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WEN DF472 vs Firman H03654

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

  • Model H03654
    Model H03654

    Firman 3,650W Dual-Fuel Generator

    3650W
    Running
    67 dB
    Noise
    View details
  • Model DF472
    Model DF472

    WEN 3,800W Dual-Fuel Generator

    3800W
    Running
    0 dB
    Noise
    View details
Quick charts
Each chart uses its own Y-axis scale (so numbers are comparable within a chart).
Running watts
W
Starting watts
W
Noise
dB
Runtime @50%
h
Running watts by fuel
Shows how output changes across gasoline/propane/natural gas (when available).
Generator Specifications Comparison
SpecificationFirman H03654WEN DF472
General
Product type
Generator
Generator
Fuel
Dual-Fuel
Dual-Fuel
InverterNoNo
Parallel capableNoNo
RV readyYesNo
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 gaugeYesYes
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 outletsNoNo
Covered outletsYesNo
Automatic Voltage RegulationYesYes
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
GasolineNot availableNot 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
PropaneNot availableNot 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 arrestorYesYes
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 ProtectionYesYes
Carbon Monoxide MonitoringYesNo
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 Powerful
    WEN DF472
    3800W running
  • Quietest
    Firman H03654
    67 dB
  • Longest Runtime
    Firman H03654
    14h at 50% load
Where to buy
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Firman H03654
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WEN DF472
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