4 Ton Rheem Select 13.8 SEER2 R454B Single Stage Central System WA14AY48AJ1NA, RH1AY4821STANNJ
This 4 ton Rheem Endeavor® Line Select™ system matches the WA14AY48AJ1NA condenser with the RH1AY4821STANNJ single-stage-airflow air handler, AHRI certified at 13.8 SEER2 (#217232244). It delivers 48,000 BTU/h on low-GWP R-454B refrigerant at a Select-series price point, with Rheem's PlusOne® Refrigerant Detection System™ in the air handler. It's cooling only, with Rheem electric heat strips up to 20 kW offered.
Is a 4 Ton Air Conditioning System the Right Size?
A 4 ton system delivers 48,000 BTU/h of nominal cooling. It's often used in 4-bedroom homes around 2,100–2,500 sq. ft. as a general reference. Very hot climates or large glass areas can reach 4 tons at smaller square footage.
At 4 tons, duct design is critical, since undersized ductwork causes noise and uneven comfort. A Manual J load calculation paired with a Manual D duct review confirms the fit.
Ideal for: 4-bedroom homes and large open layouts where budget matters.
Need more capacity? Step up to the 5 Ton Rheem Select 13.8 SEER2 R454B Single Stage Central System WA14AY60AJ1NA, RH1AY6024STANNJ for the largest loads.
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 | RH1AY4821STANNJ Single-Stage Airflow Multipoise Air Handler (21" Wide, N-Coil) |
| 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 — 7 MCA / 15A Max Overcurrent (No Heat Kit) |
The WA14AY48AJ1NA condenser is 35.17" tall on a 33.66" x 33.66" base and weighs 243 lbs (operating). The RH1AY4821STANNJ air handler is 21" wide and 50.5" tall, with a 3/4 HP motor. Complete the install with compatible thermostats and copper line sets and fittings.
Condensing Unit & Air Handler Features
WA14AY48AJ1NA Outdoor Condensing Unit
- 48,000 BTU/h nominal cooling capacity
- Single-stage scroll compressor
- 74 dBA weighted sound power rating
- Optimized 7 mm coil design for airflow and heat transfer
- 142 oz. factory R-454B charge for 15 ft. of line set
- 24" three-blade fan with 1/5 HP motor (3,606 CFM)
- 3/8" liquid and 7/8" suction front-seating service valves
- Fully louvered steel cabinet protects internal components
- Internal pressure relief valve and internal thermal overload
- 10-year conditional parts limited warranty (registration required)
RH1AY4821STANNJ Single-Stage Air Handler
- Single-stage airflow with a constant torque (ECM) motor
- 3/4 HP constant torque motor, 1,400/1,600 CFM nominal airflow
- PlusOne® Refrigerant Detection System™ with factory-installed A2L sensor
- Aluminum fins bonded to internally grooved aluminum tubing
- 4-way convertible: upflow, downflow, horizontal left or right
- 1.0" foil-faced cabinet insulation for quieter operation
- Cabinet air leakage under 2% at 1" H₂O (ASHRAE 193)
- Slide-out blower and four-leg motor mount for easy service
- Front refrigerant and drain connections
- Field-installed heater kits up to 20 kW with UL/cUL-listed breakers
Specifications & Manuals
Documentation includes WA14AY electrical, sound, dimensional and line-size data, the (-)A14AY condenser installation instructions, RH1AY installation instructions, airflow and heater tables and the Rheem limited warranty.
Frequently Asked Questions
How does this RH1AY version compare to the 4 ton Select system with the RH2TY?
The WA14AY48AJ1NA, RH2TY4821STANNJ system uses the same condenser with a two-stage-airflow air handler and is rated 14.8 SEER2. This RH1AY version is rated 13.8 SEER2 at a lower cost.
Should I choose the Select WA14AY48 or Classic RA14AY48 with the RH1AY?
Both are rated 13.8 SEER2 with the same RH1AY4821STANNJ. The Classic RA14AY48AJ1NA system adds Triple Service Access and a composite base pan; the Select keeps the price lower.
How much does the WA14AY48AJ1NA weigh?
Rheem lists a 243 lb operating weight and a 250 lb shipping weight. It stands 35.17" tall.
Which crankcase heater fits the WA14AY48AJ1NA?
Rheem lists the 44-103663-16 compressor crankcase heater as an accessory for the WA14AY48.
How loud is the WA14AY48AJ1NA?
Rheem rates the WA14AY48 at 74 dBA weighted sound power, tested to AHRI Standard 270.
What fan does the WA14AY48AJ1NA use?
Rheem lists a 24" three-blade fan with a 1/5 HP motor, moving 3,606 CFM across the outdoor coil.
WA14AY Technical SpecificationsWA14AY Installation InstructionsRH1AY Technical SpecificationsRH1AY Installation InstructionsRheem Warranty Certificate
