4 Ton GrandAire 16.5 SEER2 R454B Side Discharge Inverter Heat Pump System, W5H9V48AKAAA, WCVL605CD
Larger homes get dependable year-round comfort from this AHRI-certified GrandAire match (AHRI 218160679). It pairs the W5H9V48AKAAA 4 ton side discharge inverter heat pump with the WCVL605CD variable speed air handler, which uses Grandaire's large 24.5-inch cabinet for the 4 and 5 ton systems. Rated 16.5 SEER2, 10.5 EER2, and 9.5 HSPF2, the system modulates from 15,600 to 51,000 BTU/h in cooling and up to 57,300 BTU/h in heating on R-454B. Our recommended control is the GrandAire WKJR120NX6W Smart Wi-Fi Communicating Wired Thermostat, which links to the system for two-way communication and lets you adjust comfort from your phone. If you'd rather use a third-party 24V thermostat, the system will still run, but its communication features are not available. Shop all complete HVAC systems.
Is a 4 Ton Heat Pump System the Right Size?
Four tons generally suits larger single-family homes, two-story houses on one system, and homes with high ceilings or lots of glass. This inverter system can run as low as about 15,600 BTU/h, so it stays efficient during the many hours each year when the load is far below peak.
Confirm the size with a heat-loss/heat-gain calculation, and check that the ductwork can deliver the airflow a 4 ton system needs. In cold climates, size backup heat against the home's load at your winter design temperature. The WCVL605CD accepts 10kW and 15kW GrandAire heat strips.
Ideal for: Larger homes, two-story houses served by one system, and higher-load replacements that need strong heat pump output plus room for 10kW or 15kW of backup heat.
Recommended control: Add the WKJR120NX6W Wi-Fi communicating thermostat for app control and full communication. Third-party 24V thermostats work, but communicating features are lost.
Need more capacity? Step up to the 5 Ton GrandAire 16 SEER2 Inverter Heat Pump System, W5H9V60AKAAA, WCVL605CD for the largest homes.
Recommended applications are general guidelines only. Actual system requirements depend on insulation, climate, duct design, window area, and occupancy. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Outdoor Heat Pump | W5H9V48AKAAA — 4 Ton Side Discharge Inverter Heat Pump |
|---|---|
| Indoor Air Handler | WCVL605CD — 4-5 Ton Variable Speed Multi-Position Air Handler |
| AHRI Reference | 218160679 |
| Efficiency | 16.5 SEER2 / 10.5 EER2 / 9.5 HSPF2 |
| Refrigerant | R-454B |
| Compressor | Inverter Rotary Compressor |
| Recommended Thermostat | GrandAire WKJR120NX6W Smart Wi-Fi Communicating Wired Thermostat (optional add-on) |
| Electrical | Outdoor 208/230V 1 Ph (MCA 38, MOP 40); Indoor 115/208/230V 1 Ph (MOP 15) |
| Optional Add-Ons | 10kW or 15kW breakered heat strip; 25' or 50' 3/4" x 3/8" line set; flush kit |
This system includes one W5H9V48AKAAA outdoor heat pump and one WCVL605CD air handler. The WCVL605CD's ECM blower is configured for 4 ton airflow when paired with this outdoor unit. Optional heat strips, copper line sets, a flush kit, and the WKJR120NX6W controller can be added from the choices above.
Heat Pump & Air Handler Features
W5H9V48AKAAA Outdoor Heat Pump
- Up to 57,300 BTU/h of heating capacity
- 15,600–51,000 BTU/h cooling modulation
- 16.5 SEER2, 10.5 EER2, and 9.5 HSPF2
- Side discharge cabinet, 38.39" tall
- Heating and cooling from -22°F to 122°F
- 65 dBA outdoor sound level
- Crankcase heater and chassis heater standard
- Flare connections, 3/8" liquid and 3/4" gas
WCVL605CD Indoor Air Handler
- 750 W constant-airflow ECM 2.0 blower
- 24.5" multi-position cabinet for 4 and 5 ton systems
- Electronic expansion valve and all-aluminum coil
- Two-way communicating link to the WKJR120NX6W Wi-Fi controller
- Works with third-party 24V thermostats in non-communicating mode
- Approved for 10kW and 15kW GrandAire heat strips
- Thermostat-enabled dehumidification setting
- Filter rack included
Specifications & Manuals
Documentation includes 4 ton system performance data, parts lists for the outdoor and indoor units, and complete installation and service manuals for both units.
Frequently Asked Questions
Can I control the 4 ton GrandAire system from my phone?
Yes, with the recommended GrandAire WKJR120NX6W Smart Wi-Fi Communicating Wired Thermostat, available as an option on this page. A standard 24V thermostat will run the system but won't provide the communicating features.
Which backup heat option is best for a 4 ton system in a cold climate?
The WCVL605CD accepts the 10kW WEAH10EAA or 15kW WEAH15EAA breakered heat strip. For colder regions or larger homes, 15kW gives more emergency heat. Base the final choice on a load calculation.
What SEER2, EER2, and HSPF2 does this 4 ton matchup achieve?
The W5H9V48AKAAA and WCVL605CD combination is rated 16.5 SEER2, 10.5 EER2, and 9.5 HSPF2 under AHRI reference 218160679.
Is this a good replacement for an old 4 ton R-22 or R-410A system?
Yes. It replaces both the outdoor and indoor units with a matched R-454B inverter system. Install a new line set, or flush the existing one, before connecting.
Does the 4 ton system handle humidity well?
Inverter systems run longer at lower speeds, which removes more moisture than short on-off cycles. The WCVL air handler also has a dehumidification setting that can be enabled through the thermostat.
What routine maintenance does the system need?
Replace or clean the air filter regularly, keep the outdoor unit's side discharge path and coil clear of debris, keep the condensate drain flowing, and schedule periodic professional service.
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