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.
Price checked October 30, 2026. As an Amazon Associate we earn from qualifying purchases.
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
| Model number | M-5S Ultra |
|---|---|
| Heating | |
| Heat output (maker) | 8 kW claimed (about 2.9 kW from its fuel burn) |
| Fuel burn | 0.12 to 0.36 L/h |
| Fuel tank | 5 L |
| Build | All in one |
| Power | |
| Supply | 12V/24V/110V |
| Controls and safety | |
| Thermostat | Yes |
| Automatic altitude | Yes, to 18,050 ft |
| App | Bluetooth |
| Remote | Yes |
| CO shutoff | Yes |
| Type approval | None published |
| Build | |
| Warranty | 2 years |
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.
Amazon $1,599.99A 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.
Amazon $77.69A 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.
Amazon $101Compare the Mudiro M-5S Ultra Diesel Heater with any other diesel heater →
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