Firman W03383 vs WEN DF451i
What is the difference?
The Firman W03383 has 3.3 kW of running power, 3.65 kW peak. The WEN DF451i has 3.5 kW of running power, 4.5 kW peak.
The Firman W03383 runs on gasoline, the WEN DF451i is dual-fuel.
The Firman W03383 has a 1.8 gal tank, the WEN DF451i 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 DF451i | |
|---|---|---|
| Running W | 3300 | 3500 |
| Peak W | 3650 | 4500 |
| Fuel | gasoline | dual-fuel |
| Tank (gal) | 1.8 | 2.2 |
| Run time @50 % (h) | — | 8.5 |
| Noise (dB) | — | 58 |
| CO shutoff | — | — |
| Weight (lb) | 901 | — |
| Warranty (yr) | 3 | 3 |
| Check on Amazon → | Check on Amazon → |
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 DF451i?
The WEN DF451i. More running watts: 3500 W vs 3300 W.