Firman H03655 vs WEN DF475T
What is the difference?
The Firman H03655 has 3.65 kW of running power, 4.55 kW peak. The WEN DF475T has 3.8 kW of running power, 4.75 kW peak.
Both are dual-fuel.
The Firman H03655 runs 14 h at half load, the WEN DF475T runs 11 h at half load. The Firman H03655 runs longer on a tank.
The Firman H03655 has a 5 gal tank, the WEN DF475T has a 4 gal tank.
The Firman H03655 has a 3-year warranty, the WEN DF475T has a 2-year warranty.
The Firman H03655 has 120 V AC output, the WEN DF475T 120/240 V. Only 240 V output can run 240 V loads such as many well pumps, dryers and central AC.
Specs side by side
| Firman H03655 | WEN DF475T | |
|---|---|---|
| Running W | 3650 | 3800 |
| Peak W | 4550 | 4750 |
| Fuel | dual-fuel | dual-fuel |
| Tank (gal) | 5 | 4 |
| Run time @50 % (h) | 14 | 11 |
| Noise (dB) | 67 | — |
| CO shutoff | — | — |
| Weight (lb) | 112 | — |
| Warranty (yr) | 3 | 2 |
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Specs as read from manufacturer pages on 2026-11-04 / 2026-10-25. Specs one maker does not list are left out of the comparison. Sponsored links; we may earn a commission.
Common questions
Which has the longer warranty, Firman H03655 or WEN DF475T?
The Firman H03655. Longer warranty: 3 years vs 2 years.