Firman T04073 vs WEN DF475T
What is the difference?
The Firman T04073 has 4 kW of running power, 5 kW peak. The WEN DF475T has 3.8 kW of running power, 4.75 kW peak.
The Firman T04073 is tri-fuel, the WEN DF475T is dual-fuel.
The Firman T04073 runs 14 h at half load, the WEN DF475T runs 11 h at half load. The Firman T04073 runs longer on a tank.
The Firman T04073 has a 5 gal tank, the WEN DF475T has a 4 gal tank.
Both have 120/240 V AC output.
Specs side by side
| Firman T04073 | WEN DF475T | |
|---|---|---|
| Running W | 4000 | 3800 |
| Peak W | 5000 | 4750 |
| Fuel | tri-fuel | dual-fuel |
| Tank (gal) | 5 | 4 |
| Run time @50 % (h) | 14 | 11 |
| Noise (dB) | — | — |
| CO shutoff | yes | — |
| Weight (lb) | — | — |
| Warranty (yr) | — | 2 |
| Check on Amazon → | Check on Amazon → |
Specs as read from manufacturer pages on 2026-10-30 / 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 more running watts, Firman T04073 or WEN DF475T?
The Firman T04073. More running watts: 4000 W vs 3800 W.