EcoTemp 4 Ton 15.2 SEER2 AC & 100K BTU 96.3% AFUE Gas Furnace – 21" Cabinet System
This system puts 48,000 BTU of cooling into a 21 in. indoor footprint. The W5A5S48AKAWA 4 ton R-454B condenser runs through a 21 in. W5AM61M21XA cased coil, rated together at 15.2 SEER2 (AHRI 215163259). The WFSX100C060B furnace delivers 97,000 BTU of heat at up to 96.3% AFUE. It's built for larger homes in the South, Southwest, and lower Mid-Atlantic, where cooling sets the tonnage and a 100K furnace covers winter comfort without stepping up to the wider 24-1/2 in. cabinet.
Is a 4 Ton System with a 100K Furnace the Right Size?
A 4 ton system is commonly applied to homes in the 2,000 to 2,500 square foot range, though hot climates, large window walls, and two-story heat gain can push smaller homes into this size. Pairing it with 97,000 BTU of heat output fits climates where heat loss stays below what a 120K furnace would provide.
At 4 tons, the system typically needs around 1,600 CFM of cooling airflow, so return-air capacity matters. Undersized returns are one of the most common causes of high static pressure, noise, and frozen coils at this size. A Manual J load calculation plus a static-pressure check on the existing ducts sets the system up for its rated performance.
Ideal for: Larger homes in hot and mixed climates, two-story homes with heavy upstairs cooling loads, and replacements in mechanical rooms sized for a 21 in. furnace.
Need more capacity? For more winter heat at 4 tons, choose the EcoTemp 4 Ton 120K BTU Gas System (WFSX120D066B).
Recommended applications are general guidelines only. Actual system requirements depend on insulation, ductwork, climate, elevation, and a proper load calculation. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Outdoor Condenser | W5A5S48AKAWA — 4 Ton Single-Stage R-454B Air Conditioner |
|---|---|
| Indoor Coil | W5AM61M21XA — Multipoise Cased A-Coil, 21" Wide, Factory TXV |
| Gas Furnace | WFSX100C060B — 100,000 BTU Input / 97,000 BTU Output Condensing Furnace |
| Furnace Cabinet Width | 21" (35" tall) |
| Cooling Efficiency | 15.2 SEER2 (AHRI 215163259) |
| Heating Efficiency | 96.3% AFUE Upflow & Horizontal / 95% AFUE Downflow |
| Refrigerant | R-454B |
| Compressor | Single-Stage Scroll Compressor |
| Condenser Electrical | 208/230V, Single Phase, 60 Hz — 29.1 MCA, 50A Max Fuse/Breaker |
| Furnace Electrical | 115V, Single Phase, 60 Hz — 16.7 Unit Ampacity, 20A Breaker |
| Manufacturer Warranty | 10-Year Parts with Timely Registration; 20-Year Furnace Heat Exchanger |
The W5AM61M21XA is the tall, 35 in. version of the 21 in. coil, with enough surface for 4 tons of cooling and a width that matches the WFSX100C060B furnace. Stacked, the two stand about 70 in. before the plenum, so confirm overhead room in closets and basements. Browse the full 4 ton 92%+ AFUE gas system lineup, and set the condenser on a level condenser pad.
Condenser, Coil & Furnace Features
W5A5S48AKAWA Condenser & W5AM61M21XA Coil
- 48,000 BTU scroll compressor rated 22.4 RLA
- Two-row, 20 fins-per-inch condenser coil with eight circuits
- 1/5 HP direct-drive fan at 1,100 RPM, moving 3,100 CFM
- 5.7 lb factory R-454B charge for a 15 ft line set
- 7/8 in. vapor valve and rated vapor line, 3/8 in. liquid
- 8°F subcooling charging target with the TXV coil
- W5AM61M21XA: 35 in. tall, 21 in. wide, about 89 lb
- 7/8 in. suction connection and refrigerant-specific factory TXV
- Sloped FRTP condensate pans for upflow, downflow, or horizontal
- Factory A2L sensor and harness, with a dissipation control board in the parts box
WFSX100C060B 100K BTU Condensing Furnace
- 96.3% AFUE upflow and horizontal; 95.0% downflow
- 97,000 BTU output from five burners
- 21 in. "C" cabinet, 35 in. tall
- 1 HP ECM blower with up to 2,145 CFM cooling airflow
- Rated cooling static pressure of 0.50 in. w.c.
- Factory-set 90-second cooling off-delay, adjustable
- Insulated heat exchanger compartment and a stainless secondary heat exchanger
- Four-position installation with multiple venting options
- Quarter-turn door knobs and slide-out heat exchanger and blower
- Approved for manufactured housing with the accessory kit
Specifications & Manuals
Documentation includes condenser, coil, and furnace product data, installation instructions, line-set and venting tables, wiring diagrams, and warranty terms for selection, installation, and service.
Frequently Asked Questions
Is 100K BTU of heat enough for a 4 ton home?
In warm and mixed climates it often is. The furnace delivers 97,000 BTU per hour. Homes with higher heat loss, such as those in cold northern regions, should compare the 4 ton 120K system.
How tall is the 4 ton coil and furnace stack?
The W5AM61M21XA coil is 35 in. tall and the WFSX furnace is 35 in. tall, about 70 in. combined before the supply plenum. Both are 21 in. wide.
What breaker size does the 4 ton condenser need?
The W5A5S48AKAWA lists a 29.1 minimum circuit ampacity and a 50 amp maximum time-delay fuse or breaker on 208/230V single phase.
When does the 4 ton condenser need a crankcase heater?
The manufacturer requires a crankcase heater for low-ambient cooling and long-line applications, and suggests one for commercial use. It keeps compressor oil warm during off cycles to reduce the risk of liquid slugging.
What does "61" mean in the W5AM61M21XA model number?
In W5AM nomenclature, 60–62 identifies the 5 ton nominal coil family, "M" means the dissipation kit is included, and "21" is the 21 in. cabinet width. This coil is AHRI-certified with the 4 ton W5A5S48AKAWA in this system.
How much refrigerant is factory-charged in the 4 ton outdoor unit?
The W5A5S48AKAWA ships with 5.7 lb of R-454B, sized for 15 ft of 3/8 in. liquid line. Adjust charge for longer runs using the manufacturer's oz-per-foot table.
W5A5S Technical SpecificationsW5A5S Installation InstructionsW5A5S Customer BrochureW5AM Technical SpecificationsW5AM Installation InstructionsWFSX Technical SpecificationsWFSX Installation Instructions
ICP Warranty Certificate
