3.5 Ton EcoTemp 15.5 SEER2 110K BTU Single Stage Gas System W5A5S42AKAWA, W5AM42M21XA, WFER110C060C
This is the most heat-forward pairing in the EcoTemp range's mid-capacity band. The W5A5S42AKAWA condenser handles 42,000 BTU/h of R-454B cooling at 15.5 SEER2 through a two-row, nine-circuit outdoor coil and a W5AM42M21XA cased coil on the 21-inch cabinet. Behind it sits the five-burner WFER110C060C, rated 110,000 BTU/h input and 90,000 BTU/h output at 80% AFUE, with a 1 HP blower and the range's highest airflow rating at 2,040 CFM. A 3.5 ton cooling system with 5 ton blower capability and 90,000 BTU/h of heat is a specific tool: it belongs in cold-climate homes of 1,800 to 2,400 square feet with long or restrictive duct runs, in retrofits where measured static pressure is high, and in houses where the heating load far outruns the cooling load.
Is a 3.5 Ton / 110K BTU Gas System the Right Size?
The heating side carries this configuration. Ninety thousand BTU/h of output is enough for a well-sized home in the coldest parts of the lower 48, while the cooling side stays at 42,000 BTU/h for climates where summers are warm rather than brutal. That combination fits New England, the Upper Midwest, the northern Rockies, and upstate New York far better than it fits the Sun Belt. It is also the pairing to consider when a previous furnace was replaced with something too small and the house never recovered on the coldest nights.
The 1 HP blower deserves separate thought. At 2,040 CFM rated capability it exceeds what 3.5 tons of cooling needs by a wide margin, which is genuinely useful where ducts are undersized, filters are restrictive, or runs are long, because the blower can reach design airflow against higher static pressure. It is not a license to leave airflow at maximum: cooling airflow should be set near 1,400 CFM at commissioning, and in humid regions slightly lower to favor moisture removal. Confirm both loads against local design conditions before committing to this ratio.
Ideal for: Cold-climate homes of roughly 1,800 to 2,400 square feet, New England and Upper Midwest construction, houses with high measured duct static pressure, long duct runs or restrictive filter arrangements, and homes where earlier equipment proved undersized on heating.
Need more capacity? Step up to the 4 Ton EcoTemp 14.5 SEER2 110K BTU Gas System W5A5S48AKAWA, W5AM48M21XA, WFER110C060C, or scale the heating side back with the 3.5 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 | W5A5S42AKAWA — 3.5 Ton (42,000 BTU) R-454B Single Stage Condenser |
|---|---|
| Indoor Cased Coil | W5AM42M21XA 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. — highest heat output offered on the C-size cabinet |
| Cooling Efficiency | 15.5 SEER2 (AHRI Certificate 215096772) |
| Refrigerant | R-454B low-GWP (A2L), 7.2 lb factory charge in the condenser |
| Blower / Airflow | 1 HP motor, 2,040 CFM rated cooling airflow, 060 airflow class |
| Gas Type | Natural gas as shipped — LP conversion kit is an optional add-on, not included |
| Line Connections | 7/8 in. vapor, 3/8 in. liquid |
| Electrical | 208-230V, Single Phase, 60 Hz condenser — MCA 22.7A, max fuse 40A |
The WFER110C060C is the largest furnace built on the 21-inch cabinet, and it brings the biggest blower in the series with it at 1 HP. That is why this configuration reads as unbalanced on paper and makes sense in practice: the same cabinet width as the 88,000 BTU/h version, but 22,000 BTU/h more input, 18,000 BTU/h more output, and roughly 40 percent more airflow capability. Anything beyond this input moves to the 24-1/2 inch D cabinet. Propane conversion requires the EcoTemp AGAGC8NPS01C LP kit, available from the drop-down and not included. Compare the full heating range on our gas furnaces and gas systems page.
Condenser, Coil & Furnace Features
W5A5S42AKAWA Outdoor Condenser
- 42,000 BTU nominal cooling, 15.5 SEER2 in this certified match
- Single stage hermetically sealed scroll compressor
- R-454B low-GWP A2L refrigerant, 7.2 lb factory charge
- Two-row outdoor coil with 9 refrigerant circuits
- 20 fins per inch across the condenser face
- 75 dBA sound rating
- Bonderized galvanized steel cabinet with pre-paint finish
- Post-painted aluminum fins resist corrosion breakdown
- 7/8 in. vapor and 3/8 in. liquid sweat connections
- MCA 22.7A, 40A maximum fuse on 208-230V single phase
W5AM42M21XA Cased Evaporator Coil
- 3.5 ton nominal coil on the 21 in. class cabinet
- 1,050 to 1,750 CFM airflow range
- Vertical A-coil configuration
- Multi-poise for upflow, downflow, and horizontal application
- Factory-installed R-454B specific TXV
- Dedicated R-454B construction
- Fiberglass-reinforced thermoset polyester condensate pan
- Engineered pan slope for complete 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 on a single stage gas valve
- Largest input available in the 21 in. C cabinet
- 1 HP blower motor — the largest in the WFER series
- 2,040 CFM rated cooling airflow, 060 airflow class
- Blower capability rated for cooling systems up to 5 tons
- Upflow, downflow, and horizontal left or right installation
- Category I metal-vented for conventional flue systems
- Factory natural gas configuration, field LP convertible
- 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
Why pair a 110,000 BTU furnace with only 3.5 tons of cooling?
Because in cold climates the heating load can be double the cooling load. A 2,200 square foot home in Minnesota or Vermont may need 90,000 BTU/h of heat output while its cooling load stays near 42,000 BTU/h, since winter heat loss scales with a 70-degree indoor-outdoor difference while summer gain rarely exceeds 20 degrees plus solar. This configuration exists for exactly that asymmetry.
Will the 2,040 CFM blower rating over-airflow the W5AM42M21XA coil?
Only if it is left at a high-speed tap. The coil is rated for 1,050 to 1,750 CFM, and a 3.5 ton system should be commissioned near 1,400 CFM in cooling. The blower's rated maximum is a capability figure, describing what it can achieve against static pressure, not a setting. Proper airflow setup at installation is what makes this pairing work well.
What is the largest heat input available in the 21-inch cabinet?
This one. The WFER110C060C at 110,000 BTU/h input is the top of the C cabinet family, which also includes the 88,000 BTU/h WFER090C048C. Going higher means the 24-1/2 inch D cabinet and the 132,000 BTU/h WFER135D060C. For anyone whose mechanical space tops out at 21 inches, this represents the maximum available heat.
Does a 110,000 BTU input furnace need a larger gas supply or vent than an 88,000 BTU model?
Potentially both. Gas pipe sizing depends on input rating, developed length, and the number of appliances on the line, and a 25 percent increase in input can push an existing pipe run past its capacity. Vent sizing likewise depends on input, vent height, and whether the appliance is common-vented. Both must be checked against the tables in the WFER installation instructions rather than assumed from the previous furnace.
How does the 1 HP blower affect the furnace's 115V electrical requirement?
A larger blower motor draws more current than the 1/3 and 1/2 HP motors used in smaller WFER models, so the dedicated 115V furnace circuit needs to be sized for this unit rather than carried over without review. The exact ampacity and maximum overcurrent protection are stated on the unit rating plate and in the installation instructions, and should be verified against existing wiring before installation.
Is this system suitable for a home with a finished basement that also needs heating?
It is a common application, and the heat-heavy configuration suits it, since conditioned basement space adds heating load with almost no additional cooling load. What matters is duct distribution: basement supply and return runs need to be part of the design rather than an afterthought, and the blower's extra capability helps carry the additional branch runs. See our equipment add-ons for duct and installation accessories.
W5A5S Technical SpecificationsW5A5S Installation InstructionsW5A5S Customer BrochureWFER Technical SpecificationsWFER Installation InstructionsW5AM Technical SpecificationsW5AM Installation InstructionsICP Warranty Certificate
