3 Ton EcoTemp 13.4 SEER2 R-454B Straight Cool Package Unit WPA536A000RKB
Three tons is the most common size for single-family homes, and the EcoTemp WPA536A000RKB handles it with 34,400 BTUh of rated cooling and 1,150 CFM of airflow at 13.4 SEER2. This straight cool package unit moves up to the larger WPA5 cabinet, with a 2-row, 5.6 sq ft indoor coil. Factory-charged R-454B and a leak detection dissipation system are standard. With electric heater options up to 15 kW, it suits homes and small commercial spaces in hot climates where cooling is the priority. Explore more 3 ton straight cool package units.
Is a 3 Ton Straight Cool Package Unit the Right Size?
A 3 ton unit fits cooling loads of about 34,000 to 36,000 BTUh, typical of many 1960s-to-today family homes depending on insulation, shading, and layout. Two homes of the same square footage can need very different capacity. A shaded, well-sealed home may need less, while one with west-facing glass or attic ducts may need more. A load calculation is the best way to confirm.
Because it is straight cool, the WPA536A000RKB relies on an optional electric heater for winter warmth. In Florida, Texas, and Arizona, a 5 kW heater often covers occasional cold days. For cooler climates, a gas or heat pump package unit may be more economical. Any heater on this size requires at least 1,200 CFM of airflow.
Ideal for: Typical 3 ton single-family homes and manufactured homes in warm climates, plus small restaurants, salons, and offices needing reliable straight cool performance.
Need more capacity? Step up to the 3.5 Ton EcoTemp Straight Cool Package Unit WPA542A000RKB for another half ton of cooling.
Recommended applications are general guidelines only. Actual system requirements depend on insulation, ductwork, climate, window area, occupancy, and a proper load calculation. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Package Unit | WPA536A000RKB: 3 Ton Single-Packaged Air Conditioner (Straight Cool) |
|---|---|
| Cooling Capacity | 34,400 BTUh Rated (36,000 BTUh Nominal), 1,150 CFM |
| Efficiency | 13.4 SEER2 / 11.05 EER2 |
| Refrigerant | R-454B, Factory Charged, with Leak Detection Dissipation System |
| Compressor | Scroll Compressor |
| Optional Electric Heat | 5, 7.2, 10, or 15 kW Heater (Sold Separately) |
| Airflow Configuration | Convertible Downflow or Horizontal, Insulated Horizontal Duct Covers Included |
| Electrical | 208/230V, Single Phase, 60 Hz; 22.9 MCA, 35 Amp Max Fuse/Breaker (Without Heater) |
The WPA536A000RKB ships at about 370 lb and fits the CPRFCURB013B00 roof curb. For downflow rooftop installs with round ductwork, the manufacturer offers the NPCONADP002A00 concentric adapter for 18-inch round duct with that curb. Heater options include the 5 kW, 7.5 kW, and 10 kW breakered WPA5 heat strips. Pair it with a simple thermostat such as the TempĕSure TESD22.
Cooling System & Cabinet Features
WPA536A000RKB Cooling System
- 34,400 BTUh rated cooling at 95°F outdoor conditions
- 1,150 CFM nominal airflow, 1/2 HP ECM blower
- 13.4 SEER2 / 11.05 EER2 efficiency
- Scroll compressor rated 14.4 RLA / 86 LRA
- 2-row indoor coil with 5.6 sq ft face area
- 13.6 sq ft outdoor coil with a 26-inch, 3,500 CFM fan
- R-454B with leak detection dissipation, 106 sq ft minimum conditioned space
- Low ambient control available for cooling down to 0°F
- Crankcase heater CPCRKHTR008A00 available
- 75 dBA rated sound level
WPA536A000RKB Cabinet & Installation
- Larger 36–60 cabinet with integrated basepan
- Prewired, pre-piped, and pre-charged
- Downflow or horizontal configuration
- Concentric adapter option for 18-inch round duct on curb installs
- Sloped composite drain pan with external drain
- Galvanized, prepainted cabinet with 500-hour salt spray rating
- Economizers CPECOMZR009A00 (vertical) and CPECOMZR012A00 (horizontal)
- Accepts heaters from 5 to 15 kW
- Cabinet air leakage of 2.0% or less per ASHRAE 193
- Rated for installation up to 10,000 ft elevation
Specifications & Manuals
Product documentation includes WPA5 technical specifications with performance, electrical, electric heater, and accessory data, the product brochure, and EcoTemp warranty terms to assist with equipment selection, installation, and service.
Frequently Asked Questions
How does the 3 ton WPA536A000RKB compare with the 2.5 ton WPA5?
Rated cooling rises from 28,800 to 34,400 BTUh and airflow from 950 to 1,150 CFM, and the unit moves to the larger 36–60 cabinet. Electrical increases to 22.9 MCA with a 35 amp maximum breaker without a heater.
Does the 3 ton WPA5 use a bigger blower motor than the smaller sizes?
It uses a 1/2 HP ECM motor, the same horsepower as the 2 and 2.5 ton models, but with a larger 11x10 blower wheel rated for 1,150 CFM nominal cooling airflow.
Can I connect round ductwork to the WPA536A000RKB on a roof curb?
Yes. The manufacturer offers the NPCONADP002A00 concentric adapter for 18-inch round duct, for use with the CPRFCURB013B00 large roof curb.
What is the largest heater for the 3 ton WPA5?
Size 36 accepts up to a 15 kW heater (CPHEATER133). With it installed, the MCA is 72.5/82.9 amps at 208/230V, and the maximum overcurrent protection is 80/90 amps.
What is the minimum conditioned space for the WPA536A000RKB?
Because R-454B is an A2L refrigerant, the manufacturer lists a minimum conditioned space area of 106 sq. ft. for size 36. A factory-installed leak detection dissipation system is standard.
Is a crankcase heater recommended for the 3 ton WPA5?
A crankcase heater is an optional accessory. For sizes 24–36, the manufacturer lists the CPCRKHTR008A00 240V crankcase heater, which is often used where the unit sits idle in cold weather.
WPA5 Technical Specifications
