3.5 Ton Rheem Select 14.3 SEER2 R454B Single Stage Central System WA14AY42AJ1NA, RH1AY4821STANNJ
This Rheem Endeavor® Line Select™ system pairs the WA14AY42AJ1NA condenser with the RH1AY4821STANNJ single-stage-airflow air handler, AHRI certified at 14.3 SEER2 (#217232237). It delivers 42,000 BTU/h on low-GWP R-454B refrigerant. The 21" RH1AY4821 uses an N-style coil and includes Rheem's PlusOne® Refrigerant Detection System™. It's cooling only, with Rheem electric heat strips up to 20 kW offered.
Is a 3.5 Ton Air Conditioning System the Right Size?
A 3.5 ton system provides 42,000 BTU/h of nominal cooling. It's common in larger 3- and 4-bedroom homes around 1,800–2,100 sq. ft. as a rough guide. Climate and sun exposure can move that range a lot.
A 3.5 ton system needs more return air than a 3 ton, and undersized ductwork causes noise and lost efficiency. A Manual J load calculation and a duct review confirm the fit.
Ideal for: Larger 3- and 4-bedroom homes and open layouts on a budget.
Need more capacity? Step up to the 4 Ton Rheem Select 13.8 SEER2 R454B Single Stage Central System WA14AY48AJ1NA, RH1AY4821STANNJ, which uses the same air handler.
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 | WA14AY42AJ1NA — 3.5 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 — 20 MCA / 30A Max Overcurrent |
| Air Handler Electrical | 208/240V, Single Phase — 7 MCA / 15A Max Overcurrent (No Heat Kit) |
The WA14AY42AJ1NA condenser is 35.17" tall on a 33.66" x 33.66" base and weighs 252 lbs (operating), with a 73 dBA sound rating. The RH1AY4821STANNJ air handler is 21" wide and 50.5" tall and weighs 128 lbs, with a 3/4 HP motor. Complete the install with compatible thermostats and copper line sets and fittings.
Condensing Unit & Air Handler Features
WA14AY42AJ1NA Outdoor Condensing Unit
- 42,000 BTU/h nominal cooling capacity
- Single-stage scroll compressor
- 73 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 (3,431 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 compare to the 3.5 ton Select system with the RH2TY?
The WA14AY42AJ1NA, RH2TY4821STANNJ system uses the same condenser with a two-stage-airflow air handler and is rated 15.2 SEER2. This RH1AY version is rated 14.3 SEER2.
How does the Select WA14AY42 system differ from the Classic RA14AY42 version?
The RA14AY42AJ1NA, RH1AY4821STANNJ system uses the same air handler and 14.3 SEER2 rating, with a Classic cabinet that adds Triple Service Access and a composite base pan.
Do LG-compressor WA14AY42 units include a crankcase heater?
Yes. Rheem states that 208/230V WA14AY42 models with an LG compressor come with a 44-101884-08 crankcase heater factory installed.
How much R-454B is factory charged in the WA14AY42AJ1NA?
Rheem lists a 142 oz. factory charge, sized for 15 ft. of line set. Longer runs need added refrigerant per the installation instructions.
What circuit does the RH1AY4821STANNJ need without heat?
Rheem lists 5.2 motor amps, a 7.0 amp minimum circuit ampacity and 15 amp maximum overcurrent protection at 208/240V without electric heat.
What size breaker does the WA14AY42AJ1NA call for?
Rheem lists a 20 amp minimum circuit ampacity and 30 amp maximum overcurrent protection, with a 14.7 RLA compressor.
WA14AY Technical SpecificationsWA14AY Installation InstructionsRH1AY Technical SpecificationsRH1AY Installation InstructionsRheem Warranty Certificate
