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Firman H03652 Spec Review

The Firman H03652 is an open frame dual fuel portable generator with a rated wattage of 3650 W and a starting wattage of 4550 W.

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Description

The H03652 Dual fuel generator can run on both Gas and Liquid Propane fuel, giving you flexibility during a storm, or when you’re out camping. This generator features 4550 starting watts and 3650 running watts (4100/3300 LPG) with a reliable recoil start system. (source: Firman (opens in a new tab))

Zoom on the Firman H03652

In a nutshell, the Firman H03652 is a portable generator mostly geared towards:

  • RV travellers wishing to enhance their freedom and nomad lifestyle
  • People occasionally participating in outdoor fairs, festivals or events
  • Homeowners who want to be sure of their ability to power their fridges, cooking tools, heating and lighting equipment during power failures
  • Professionals who want to be able to deliver results, even during a power failure

The following sections will present you in detail its power characteristics, the different outlets it offers, its overall portability, the extra features it benefits from, and any relevant emission compliance details.

Power & Run Time

The Firman H03652 in use

The Firman H03652

Thanks to its dual-fuel technology, the Firman H03652 delivers 120V and offers power and versatility. When gasoline-powered, it benefits from a running wattage of 3650W and a peak wattage of 4550W. When propane-powered, it has 3300 rated watts and 4100 peak watts.

At a noise rating of 67 dBA (less noisy than background music), the generator is started via a simple traditional pull-start mechanism.

As for its running time, the H03652, along with its 5 gallons fuel capacity, can run for around 14 hours at 50% load with a full tank filled with gasoline (fuel consumption around 0.36 GPH). If propane is used, it can operate for around 8 hours (on a 20 lbs tank - propane consumption around 0.59 GPH).

As the H03652 has a relatively high THD (<25%), it is not recommended to use it to power sensitive electronic devices.

Outlets

The control panel provides the upcoming 4 AC outlets:

Duplex 120V 20A (5-20R) GFCI
120V 30A (L5-30R) receptacle
120V 30A (TT-30R) receptacle

This Firman generator is RV Ready, thanks to its TT-30R receptacle (TT stands for 'Travel Trailer').

Portability

The dimensions of the Firman H03652, which are L25.7 x W21.8 x H21.6 in, and its typical, open frame design provides stability and enables the generator to be raised above ground level. The featured design is ideal for the outdoors and all tough environments.

As the generator's weight is 112 pounds, manually moving it or transporting it may be challenging, despite the fact that it is technically considered 'portable' (movable). However, its challenging mobility is solved by its wheel kit (⌀8") and its folding handle, which will ease its displacement, once it is on the floor.

Features

Panel of the Firman H03652

The H03652's control panel

The H03652's control center features a convenient meter, which displays voltage, frequency and lifetime hours to aid you with the monitoring of its status and activity.

The fuel level of the generator can be determined quickly, easily, and conveniently with the help of its built-in fuel gauge.

From a security standpoint, the product offers an automatic low oil shut-off and an overload protection (circuit breaker), allowing you to use it with a peace of mind.

While the standard documentation and an owner's manual (opens in a new tab), helpful for starting the device promptly, come with the Firman H03652, the following accessories are also included: funnel, propane hose, oil and tool kit.

Emissions

The Firman H03652 is EPA-approved and CARB-compliant. It can therefore be sold and purchased in all 50 states, including California.

Moreover, it features a spark arrestor and thus, may be used in forested areas.

Product Video

The Firman H03652 versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Firman H03652 compare to generators of similar power (between 3500 and 4500 W).

  • Since the generator weighs in at a dry weight of 112 lbs, the Firman H03652 belongs in the expected weight range for devices which can produce between 3500 and 4500 rated watts. Regarding dry weight, one of the champions in the same power range is the WEN GN400i, with a dry weight of only 66.1 lbs.
  • As this generator can emit noise as low as 67 dBA, it finds itself in the average expected noise for this kind of power. For those who are looking for a less noisy device, we suggest the Cummins Onan P4500i. With just 52 dBA, it is one of the most quiet devices in this power range.
  • Since the H03652 boasts with a run time of around 14 hours at 50% load, it can be safely judged as a device of a higher run time than most generators of a comparable output. Concerning the run times, one of the several devices with a comparable output, offering the highest autonomy, is the Honda EB4000X, which is able to run for around 16 hours.
  • The run time is important, but also hugely depends on the capacity of the fuel tank and doesn't mean much if we don't talk about fuel consumption as well. Standing at an estimated 0.36 GPH (gallon per hour) at a 50% load, this generator is somewhat average in this area compared to other devices, within the aforementioned wattage range. If you are concerned with gasoline efficiency, having a fuel consumption of just 0.17 GPH, the Westinghouse iGen4200 is a device you should look out for.
According to our stats, the following comparison is pretty popular: Firman H03652 vs Firman H03651.

Price comparison

As you can see from this interactive chart, when compared to other 3500-4500W generators, the Firman H03652 is on the cheap side of the price range.

It can therefore be a really good buy if you're looking to acquire a budget generator.

The bottom line

STRENGTHS:
  • Inexpensive
  • Several accessories included
  • GFCI Outlets
  • RV Ready
  • Dual Fuel
  • High run time
AVERAGE SPECS:
  • Decent weight (112 lbs)
  • Acceptable noise (67 dBA)
  • Decent fuel efficiency
WEAKNESSES:
  • No electric start

Do you own the Firman H03652 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterNo
PortableYes
Parallel capableNo
RV readyYes
FuelDual Fuel (gasoline/propane)
Engine208 cc Firman Max-Pro Series OHV 4-stroke
Starting systemRecoil
VoltageAC: 120V 60 Hz
Power
 GasolinePropane
Running watts3650 W3300 W
Starting watts4550 W4100 W
Running amps30.4 amps27.5 amps
Peaks amps37.9 amps34.2 amps
Run time @50% load14 h8 h
Run time @25% loadN/AN/A
Features
GFCI outletsYes
Covered outletsYes
Automatic Voltage RegulationYes
AC outlets
  • 1x Duplex 120V 20A (5-20R) GFCI
  • 1x 120V 30A (L5-30R)
  • 1x 120V 30A (TT-30R)
DC outletsNo
Data centerVFT
IndicatorsNo
Fuel tankSteel, 5 gal
Fuel gaugeYes
Misc
Weight112 lbs
Approx. dimensions (L x W x H)25.7 x 21.8 x 21.6 in
Noise (lower limit)67 dBA
THD< 25%
EmissionsCARB, EPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralBonded to frame
Accessories includedOil, funnel, tool kit and propane hose
Warranty3 years
SeriesHybrid

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.

About FIRMAN Power Equipment

Founded in 1999, Firman Power Equipment is a company with a short, but established history in the power equipment industry. Based in Arizona, the company offers an immense range of products, including power tools, automotive equipment, storage utilities, work wear, but most importantly, a wide selection of generators of all sizes, designs and outputs. Interestingly, Firman is a wholly owned subsidiary of the China National Machinery Industry Corporation - a somewhat well renowned company in China and acts as a de facto distributor of their products in the US.

Warranty Information

The Firman H03652 is covered under a warranty for up to 3 years. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Firman generators, please consult Firman's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-844-FIRMAN1 (844-347-6261).

Questions & Answers

What can it power?
Examples of items that can be simultaneously powered.
The examples below are based on a maximum load of 80% and estimated wattages. For a more accurate estimation, use our generator size calculator.
ItemRunning WattsStarting Watts
At homeAC (10,000 BTU)15002200
Refrigerator (energy star)1921192
Vacuum cleaner10751175
Radio100100
Pair of small speakers4545
Total2912 W3912 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Electric grill16501650
Set of 5 LED light bulbs5555
Total2895 W3485 W
For workTable saw18004500
Total1800 W4500 W
Can the Firman H03652 dual fuel model be fitted to use natural gas? (Asked January 20, 2020)

Firman doesn't seem to have an official natural gas conversion kit. You could have a look at this article: https://www.propane101.com/lpgasapplianceconversions.htm. Needless to say, without an official conversion kit, such conversion would immediately void any warranty you may have.

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