Firman H03655 vs Generac iQ5200
What is the difference?
The Firman H03655 has 3.65 kW of running power, 4.55 kW peak. The Generac iQ5200 has 3.9 kW of running power, 5.2 kW peak.
Both are dual-fuel.
The Firman H03655 runs 14 h at half load, the Generac iQ5200 runs 9 h at half load. The Firman H03655 runs longer on a tank.
The Firman H03655 has a 5 gal tank, the Generac iQ5200 has a 3.2 gal tank.
The Firman H03655 weighs 112 lb, the Generac iQ5200 weighs 111 lb.
Specs side by side
| Firman H03655 | Generac iQ5200 | |
|---|---|---|
| Running W | 3650 | 3900 |
| Peak W | 4550 | 5200 |
| Fuel | dual-fuel | dual-fuel |
| Tank (gal) | 5 | 3.2 |
| Run time @50 % (h) | 14 | 9 |
| Noise (dB) | 67 | — |
| CO shutoff | — | yes |
| Weight (lb) | 112 | 111 |
| Warranty (yr) | 3 | — |
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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 more running watts, Firman H03655 or Generac iQ5200?
The Generac iQ5200. More running watts: 3900 W vs 3650 W.
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Compare other models → · All Firman models · All Generac models