Whisper Series Open Frame 4400 Watts Generator Model WH03562OF
The FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT is a dual-fuel generator offering 4400 starting watts, 3500 running watts, and a fuel-efficient 6.0-gallon/23-liter tank. Enjoy up to 18 hours runtime at 50% load with its 208cc OHV engine, featuring clean power technology, carbon monoxide shutdown, and a solid 3-year warranty.
Image displaying a list of items included with the FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT: LPG hose, battery, padded handle, wheels, parallel cable, charger cable, engine oil, oil funnel, and tool kit. This fuel-efficient model comes with all essentials illustrated with icons for clean power use.
Image showing bonus items for a fuel-efficient FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT: a hose holder and an L5-30P to TT-30R adapter, highlighted in yellow boxes against a dark background.
Outside, a person operates a table saw using the fuel-efficient Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT by FIRMAN Power Equipment. The yellow portable generator sits on gravel near a wooden structure surrounded by trees.
A yellow and black FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT portable generator is positioned outdoors on a dirt ground, near trees and wooden shelves with kayaks stored on them. This fuel-efficient unit ensures clean power for your outdoor adventures.
The yellow and black portable Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT generator boasts multiple outlets and control switches neatly organized on the front panel. Displaying the "FIRMAN Power Equipment" brand prominently at the top, this fuel-efficient unit features large wheels for enhanced mobility.
Front view of the FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT portable generator with yellow housing, displaying specifications: 4200 starting watts, 3650 running watts, 3800 starting watts using propane, and 3300 running watts using propane. Known for its clean power and fuel-efficient performance.
A fuel-efficient yellow and black FIRMAN Power Equipment portable generator, the Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT, with visible engine components and mounted on two wheels for easy transport.
Rear view of a FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT portable generator with a 208cc engine, showcasing its control panel, fuel-efficient design, frame, and two wheels for mobility.
A yellow and black FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT portable generator with various outlets and a handle, placed on a paved surface near greenery and a building, provides clean power in a fuel-efficient manner.
Top view of the fuel-efficient FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT in striking yellow and black, adorned with various warning labels and instructions on its surface.
A yellow and black portable generator with a handle and wheels, the Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT offers clean power via multiple outlets and control panels. This fuel-efficient unit is labeled "FIRMAN Power Equipment" and includes various switches and connectors.
A yellow and black Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT portable generator from FIRMAN Power Equipment with wheels, featuring various control panels and outlets, provides clean power with fuel-efficient operation.
A yellow and black FIRMAN Power Equipment portable generator, the fuel-efficient Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT comes with wheels and a handle. It displays 4200 starting watts and 3650 running watts, offering clean power suitable for providing backup power.
A yellow-and-black FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT, offering clean power. It is mounted on a metal frame with two large wheels for mobility.
Whisper Series Open Frame 4400 Watts Generator Model WH03562OF
The FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT is a dual-fuel generator offering 4400 starting watts, 3500 running watts, and a fuel-efficient 6.0-gallon/23-liter tank. Enjoy up to 18 hours runtime at 50% load with its 208cc OHV engine, featuring clean power technology, carbon monoxide shutdown, and a solid 3-year warranty.
Image displaying a list of items included with the FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT: LPG hose, battery, padded handle, wheels, parallel cable, charger cable, engine oil, oil funnel, and tool kit. This fuel-efficient model comes with all essentials illustrated with icons for clean power use.
Image showing bonus items for a fuel-efficient FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT: a hose holder and an L5-30P to TT-30R adapter, highlighted in yellow boxes against a dark background.
Outside, a person operates a table saw using the fuel-efficient Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT by FIRMAN Power Equipment. The yellow portable generator sits on gravel near a wooden structure surrounded by trees.
A yellow and black FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT portable generator is positioned outdoors on a dirt ground, near trees and wooden shelves with kayaks stored on them. This fuel-efficient unit ensures clean power for your outdoor adventures.
The yellow and black portable Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT generator boasts multiple outlets and control switches neatly organized on the front panel. Displaying the "FIRMAN Power Equipment" brand prominently at the top, this fuel-efficient unit features large wheels for enhanced mobility.
Front view of the FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT portable generator with yellow housing, displaying specifications: 4200 starting watts, 3650 running watts, 3800 starting watts using propane, and 3300 running watts using propane. Known for its clean power and fuel-efficient performance.
A fuel-efficient yellow and black FIRMAN Power Equipment portable generator, the Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT, with visible engine components and mounted on two wheels for easy transport.
Rear view of a FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT portable generator with a 208cc engine, showcasing its control panel, fuel-efficient design, frame, and two wheels for mobility.
A yellow and black FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT portable generator with various outlets and a handle, placed on a paved surface near greenery and a building, provides clean power in a fuel-efficient manner.
Top view of the fuel-efficient FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT in striking yellow and black, adorned with various warning labels and instructions on its surface.
A yellow and black portable generator with a handle and wheels, the Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT offers clean power via multiple outlets and control panels. This fuel-efficient unit is labeled "FIRMAN Power Equipment" and includes various switches and connectors.
A yellow and black Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT portable generator from FIRMAN Power Equipment with wheels, featuring various control panels and outlets, provides clean power with fuel-efficient operation.
A yellow and black FIRMAN Power Equipment portable generator, the fuel-efficient Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT comes with wheels and a handle. It displays 4200 starting watts and 3650 running watts, offering clean power suitable for providing backup power.
A yellow-and-black FIRMAN Power Equipment Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT, offering clean power. It is mounted on a metal frame with two large wheels for mobility.
01/01
Certification: Certification cETL Certification EPA
Model: wh03562of

Dual Fuel Open Frame Inverter 4400W Electric Start with CO ALERT
$849.99 USD $1,299.99 USD
Free Shipping on all Generators
SERIES Hybrid
TYPE Inverter

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.

**This product is not certified to ship to California.

LEGENDARY FIRMAN ENGINEERING

  • 208cc max pro series engine
  • Recoil start 
  • Electric start 
  • Low oil shut off
  • Cast iron sleeve
  • Running watts 3500W (GAS), 3200W (LPG)
  • Starting watts 4400W (GAS), 4000W (LPG)
  • 120 volts

PERFORMANCE IN A LEAGUE OF ITS OWN

  • 6-gallon tank
  • Up to 22 hours of run time at 25% load
  • Weight: 119 lbs
  • 67dB ¼ load

FEATURES YOU EXPECT FROM FIRMAN

3-year warranty

New CO alert technology

Multi-featured control panel with covered outlets

  • 1 x 5-20R 120V 20A DUPLEX
  • 1 x L5-30R 120V 30A TWIST LOCK
  • 1 x 14-50R 120V/240V 50A
ENGINEERED IN THE USA

FIRMAN generators are made to endure every condition from cold winter nights to hot summer days to everything in between.

Industry-Leading Warranty

New FIRMAN generators are backed by a 3-year warranty. Refurbished generators have a limited 90 day warranty

Customer Support

Our skilled technicians located in Peoria, AZ are available 7 days a week to provide the support you need when you need it most. 

Running Watts

3500 Gas / 3200 LPG

Starting Watts

4400 Gas / 4000 LPG

FIRMAN Engine

208cc

6 Gallon Gas Tank

22 Hr Run Time

LOADING...
No specifications available for this product.

Manuals

WH03562OF Operators Manual English

download

WH03562OF Operators Manual Spanish

download

WH03562OF Operators Manual French

download

WH03562OF QSSG English

download

WH03562OF QSSG French

download

WH03562OF QSSG Spanish

download

Watch

CO Alert Overview

Watch

WH03562OF Overview

Watch

WH03562OF Maintenance

Watch

WH03562OF Unboxing

@FIRMANpowerequipment
Image of a Woman holding a handle to an Inverter Generator and walking towards a pick up truck and trailer cart.
An image of a woman uncovering her FIRMAN Generator that is on her truck bed.
A man shows off his FIRMAN Accessories and Inverter Generator collection.
Image of a woman lifting her FIRMAN Inverter Generator with it's U-Shaped Handle
Image of a man holding a cup of coffee in the woods with a FIRMAN Power Generator that is connected to a power cord.
A FIRMAN generator is sitting on the bed of a white pick up truck. The truck is parked against a concrete wall.
Image of a small dog and a FIRMAN Inverter Generator with a suitcase handle, outside on a camping ground.
Image of a man sitting on FIRMAN Power Generator boxes and holding a small Inverter generator.