FIRMAN · Inverter generator
WH03562OF
4,400 starting watts and 3,500 running watts with propane operation.
$1,199.99
$1,299.99
Direct price snapshot
Visual spec gallery
Core specifications, simplified.
Up to 4,400 starting watts
4,400W starting
Manufacturer runtime
Up to 18 Hrs
Operating volume
69dB @ 1/4 load
Fuel tank
6 Gal
119 Lbs
Unit weight
24.5" x 24.1" x 23"
Unit dimensions
- Warranty
- 3-year warranty
- Certifications
- CARB · CETL · EPA
- Availability
- Available
Starting
Electric, Recoil
Power quality
3% THD
Safety
Low-oil shutdown · CO Alert
Electrical
120 · 60
1 × 5-20R 120V 20A DUPLEX · 1 × L5-30R 120V 30A TWISTLOCK (29.2A/120V/3500W) · 1 × 14-50R 120V/240V 50A (29.2A/120V/3500W) · 1 × USB-A (2.1A/5V DC/10W)
Official product gallery
Product views and FIRMAN infographics.
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Complete specifications
Every official field, organized.
The technical fields below come from FIRMAN’s model-specific specification file. Product photos and infographics come from the official product gallery. Confirm current documentation before purchase.
Manufacturer overview
The FIRMAN WH03562OF delivers fuel-efficient, clean, and renewable power, making it ideal for electronics, sensitive equipment, and extended run times. Whether you're camping, performing, or hosting an outdoor event, this generator provides reliable power when you need it most. With a 6-gallon fuel tank, the WH03562OF runs for up to 22 hours at 25% load, ensuring long-lasting performance. It delivers 4,400 starting watts and 3,500 running watts on gasoline, while propane operation provides 4,000 starting watts and 3,200 running watts. Operating at 120V, this dual-fuel generator gives you flexibility and efficiency in any situation. · · The WH03562OF comes with an engine oil bottle, oil funnel, spark plug wrench, a double open-ended wrench (10mm,12mm), 12V battery cable, LPG regulator with hose holder, L5-30P to TT-30R adaptor, parallel cable, and parallel cable holder.
Specifications · Certifications
- CARB Certified
- Yes
- EPA Certified
- Yes
- cETL Certified
- Yes
- NOM Certified
- No
- ANSI/PGMA G300-2018
- Yes
- UL Certified
- No
Specifications · Output
- Running Watts
- 3500 Gas / 3200 LPG
- Starting Watts
- 4400 Gas / 4000 LPG
- AC Voltage
- 120
- Frequency (Hertz)
- 60
- Decibels
- 69dB @ 1/4 load
- Run Time
- Up to 18 Hrs
- THD @ Full Load
- 3%
Specifications · Control Panel
- Recoil Start
- Yes
- Electric Start
- Yes
- 5-20R 120V 20A DUPLEX
- 1
- L5-30R 120V 30A TWISTLOCK (29.2A/120V/3500W)
- 1
- 14-50R 120V/240V 50A (29.2A/120V/3500W)
- 1
- USB-A (2.1A/5V DC/10W)
- 1
- 12V DC Power Port/Plug (8.3A/12V DC/100W)
- 1
- CO Alert
- Yes
Specifications · Machine
- Low Oil Shutoff
- Yes
- Power Stream Alternator
- Yes
- Cast Iron Sleeve
- Yes
Specifications · Fuel System
- Fuel
- Gas & LPG
- Tank Size
- 6 Gal
- Steel/Plastic
- Steel Gas Tank
Specifications · Wheel Kit
- Wheels
- 9" Never Flat Wheels
- Handle
- Single Folding Handle w/Grip
Packaging · Unit
- UPC
- 840876135624
- Unit Dimensions
- 24.5" x 24.1" x 23"
- Unit Length
- 24.5"
- Unit Width
- 24.1"
- Unit Height
- 23"
- Unit Weight
- 119 Lbs
Packaging · Carton
- Carton Dimensions
- 28.7" x 21.1" x 21.3"
- Carton Length
- 28.7"
- Carton Width
- 21.1"
- Carton Height
- 21.3"
- Carton Weight
- 132 Lbs
- Bonus Items
- L5-30P to TT-30R Adapter
- Bonus Items
- Velcro Strap Hose Holder
Best-fit uses
- Camping
- Home Projects
- Power Outage
- Work
Standout features
- Inverter power
- CO Alert shutdown protection
- Electric, Recoil start
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