Firman W03383 vs WEN DF402iX
What is the difference?
The Firman W03383 has 3.3 kW of running power, 3.65 kW peak. The WEN DF402iX has 3.5 kW of running power, 4 kW peak.
The Firman W03383 runs on gasoline, the WEN DF402iX is dual-fuel.
The Firman W03383 has a 3-year warranty, the WEN DF402iX has a 2-year warranty.
Both have 120 V AC output.
Specs side by side
| Firman W03383 | WEN DF402iX | |
|---|---|---|
| Running W | 3300 | 3500 |
| Peak W | 3650 | 4000 |
| Fuel | gasoline | dual-fuel |
| Tank (gal) | 1.8 | — |
| Run time @50 % (h) | — | — |
| Noise (dB) | — | — |
| CO shutoff | — | yes |
| Weight (lb) | 901 | — |
| Warranty (yr) | 3 | 2 |
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Specs as read from manufacturer pages on 2026-10-26 / 2026-10-27. Specs one maker does not list are left out of the comparison. Sponsored links; we may earn a commission.
Common questions
Which has more running watts, Firman W03383 or WEN DF402iX?
The WEN DF402iX. More running watts: 3500 W vs 3300 W.
Which has the longer warranty, Firman W03383 or WEN DF402iX?
The Firman W03383. Longer warranty: 3 years vs 2 years.
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