Optional) |
| Refrigerant | R-454B (Low-GWP A2L Refrigerant) |
| Compressor | Single-Stage Scroll Compressor |
| Metering Device | Factory-Installed Expansion Valve on Indoor Coil (TXV) |
| Electrical | 208/230V, Single Phase, 60 Hz Condensing Unit — 30 MCA / 50A Max Overcurrent |
| Air Handler Electrical | 208/240V, Single Phase — 5 MCA / 15A Max Overcurrent (No Heat Kit) |
The WA14AY48AJ1NA condenser shares the 35.17" x 33.66" x 33.66" cabinet of the 3.5 ton at 243 lbs, with a 142 oz. factory charge and a 74 dBA rating. The RH2TY4821STANNJ air handler provides 1,600 CFM nominal on high stage in its 21" x 50.5" cabinet. If you'd rather have heat pump heating, see the 4 ton Rheem Select WP14AY48AJ2NA two-stage heat pump system. It uses the same air handler.
Condensing Unit & Air Handler Features
WA14AY48AJ1NA Outdoor Condensing Unit
- 48,000 BTU/h nominal cooling capacity
- Single-stage scroll compressor
- 35.17" x 33.66" x 33.66" cabinet, 243 lbs
- 142 oz. factory R-454B charge for 15 ft. of tubing
- 74 dBA weighted sound power rating
- 3/8" liquid and 7/8" suction connections
- 22.4 RLA compressor, 30 MCA / 50A max breaker
- Optimized venturi airflow with a 1/5 HP fan motor
- Low ambient, crankcase heater and liquid line solenoid accessories
- 10-year conditional parts limited warranty with registration
RH2TY4821STANNJ Two-Stage Air Handler
- Two-stage airflow up to 1,600 CFM nominal
- 3/4 HP constant torque ECM motor
- PlusOne® Refrigerant Detection System™
- 21" wide x 50.5" tall cabinet
- Upflow, downflow and horizontal configurations
- 1.0" foil-faced insulation
- Slide-out blower assembly
- Front refrigerant and drain connections
- Rheem airflow limits allow up to 25 kW of heat
- Heater kits up to 20 kW offered for this system
Specifications & Manuals
Documentation covers WA14AY48 electrical, refrigerant and dimensional data, clearances and line sizing, RH2TY4821 airflow and heater tables, installation instructions and the Rheem warranty.
Frequently Asked Questions
Why is the 4 ton rated 14.8 SEER2 instead of 15.2?
Each condenser and air handler combination is rated separately. The WA14AY48AJ1NA with the RH2TY4821STANNJ is AHRI certified under #215358923 and listed at 14.8 SEER2.
What electrical service does the WA14AY48AJ1NA need?
Rheem lists a 30 minimum circuit ampacity and a 50A maximum overcurrent protection device (HACR breaker or fuse). The air handler needs its own circuit sized for any heat kit you add.
Does the 4 ton share its air handler with the 3.5 ton?
Yes. Both use the RH2TY4821STANNJ. On 4 ton applications, it's set for Rheem's nominal 1,600 CFM high-stage airflow.
How much electric heat can the RH2TY4821STANNJ handle?
We offer heat kits up to 20 kW for this system. Rheem's airflow limits for a 4 ton RH2TY in the 21" cabinet allow up to 25 kW.
Is there a heat pump version of this 4 ton Rheem system?
Yes. The 4 ton Rheem Select WP14AY48AJ2NA two-stage heat pump system pairs a heat pump with the same RH2TY4821STANNJ air handler.
How does this compare to the WA14AY48 system with the RH1AY air handler?
The 4 ton WA14AY48AJ1NA with RH1AY4821STANNJ is listed at 13.8 SEER2. This RH2TY two-stage-airflow match is listed higher at 14.8 SEER2.
WA14AY Technical Specifications
