EcoTemp 80% Single Stage 70K BTU Gas Furnace, WFER070A036C
The WFER070A036C is the narrowest 70K furnace EcoTemp builds — 66,000 BTUH of input and 54,000 BTUH of output squeezed into a 14-3/16 in. cabinet weighing 114 lb. Three monoport burners fire on hot surface ignition, and a 1/3 HP five-speed blower with an 11 x 8 in. wheel actually delivers more heating airflow than the wider 17-1/2 in. version at 1090 CFM. For a closet, chase or manufactured-home cavity that was framed for a 14 in. furnace but needs real heating capacity, this is the model that avoids demolition.
Is a 70K BTU Gas Furnace the Right Size?
Sixty-six thousand BTUH of input suits typical three-bedroom homes in moderate climates and larger, well-insulated houses further south, delivering 54,000 BTUH at 80.00% AFUE. The blower is rated for up to 3 tons of cooling at 1070 CFM, with 1090 CFM available on the heating tap and a certified temperature rise range of 30°F to 60°F.
What makes this size worth knowing about is the cabinet. Narrow mechanical spaces are common in townhomes, condos, manufactured and modular housing, and older homes with a furnace tucked into a hallway chase. Dropping to a 45K furnace to make the width work leaves the house short on heat; widening the opening means framing, drywall and often a plenum rebuild. The 070A036 removes that trade entirely. Size from a calculated heat loss, then confirm the 12-11/16 in. bottom inlet and 12-9/16 in. supply outlet suit the existing duct connections.
Ideal for: Narrow closets and hallway chases, townhomes and condos, manufactured and modular homes, and any 70K replacement where the opening is 14 in. and cannot be widened.
Need more capacity? Step up to the 90K BTU EcoTemp WFER090B042C Gas Furnace — note it uses a 17-1/2 in. cabinet, since 88,000 BTUH is not offered in the 14-3/16 in. width.
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 | WFER070A036C — 80% AFUE Single Stage Multipoise Gas Furnace |
|---|---|
| Heating Input | 66,000 BTUH (Natural Gas) |
| Heating Output | 54,000 BTUH |
| Efficiency | 80.00% AFUE |
| Cabinet Width | 14-3/16 in. |
| Cooling Size | Up to 3 Ton / 36,000 BTUH |
| Airflow | 1090 CFM Heating / 1070 CFM Cooling |
| Blower Motor | 1/3 HP Direct Drive, 5 Speed, 11 x 8 in. Wheel |
| Burners | 3 Monoport |
| Certified Temperature Rise | 30°F – 60°F |
| Installation Positions | Upflow, Downflow, Horizontal-Left, Horizontal-Right |
| Ignition | Hot Surface Ignition |
| Electrical / Gas Connection | 115V-60Hz-1Ph, 5.6 Max Amps / 1/2 in. NPT |
| Vent Connection | 4 in. |
| Shipping Weight | 114 lb |
| Warranty | 1-Year Unit Replacement, 20-Year Heat Exchanger, 5-Year Parts (10-Year with Registration) |
The 14 in. accessories are external bottom filter rack NAHB00501FF, which includes a 14 x 25 in. washable filter, and return air kit NAHA01401RA in 14-3/16 in. width. The same 66,000 BTUH input is available in a 17-1/2 in. cabinet as the WFER070B036C if width is not a constraint. Match the cooling side with a 3 ton narrow-cabinet cased coil or browse the full cased coil range.
Furnace & Blower Features
WFER070A036C Heating & Controls
- 66,000 BTUH input and 54,000 BTUH output at 80.00% AFUE
- Three monoport burners with hot surface ignition
- Certified temperature rise 30°F to 60°F
- Electronic control center with LED diagnostics and self-test
- WhiteRodgers redundant gas valve, 1/2 in. NPT connection
- Natural gas inlet pressure 4.5 to 13.6 in. W.C., size 43 orifice
- Certified for elevations 0 to 10,000 ft
- Solid state time operation heating blower control
- 20-year heat exchanger limited warranty
- Standard NOx configuration, AHRI certified
WFER070A036C Cabinet & Airflow
- 14-3/16 in. cabinet — the narrowest 70K furnace in the line
- 12-9/16 in. supply outlet, 12-11/16 in. bottom inlet width
- 114 lb shipping weight, 6 lb lighter than the 17-1/2 in. version
- 1/3 HP five-speed direct drive blower, 11 x 8 in. wheel, 4.4 FLA
- 1090 CFM heating and 1070 CFM cooling on as-shipped taps
- Higher heating airflow than the wider 070B036 at the same input
- Certified external static pressure 0.12 heating / 0.50 cooling
- Four-position installation from the same carton
- 4 in. vent connection, Type B-1 vent compatible
- 5.6 max amps, 7.8 ampacity, 15 amp maximum breaker
Specifications & Manuals
Size 070A036 appears in the physical data table alongside 070B036, which makes it straightforward to compare the two 66,000 BTUH options directly. The air delivery chart lists CFM for all five speed taps, and the accessory table confirms the 14 in. filter rack and return air kit part numbers.
Frequently Asked Questions
Is the WFER070A036C the narrowest 70K furnace available?
It is the narrowest in the WFER line. The A designation is the 14-3/16 in. cabinet code, and no other 66,000 BTUH model in the series is built that narrow.
How does it compare with the 45K WFER045A036C?
Identical 14-3/16 in. cabinet and identical 3 ton cooling size. The 070A adds 22,000 BTUH of input, a third burner, an 11 x 8 in. blower wheel instead of 10 x 6, and 380 CFM more heating airflow — for 10 lb more shipping weight.
What heating airflow does the 070A036 deliver?
1090 CFM on the as-shipped heating tap, which is actually higher than the 985 CFM of the wider 070B036. The blue heating tap reaches 1095 CFM at 0.1 in. w.c. external static per the air delivery chart.
What filter rack fits a 14 in. WFER cabinet?
NAHB00501FF, the 14 in. external bottom filter rack, which includes a 14 x 25 in. washable filter. NAHA00506FB is the matching six-pack of 1 in. washable media in 16 x 25.
Can the WFER070A036C be used with a 3 ton air conditioner?
Yes. The 036 digits are the cooling size code — 36,000 BTU/hr, 3 ton — and the blower is rated 1070 CFM on the cooling tap. Match the evaporator coil to the outdoor unit's AHRI-certified combination.
What is the gas connection size?
1/2 in. NPT, the same across the entire WFEL/WFER family regardless of input. Natural gas inlet pressure must be between 4.5 and 13.6 in. W.C. at the valve.
WFER Technical Specifications
