4 Ton Rheem 14.8 SEER2 R454B Central System RA14AY48AJ1NA, RH2TY4821STANNJ
Forty-eight thousand BTU of cooling, rated at 14.8 SEER2 on R-454B refrigerant, from the RA14AY48AJ1NA condenser matched to the RH2TY4821STANNJ 21-inch air handler under AHRI reference 215358913. Four tons is where residential sizing starts to overlap with light commercial work, and this package handles both: larger two-story homes, homes with significant glass and volume, and small commercial suites that need real capacity without moving to a three-phase or rooftop solution.
Is a 4 Ton Refrigeration System the Right Size?
A 4 ton system moves 48,000 BTU per hour, which typically serves homes in the 2,000 to 2,400 square foot range in a hot climate. It is common on two-story homes served by a single system, larger open-plan houses, and homes in the 2,200 square foot range with average insulation and a full slate of appliances and occupants adding internal gain.
Note that the certified efficiency drops slightly here, from 15.2 SEER2 at 3.5 tons to 14.8 SEER2 at 4 tons, even though the outdoor and indoor cabinets are from the same families. That is normal: SEER2 is measured for each specific matched pair, and larger capacities carry more airflow through the same coil geometry. Both figures comfortably exceed the federal minimum for the Southeast region.
Ideal for: Two-story homes on a single system, 2,000 to 2,400 square foot open-plan houses, large ranch homes, restaurants and retail suites, and multi-zone installations.
Need more capacity? Step up to the 5 Ton Rheem 13.8 SEER2 R454B System RA14AY60AJ1NA, RH2TY6024STANNJ, the largest capacity in this series.
Recommended sizing ranges are general guidelines only. Actual system requirements depend on insulation, duct design, window area, ceiling height, occupancy, and local design conditions. Run our AC tonnage and BTU calculator, request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Outdoor Condensing Unit | RA14AY48AJ1NA — 4 Ton Endeavor Line Classic Series Air Conditioner |
|---|---|
| Indoor Air Handler | RH2TY4821STANNJ Two-Stage Multiposition Air Handler |
| Application | Residential and Light Commercial Split System, Cool Only with Field-Installed Electric Heat |
| Refrigerant | R-454B |
| Nominal Capacity | 48,000 BTU / 4 Tons |
| Rated Efficiency | 14.8 SEER2 |
| Air Handler Cabinet Width | 21 inches |
| AHRI Reference Number | 215358913 |
| Electrical | 208-230V, Single Phase, 60 Hz |
This package shares the RH2TY4821STANNJ air handler with the 3.5 ton system, which makes it useful for contractors carrying inventory across both sizes. The indoor unit is identical; only the outdoor condenser, line set sizing, and breaker sizing differ. Heat kits, thermostats, and copper are ordered separately.
Condensing Unit & Air Handler Features
RA14AY48AJ1NA Outdoor Condensing Unit
- 4 ton nominal capacity, 48,000 BTU, rated 14.8 SEER2
- Low-GWP R-454B refrigerant under the 2025 EPA 700 GWP limit
- 7mm condenser copper coil reduces refrigerant charge requirements
- Smaller and lighter cabinet than comparable legacy-coil units
- PlusOne Triple Service Access with industry-leading corner access
- Two-fastener removable corner for faster compressor-side service
- Integrated PlusOne Refrigerant Detection System with A2L sensor
- Single-component design simplifies commissioning and wiring
- Curved louvered panels and rugged corner posts for coil protection
- Powder coat paint over a corrosion-resistant composite base pan
RH2TY4821STANNJ Air Handler
- 21-inch cabinet sized for 4 ton airflow, roughly 1,600 CFM nominal
- 3/4 HP constant torque ECM blower motor
- Two-stage airflow for improved part-load comfort
- 1.0 inch foil-faced insulation on all panels
- Aluminum fin and internally grooved aluminum tube coil
- Factory thermal expansion valve
- Upflow, downflow, horizontal left and horizontal right configurations
- Accepts larger field-installed auxiliary heater kits
- Heater kit circuit breakers meet UL and cUL disconnect requirements
- Less than 2% cabinet air leakage at 1-inch H2O per ASHRAE 193
Specifications & Manuals
Product documentation includes condenser and air handler technical specifications, submittal data, installation instructions, and warranty information to assist with equipment selection, permitting, installation, and service.
Frequently Asked Questions
Why is this rated 14.8 SEER2 when the 3.5 ton is 15.2?
SEER2 is certified for each specific outdoor and indoor combination. Pushing 4 tons of capacity through the same coil and blower family raises airflow and pressure drop, which lowers the measured seasonal efficiency slightly. Both ratings are above the federal minimum for the Southeast.
Can this system be used in a commercial space?
Four tons on 208-230V single phase is a common light commercial size for small retail, office, and restaurant spaces. Commercial installations often carry different code requirements for outside air, economizers, and equipment access, so verify with your local authority having jurisdiction.
Is the air handler the same as the 3.5 ton system?
Yes. The RH2TY4821STANNJ serves both the 3.5 and 4 ton packages. Only the outdoor unit, line set sizing, and electrical sizing change between the two, which is convenient for contractors stocking inventory.
What breaker and wire size does a 4 ton RA14AY need?
Minimum circuit ampacity and maximum overcurrent protection are printed on the unit nameplate and listed in the RA14AY technical specifications above. Size the circuit from those figures, not from tonnage, since they vary by model and voltage.
Does two-stage airflow mean a two-stage compressor?
No. The two-stage designation on the RH2TY refers to the blower's airflow staging. The RA14AY outdoor unit is a single-stage condenser. The pairing still gains comfort benefit from the staged indoor airflow during part-load conditions.
Where do I find other Rheem air handlers if I need a different match?
Our air handler category lists every model we stock, and the Rheem brand page covers the full equipment line. Substituting an indoor unit changes the AHRI rating, so confirm the new pairing is certified before ordering.
RA14AY Technical SpecificationsRheem Condenser BrochureRA14AY Submittal SheetRH2TY Technical SpecificationsRH2TY Installation InstructionsRH2TY Submittal SheetRheem Warranty Certificate
