
WEN DF472 vs Firman H03654
Comparing the WEN DF472 and Firman H03654 dual-fuel generators. See how their wattage, runtime, weight, and warranty stack up for your needs.
- Firman H03654
- WEN DF472
Comparison Overview
The WEN DF472 and Firman H03654 are both conventional dual-fuel generators that run on gasoline or propane, making them flexible options for home backup or outdoor use. The WEN DF472 edges ahead in raw power with 3800 running watts and 4750 starting watts, compared to the Firman's 3650 running watts and 4550 starting watts. That 150-watt running advantage may not sound like much, but it can make the difference when you're stacking multiple appliances on the same circuit.
Where the Firman H03654 fights back is in runtime and warranty. It delivers 14 hours at 50% load, three hours longer than the WEN's 11-hour runtime at the same load. The Firman also comes with a 3-year warranty versus the WEN's 2-year coverage, which adds peace of mind for buyers who plan to rely on their generator frequently. The Firman does produce a measured 67 dB of noise, which is about as loud as a normal conversation from a few feet away.
Weight is another consideration. The WEN DF472 comes in at 103.2 lbs, roughly 16 pounds lighter than the Firman's 119.5 lbs. If you need to load your generator into a truck bed or move it around a property regularly, that difference adds up. Buyers who prioritize power and portability may lean toward the WEN, while those who value longer runtime and a stronger warranty may prefer the Firman.
Key takeaways
- WEN DF472 delivers 3800 running watts and 4750 starting watts for more power headroom
- Firman H03654 runs up to 14 hours at 50% load, three hours longer than the WEN
- WEN DF472 weighs 103.2 lbs, about 16 pounds lighter than the Firman at 119.5 lbs
- Firman H03654 includes a 3-year warranty compared to the WEN's 2-year coverage
- Both generators offer dual-fuel capability for gasoline or propane operation
Best use cases
Choose the WEN DF472 if you need a bit more power headroom and a lighter, more portable package. With 3800 running watts and 4750 starting watts, it can handle demanding loads like a small air conditioner, a refrigerator, and several lights simultaneously with a little room to spare. At just over 103 lbs, it's noticeably easier to transport than the Firman, which matters if you're hauling it to a tailgate, a remote work site, or repositioning it around your property during an outage. The tradeoff is a shorter runtime of 11 hours at half load, so you'll be refueling more often during extended power outages. The 2-year warranty is also shorter, so you're accepting a bit more long-term risk.
Choose the Firman H03654 if longer runtime and warranty protection are higher on your list. Its 14-hour runtime at 50% load means fewer middle-of-the-night refueling trips during a storm, and the 3-year warranty gives you an extra year of manufacturer backing. The Firman's 3650 running watts are still plenty for most essential home backup needs, including a fridge, sump pump, lights, and phone chargers. It does weigh nearly 120 lbs, so plan on keeping it relatively stationary or having a second person help you move it. At 67 dB, it's comparable to many generators in this class, though it won't be whisper-quiet by any stretch.
Both generators offer dual-fuel flexibility, which is a genuine advantage during emergencies when gasoline may be hard to find. Neither is an inverter generator, so they're not ideal for sensitive electronics like laptops or medical devices without a separate surge protector or power conditioner.
Verdict & recommendation
If your priority is squeezing out every available watt and keeping the weight manageable, the WEN DF472 is the stronger pick with its 3800 running watts and 103-lb frame. If you'd rather have a generator that runs longer between fill-ups and comes with an extra year of warranty coverage, the Firman H03654 earns its keep with 14 hours of runtime and 3-year protection.
The power gap between these two is modest (150 running watts), and both share the convenience of dual-fuel operation. Your decision really comes down to whether you value portability and peak output or endurance and warranty length. Either generator will handle essential home backup duties capably, so let your specific situation guide the choice.
Last updated March 18, 2026
| Specification | Firman H03654 | WEN DF472 |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Dual-Fuel | Dual-Fuel |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | Yes | No |
| Running watts | 3650 W | Winner: Winner: 3800 W |
| Starting watts | 4550 W | Winner: Winner: 4750 W |
| Noise (lower limit) | Winner: Winner: 67 dB | 0 dB |
| Weight | 119.5 lbs | Winner: Winner: 103.2 lbs |
| Run time @50% load | Winner: Winner: 14 h | 11 h |
| Run time @25% load | Not available | Not available |
| Fuel tank | 5 gal | 4 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 24.7 x 21.8 x 21.6 | 23.1 x 17.5 x 18.5 |
| Electrical | ||
| Voltage (AC) | 120V 60 Hz | 120/240 |
| Voltage (DC) | Not available | 12 |
| GFCI outlets | No | No |
| Covered outlets | Yes | No |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 25 % | Not available |
| Engine | ||
| Engine | 208 cc Firman Max-Pro Series OHV 4-stroke, cast iron sleeve | 224 cc OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric | Recoil |
| Warranty | ||
| Warranty | 3 years | 2 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 3650 W | 3800 W |
| Starting watts | 4550 W | 4750 W |
| Running amps (120V) | Not available | Not available |
| Running amps (240V) | Not available | Not available |
| Peak amps (120V) | Not available | Not available |
| Peak amps (240V) | Not available | Not available |
| Run time @50% load | 14 h | 11 h |
| Run time @25% load | Not available | Not available |
| Propane | Not available | Not available |
| Running watts | 3300 W | 3500 W |
| Starting watts | 4100 W | Not available |
| Running amps (120V) | Not available | Not available |
| Running amps (240V) | Not available | Not available |
| Peak amps (120V) | Not available | Not available |
| Peak amps (240V) | Not available | Not available |
| Run time @50% load | Not available | Not available |
| Run time @25% load | Not available | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | false | false |
| Compliance | EPA, ANSI/PGMA G300-2023 | EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Floating | true |
| UPC | 840876136546 | 44459994725 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 3650 | 3800 |
| Running Watts (Propane) | 3300 | 3500 |
| Starting Watts (Gasoline) | 4550 | 4750 |
| Starting Watts (Propane) | 4100 | Not available |
| Runtime @ 50% Load (Gasoline) | 14 | 11 |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R); 1x 120V 30A (L5-30R); 1x 120V 30A (TT-30R) | 1x Duplex 120V 20A (5-20R) GFCI; 1x 120/240V 30A (L14-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | Max-Pro Series OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 208 | 224 |
| Cylinder Sleeve | cast iron sleeve | Not available |
| Runtime & fuel system | ||
| Runtime @ 50% Load (Gasoline) | 14 | 11 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection, CO monitoring | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | No |
| Included equipment | ||
| Starting Components | Recoil, Electric | Not available |
| Included Accessories | Oil, funnel, tool kit, propane hose, battery, and wheel kit | Oil and propane hose |
| Warranty & identification | ||
| Commercial Warranty | 3 | 2 |
| Additional specs | ||
| Summary | The Firman H03654 is a 3650-watt dual-fuel generator built for users who need flexible fuel options and moderate runtime between refueling cycles. Running on gasoline, it delivers 3650 watts continuously and 4550 watts at startup, which means it can power a refrigerator, microwave, and several lights simultaneously, or run a table saw and air compressor on a job site. On propane, output drops to 3300 watts running and 4100 watts starting, trading some power for the convenience of bottled fuel storage. The dual-fuel capability matters most during emergencies when one fuel type may be scarce, or for users who prefer propane's longer shelf life for seasonal equipment. At 119.5 pounds with a wheel kit included, this unit sits at the threshold between portable and stationary. It moves, but moving it requires planning. | The WEN DF472 is a 4,750-watt dual fuel portable generator capable of running on both gasoline and propane, making it versatile for various power needs. |
- Most PowerfulWEN DF4723800W running
- QuietestFirman H0365467 dB
- Longest RuntimeFirman H0365414h at 50% load


