EcoTemp 80% Single Stage 70K BTU Gas Furnace, WFER070B048C
The WFER070B048C answers a specifically Southern problem: a house that needs four tons of cooling but only a modest amount of heat. It pairs 66,000 BTUH of natural gas input at 80.00% AFUE with a 4 ton blower in a 17-1/2 in. cabinet — the only combination in the EcoTemp WFER range that puts a 48,000 BTU/hr cooling-size blower behind the smallest practical burner assembly. Everything else is standard WFER: four-position multipoise installation, hot surface ignition, an electronic control center with LED diagnostics and self-test, and a WhiteRodgers redundant gas valve on a 1/2 in. NPT connection.
Is a 70K BTU Gas Furnace the Right Size?
In Florida, the Gulf Coast, South Texas and the desert Southwest, the cooling load routinely runs two to three times the heating load. Sizing the furnace to the heat loss produces a 66,000 BTUH unit; sizing the blower to the air conditioner produces a 4 ton requirement. Most furnace lines force a compromise — oversize the burner to get the blower, or undersize the blower and starve the coil. The 070B048 is the size that lets both be correct at once.
Because this model is not in the currently attached technical specifications sheet, treat published airflow figures with care and confirm the speed tap data against the current ICP product data for your specific unit. What is certain from the nomenclature is the configuration: 070 is 66,000 BTUH input, B is the 17-1/2 in. cabinet, and 048 is the 48,000 BTU/hr four-ton cooling size. As always, size the heating side from a calculated heat loss and the air side from the AHRI-certified coil and condenser match.
Ideal for: Sun Belt homes with a heavy cooling load and a light heating load, Florida and Gulf Coast changeouts, 4 ton system matches on 17-1/2 in. plenums, and any job where the blower requirement outruns the burner requirement.
Need more capacity? Step up to the 90K BTU EcoTemp WFER090C048C Gas Furnace, which keeps the 4 ton blower and adds 22,000 BTUH of input in a 21 in. cabinet.
Recommended applications are general guidelines only. Actual furnace selection depends on a calculated heat loss, duct design, venting, gas supply and local code. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Model Number | WFER070B048C — 80% AFUE Single Stage Multipoise Gas Furnace |
|---|---|
| Heating Input | 66,000 BTUH (Natural Gas) |
| Efficiency | 80.00% AFUE |
| Cabinet Width | 17-1/2 in. |
| Cooling Size | Up to 4 Ton / 48,000 BTUH |
| Supply Outlet Width | 15-7/8 in. |
| Bottom Inlet Width | 16 in. |
| Installation Positions | Upflow, Downflow, Horizontal-Left, Horizontal-Right |
| Ignition | Hot Surface Ignition |
| Gas Valve | WhiteRodgers Redundant, 1/2 in. NPT |
| Electrical | 115V-60Hz-1Ph, 40VA Transformer |
| Vent Connection | 4 in. |
| NOx Configuration | Standard (WFEL Is the Low-NOx Variant) |
| Warranty | 1-Year Unit Replacement, 20-Year Heat Exchanger, 5-Year Parts (10-Year with Registration) |
The 17-1/2 in. cabinet takes external bottom filter rack NAHB00601FF with a 16 x 25 in. washable filter, and return air kit NAHA01701RA. Pair the cooling side with a 4 ton coil — the EcoTemp W5AM48M21XA R-454B cased coil is the current option, with a 21 in. casing that needs a transition to this 17-1/2 in. furnace. If the plenum can take 21 in. throughout, the WFER090C048C is the wider-cabinet 4 ton alternative.
Furnace & Blower Features
WFER070B048C Heating & Controls
- 66,000 BTUH natural gas input at 80.00% AFUE
- Monoport burner assembly with hot surface ignition
- Electronic control center with LED diagnostics and self-test feature
- Adjustable heating air temperature rise via blower speed taps
- WhiteRodgers redundant gas valve, 4.5 to 13.6 in. W.C. natural gas inlet
- 1/2 in. NPT gas connection
- Solid state time operation heating blower control
- Propane conversion available via kit AGAGC8NPS01A
- 20-year heat exchanger limited warranty
- Standard NOx build — not for 40 ng/J low-NOx districts
WFER070B048C Cabinet & Airflow
- Only WFER model combining 66,000 BTUH input with a 4 ton blower
- 17-1/2 in. cabinet width for standard plenums and coil cases
- 15-7/8 in. supply outlet, 16 in. bottom inlet width
- 11-9/16 in. top and bottom flue collar
- Five-speed direct drive blower with selectable heating and cooling taps
- Four-position installation: upflow, downflow, horizontal-left, horizontal-right
- 4 in. vent connection, Type B-1 vent compatible
- 40VA transformer with standard air conditioning blower relay
- Cabinet air leakage tested per ASHRAE standard 193
- Takes the 17 in. filter rack NAHB00601FF and return air kit NAHA01701RA
Specifications & Manuals
The attached technical specifications sheet covers the WFEL and WFER family and includes the nomenclature identification guide, clearances, venting and accessory listings that apply to this model. Confirm airflow and blower data for the 070B048 size against the current ICP product data before final selection.
Frequently Asked Questions
Why pair 66,000 BTUH of heat with a 4 ton blower?
Because in hot climates the cooling load and the heating load point at different equipment sizes. Sizing the burner to the heat loss and the blower to the air conditioner is the correct answer; this model is the size that allows both without oversizing the furnace.
Is the WFER070B048C listed in the attached specifications sheet?
No. The attached WFEL/WFER product data lists 070A036, 070B036 and 070C048. The configuration is confirmed by the nomenclature guide — 070 is 66,000 BTUH, B is 17-1/2 in., 048 is the 4 ton cooling size — but detailed airflow and blower data for this size is not in that document.
What cabinet width does the 070B048 use?
17-1/2 in., with a 15-7/8 in. supply outlet and a 16 in. bottom inlet. B is the manufacturer's cabinet width code for 17-1/2 in. across the whole WFEL/WFER family.
Which cased coil matches a 4 ton WFER070B048C?
Any AHRI-certified 4 ton coil for your outdoor unit. The current R-454B option is the EcoTemp W5AM48M21XA, whose 21 in. casing is wider than this furnace, so budget for a transition or a coil adapter kit.
Does the larger blower change the heating output?
No. Heating output is a function of input and AFUE, not blower size. What the larger blower changes is airflow — and therefore the temperature rise across the heat exchanger, which is set at commissioning by selecting the correct speed tap.
What does each character of WFER070B048C mean?
WF is gas furnace, E is mid efficiency, R is standard NOx (L would be low NOx), 070 is 66,000 BTUH heating input, B is the 17-1/2 in. cabinet width, 048 is the 48,000 BTU/hr four-ton cooling size, and the trailing characters are the sales and extra digits.
WFER Technical Specifications
