How much space will an 8 kW diesel heater heat?

The maker rates it for 108–161 ft². That is a small van, a truck cab or a single room. Larger spaces will need insulation or a second unit.

Can it run from a 12V battery and a 24V system?

Yes. It is listed as compatible with both 12V and 24V DC, and it also runs from a 110V AC outlet. Check the voltage setting before first use.

Does it come with a fuel tank and exhaust?

The listing names only the remote as an accessory. Confirm the kit contents with the seller before buying, since a tank, fuel line, exhaust and ducting are needed to run it.

Is it safe to use indoors?

It is listed for indoor and outdoor use, but a diesel heater burns fuel and must vent exhaust gas outside. Route the exhaust away from windows, doors and sleeping areas, and fit a carbon monoxide alarm.

No noise figure is given. Diesel air heaters typically make a steady fan and fuel-pump ticking sound, which is noticeable in a small cab at night.

Is it certified or covered by a warranty?

No. It has no NRTL safety listing and no written warranty, so you take on the installation and safety checks yourself.

Where is the 12V/24V Diesel Heater 8KW cheapest?

At Walmart, for $188.66, as of our latest check.

Unbranded

12V/24V Diesel Heater 8KW

Best price now

$188.66at WalmartChecked 1 h ago

Prices are checked against each store and labelled with when.

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Unbranded

12V/24V Diesel Heater 8KW

Best price now

$188.66at WalmartChecked 1 h ago

Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Lowest price today: $188.66 at Walmart (checked Nov 12, 2026).

Our take on the 12V/24V Diesel Heater 8KW

This is a portable diesel air heater rated at 8 kW, sold as a kit with a remote control. It runs on 12V or 24V DC from a battery and can also be plugged into 110V AC. The maker claims it heats 108–161 ft² and reaches 210°F within about five minutes. It suits campers, van and truck owners, and workshop users who want off-grid heat. Against branded heaters like Webasto and Eberspächer, it offers far more heat output for the money but has no safety certification and no written warranty, so installation and exhaust routing are on you.

Best forVan and camper conversionsTruck cabs and sleeper berthsCold-weather campingWorkshops and garages without mains power

Pros

High 8 kW output for its size
Runs on 12V or 24V battery power
Also works from a 110V AC outlet
Remote control included
Compact and light enough to move between vehicles

Cons

No NT certification listing
No written warranty
Unbranded, so parts and support are uncertain
Fuel tank, exhaust and ducting not confirmed in the box
Diesel exhaust must be vented outside

12V/24V Diesel Heater 8KW prices at every store

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In stock
$188.66Checked 1 h ago
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12V/24V Diesel Heater 8KW price history

Lowest price we've seen: $188.66 on Nov 12 at Walmart. Tracked across 1 store since Nov 12.

About the 12V/24V Diesel Heater 8KW

This is an 8KW diesel heater that runs on 12V or 24V DC power.

It has 2 heat settings and comes with a remote control.

Fuel: Diesel
Power: 8KW
Heat settings: 2
Control: Remote
Use: Camping, indoor and outdoor
Color: Red
Height: 11.3 in
Weight: 19 lb
In the box: 1 heater, remote

Specifications

Fuel type: DieselSource
Power type: BatterySource
Rec. use: CampingSource
Brand: UnbrandedSource
Rec location: Indoor and OutdoorSource
Number of heat settings: 2Source
Watts: 8 WattsSource
Btu: 8000Source
Has nrtl listing certification: NSource
Has written warranty: NoSource
Color: RedSource
Control type: RemoteSource
Accessories: RemoteSource
Height: 11.3 inSource
Weight: 19 lbSource
Volts: 12 VoltsSource
Count: 1Source
Actual Color: Red+24V

Questions and answers

How much space will an 8 kW diesel heater heat?: The maker rates it for 108–161 ft². That is a small van, a truck cab or a single room. Larger spaces will need insulation or a second unit.
Can it run from a 12V battery and a 24V system?: Yes. It is listed as compatible with both 12V and 24V DC, and it also runs from a 110V AC outlet. Check the voltage setting before first use.
Does it come with a fuel tank and exhaust?: The listing names only the remote as an accessory. Confirm the kit contents with the seller before buying, since a tank, fuel line, exhaust and ducting are needed to run it.
Is it safe to use indoors?: It is listed for indoor and outdoor use, but a diesel heater burns fuel and must vent exhaust gas outside. Route the exhaust away from windows, doors and sleeping areas, and fit a carbon monoxide alarm.
How loud is it?: No noise figure is given. Diesel air heaters typically make a steady fan and fuel-pump ticking sound, which is noticeable in a small cab at night.
Is it certified or covered by a warranty?: No. It has no NRTL safety listing and no written warranty, so you take on the installation and safety checks yourself.
Where is the 12V/24V Diesel Heater 8KW cheapest?: At Walmart, for $188.66, as of our latest check.