4 Ton EcoTemp 14.5 SEER2 110K BTU Single Stage Gas System W5A5S48AKAWA, W5AM48M21XA, WFER110C060C
This pairing puts the largest 21-inch furnace behind a full 4 tons of cooling, and the result is the most capable combination in the C cabinet. The W5A5S48AKAWA condenser provides 48,000 BTU/h of R-454B cooling at 14.5 SEER2, feeding a W5AM48M21XA cased coil rated 1,200 to 2,000 CFM. The five-burner WFER110C060C supplies 110,000 BTU/h input and 90,000 BTU/h output at 80% AFUE, with a 1 HP blower rated to 2,040 CFM. Every part of the airflow path has headroom, which matters on a 4 ton system where 1,600 CFM is the target and real-world duct systems rarely cooperate. It is built for 2,000 to 2,800 square foot homes in four-season and cold climates, and for larger houses with demanding duct layouts.
Is a 4 Ton / 110K BTU Gas System the Right Size?
Forty-eight thousand BTU/h of cooling against 90,000 BTU/h of heat output covers a wide band of northern and mid-latitude homes in the 2,000 to 2,800 square foot range. The heating side is sized for design temperatures in the single digits and below, and the cooling side handles summers that get properly hot. Where a home falls near the boundary between 3.5 and 4 tons, the deciding factors are usually second-floor gain, window area, and how much of the load the ductwork can actually deliver.
Airflow is where this configuration earns its keep. A 4 ton system wants about 1,600 CFM, and the 1 HP blower rated at 2,040 CFM reaches that comfortably even against elevated static pressure from long runs, tight filter racks, or undersized returns. That capability is not a substitute for correct duct design, but it does provide margin in retrofits where the duct system cannot be fully rebuilt. Set cooling airflow deliberately at commissioning rather than leaving the blower at a high tap, and verify temperature rise in heating against the values in the installation instructions.
Ideal for: Four-season and cold-climate homes of roughly 2,000 to 2,800 square feet, two-story houses with a heat-hungry upper floor, homes with long duct runs or high measured static pressure, finished-basement layouts adding heating load, and 4 ton replacements needing maximum heat from a 21-inch cabinet.
Need more capacity? Step up to the 5 Ton EcoTemp 15 SEER2 110K BTU Gas System W5A5S60AKAWA, W5AM61M21XA, WFER110C060C, or reduce the heating side with the 4 Ton EcoTemp 90K BTU Gas System WFER090C048C.
Recommended sizing ranges are general guidelines only. Actual system requirements depend on insulation, window area, air infiltration, duct design, occupancy, and local design temperatures. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Outdoor Condenser | W5A5S48AKAWA — 4 Ton (48,000 BTU) R-454B Single Stage Condenser |
|---|---|
| Indoor Cased Coil | W5AM48M21XA Multi-Position A-Coil with factory-installed TXV, 21 in. cabinet |
| Gas Furnace | WFER110C060C — 110,000 BTU/h input, 90,000 BTU/h output, 80% AFUE, 5 burners |
| Furnace Cabinet Width | 21 in. — maximum heat output available in the C-size cabinet |
| Cooling Efficiency | 14.5 SEER2 (AHRI Certificate 215158041) |
| Refrigerant | R-454B low-GWP (A2L), 5.7 lb factory charge in the condenser |
| Blower / Airflow | 1 HP motor, 2,040 CFM rated cooling airflow, 060 airflow class |
| Coil Airflow Range | 1,200 to 2,000 CFM |
| Gas Type | Natural gas as shipped — LP conversion kit is an optional add-on, not included |
| Electrical | 208-230V, Single Phase, 60 Hz condenser — MCA 29.1A, max fuse 50A |
Against the 90K version of this same 4 ton package, the differences are the burner count, the heat exchanger, and the blower: five burners instead of four, 110,000 BTU/h input instead of 88,000, and a 1 HP motor instead of 1/2 HP with airflow capability rising from 1,445 to 2,040 CFM. Cabinet width does not change, so the installation footprint is identical. The larger gas input may require review of gas pipe sizing and vent capacity, both of which are addressed in the installation instructions. Propane operation uses the EcoTemp AGAGC8NPS01C LP conversion kit, offered as a drop-down option and sold separately. Additional installation materials are listed under equipment add-ons.
Condenser, Coil & Furnace Features
W5A5S48AKAWA Outdoor Condenser
- 48,000 BTU nominal cooling, 14.5 SEER2 in this match
- Single stage hermetic scroll compressor
- R-454B low-GWP A2L refrigerant, 5.7 lb factory charge
- Two-row outdoor coil, 8 refrigerant circuits, 20 fins per inch
- 75 dBA sound rating
- Bonderized galvanized steel cabinet, pre-paint finish
- Post-painted aluminum fins and coated wire grille
- Dense wire safety guards over fan openings
- 7/8 in. vapor and 3/8 in. liquid sweat connections
- MCA 29.1A, 50A maximum fuse, 208-230V single phase
W5AM48M21XA Cased Evaporator Coil
- 4 ton nominal coil on the 21 in. class cabinet
- 1,200 to 2,000 CFM airflow range brackets the 1 HP blower
- Vertical A-coil configuration
- Multi-poise: upflow, downflow, horizontal left or right
- Factory-installed R-454B specific TXV
- R-454B dedicated construction
- Fiberglass-reinforced thermoset polyester condensate pan
- Engineered slope for reliable drainage
- Separate horizontal drain pan provisions
- Burst pressure rating above 2,100 psi
WFER110C060C Gas Furnace
- 110,000 BTU/h input, 90,000 BTU/h output at 80% AFUE
- Five-burner assembly, single stage gas valve
- Largest input rating in the 21 in. C cabinet
- 1 HP blower — the largest motor in the WFER series
- 2,040 CFM rated cooling airflow, 060 airflow class
- Blower certified for cooling systems up to 5 tons
- Extra airflow capability for high-static duct systems
- Upflow, downflow, and horizontal left or right installation
- Category I metal-vented for conventional flues
- 20-year limited heat exchanger warranty
Specifications & Manuals
Product documentation includes condenser and furnace technical specifications, installation instructions for all three components, cased coil literature, and warranty information to assist with equipment selection, installation, and service.
Frequently Asked Questions
Is 2,040 CFM of blower capability genuinely useful on a 4 ton system?
Yes, though not as a running setpoint. A 4 ton system targets roughly 1,600 CFM, and the value of a 2,040 CFM rating is the ability to reach that figure against real duct resistance — restrictive filters, long trunk runs, undersized returns, or multiple elbows. A blower operating well inside its capability also runs quieter and cooler than one near its limit.
Why choose 110,000 BTU input over 88,000 with 4 tons of cooling?
Climate and envelope. The 88,000 BTU/h version produces 72,000 BTU/h of output, appropriate for moderate winters. This one produces 90,000 BTU/h, which is what a 2,600 square foot home in the Upper Midwest or interior Northeast typically needs at design temperature. Cooling capacity and efficiency are identical between the two, so the choice is purely a heating decision.
Does a five-burner furnace change service or maintenance requirements?
The tasks are the same as any 80% AFUE single stage furnace, just across more burners: inspection and cleaning of each burner, flame sensor service, heat exchanger inspection, and verification of manifold pressure and temperature rise. More burners mean more surface to keep clean, so annual service matters, but nothing about the procedure changes relative to a three or four burner model.
Is a 21-inch cabinet adequate at 110,000 BTU input?
It is the design intent — this is the largest furnace built on the C chassis, so the cabinet, heat exchanger, and blower are engineered together at this input. Larger furnaces in the series move to the 24-1/2 inch D cabinet. Service clearances and vent connection geometry still need verification against the installation instructions, particularly where the furnace sits in a closet rather than an open mechanical room.
How much usable heat comes out of 110,000 BTU of input?
Ninety thousand BTU/h. The 80% AFUE rating means roughly 80 percent of the fuel energy becomes usable heat in the airstream, with the balance leaving through the flue. That is the figure to compare against a heating load calculation — input ratings are what the furnace consumes, output ratings are what the house receives, and sizing should always be done on output.
Would a two-stage furnace be a better choice at this heat output?
Two-stage heating offers longer, gentler cycles at part load and marginally better comfort and fuel use in mild weather, at higher equipment cost and complexity. Single stage equipment like this remains the practical choice where budget matters, where the heating load is genuinely large so the furnace spends much of the season near full fire, and where a simple 24V control is preferred. Compare options across our gas furnaces and gas systems range.
W5A5S Technical SpecificationsW5A5S Installation InstructionsW5A5S Customer BrochureWFER Technical SpecificationsWFER Installation InstructionsW5AM Technical SpecificationsW5AM Installation InstructionsICP Warranty Certificate
