Firman W03383 vs WEN DF400iX
What is the difference?
The Firman W03383 has 3.3 kW of running power, 3.65 kW peak. The WEN DF400iX has 3.2 kW of running power, 4 kW peak.
The Firman W03383 runs on gasoline, the WEN DF400iX is dual-fuel.
The Firman W03383 has a 1.8 gal tank, the WEN DF400iX has a 2.2 gal tank.
Both have a 3-year warranty.
Both have 120 V AC output.
Specs side by side
| Firman W03383 | WEN DF400iX | |
|---|---|---|
| Running W | 3300 | 3200 |
| Peak W | 3650 | 4000 |
| Fuel | gasoline | dual-fuel |
| Tank (gal) | 1.8 | 2.2 |
| Run time @50 % (h) | — | 8.5 |
| Noise (dB) | — | 58 |
| CO shutoff | — | yes |
| Weight (lb) | 901 | — |
| Warranty (yr) | 3 | 3 |
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Specs as read from manufacturer pages on 2026-10-26 / 2026-10-31. Specs one maker does not list are left out of the comparison. Sponsored links; we may earn a commission.