Best All-in-One Diesel Heaters Ranked

For overlanders, ice fishers and boat owners who want a portable heater with a proven, type-approved core and will pay for it. Clone all-in-ones give similar heat for a fraction of the price.

A cheap all-in-one heater for tents, garages and vans that adds a CO shutoff and automatic altitude adjustment, though its real output is well under the 8 kW rating.

A very cheap heater with thermostat, app control and a two year warranty, for tents, garages and occasional van use. Expect closer to 4.2 kW than the 8 kW on the box.

A cheap upright all-in-one heater with an app, timer and automatic altitude adjustment, for tents, garages and high-country camping. Expect well under its 8 kW rating.

A cheap all-in-one heater with app control and a two year warranty, for tents and small vans, with real output closer to 3.6 kW.

A budget toolbox heater for tents, garages and vans with a CO shutoff and a thermostat. Treat it as about a 4 kW heater, not 8 kW.

A cheap carry-handle heater for garages, campers and vans that still holds a set temperature. Expect about 3.6 kW of heat, not 8.

A budget toolbox heater for vans, garages and camps with the smart controls of pricier models. Expect about 3 kW of heat, not 8.

A budget all-in-one heater with a big tank and automatic altitude adjustment, for garages, tents and campers that need long runtimes.

A basic all-in-one heater with a big tank and a wall adapter, for garages and tents where an app and altitude mode are not needed.

A mid-priced toolbox heater for vans, cabins and camps that holds a room temperature well and handles high altitude. Expect about 3 kW of heat, not 8.

A rolling toolbox heater with app control and a CO alarm, for garages and job sites, though its 8 kW rating has no fuel figure behind it.

A low-cost all-in-one heater with a large tank and a wall adapter, for garages and tents at low altitude.

A plain all-in-one heater with a big tank and a wall adapter, for garages and workshops that want long runtimes without extras.

A budget portable heater for garages, tents and vans with a thermostat, timer and wall power. Treat it as about a 3 kW heater, not 8 kW.

A portable all-in-one heater with a CO shutoff and Bluetooth control, for garages, workshops and camping. Expect well under half its 8 kW rating.

A portable all-in-one heater with a CO shutoff and Bluetooth control in a camouflage case, for camping, garages and workshops. Real output is well under 8 kW.

A portable heater for tents, garages and vans with WiFi control, a thermostat and a CO shutoff at a mid price. Treat it as about a 4 kW heater, not 8 kW.

A well-equipped toolbox heater for campers and garages that want long runtimes, altitude adjustment and quiet nights. Expect about 3 kW of heat, not 8.

A portable toolbox heater for tents, garages and vans that wants WiFi control and a CO shutoff. Treat it as about a 4 kW heater, not 8 kW.

A small portable heater for a car, truck cab or tent where 8 kW clones are far too much. Its fuel figures back up its 2 kW rating.

A basic all-in-one heater with a remote and wall power, but its listing leaves out too many details to recommend over better documented rivals.

A portable heater with a thermostat and altitude compensation for high mountain camping and cabins, at a high price for what LF Bros publishes about it.

A compact portable heater for small garages, tents and vans that need mains or battery power and a timer.

A portable heater with app control and tidy storage for garages, trucks and camps. Expect about 3 kW of heat, not 8.

A portable heater for tents, ice fishing and car camping from a brand that publishes honest output and power figures. Good for running off a power station.

A portable heater for tents, garages and vans for buyers who want brushless motors, WiFi control and a CO shutoff. Treat it as about a 4 kW heater, not 8 kW.

A pricier all-in-one heater with Bluetooth control and an insulated case, for tents and boats, but with no fuel figures to check its 5 kW rating.

A small, cheap portable heater for a car, tent or small camper, with a CO shutoff that most budget heaters lack.

A portable toolbox heater for a garage, shop, tent or camper that has a wall outlet or a battery. Treat it as about a 3 kW heater, not 9 kW.

A plug-and-play portable heater for garages, workshops and tents, with mains power included but few controls.

One of the cheapest all-in-one heaters with Bluetooth control, for tents and small spaces, though its 8 kW rating has no fuel figure behind it.

A quiet, low-draw portable heater for tents and vans that runs off a battery, with honest output figures but no app.

For tents, ice fishing and remote cabins with no battery to spare. You pay a large premium for the self-powered design, and the controls are basic.