Autoterm Air 2D
#3 in SplitFull review
For van and boat owners who want a type-approved 2 kW heater for less than Webasto or Espar. Add a timer panel if you want it warm before you wake.
Amazon $949.99$949.99
The Autoterm Air 2D rates 3.5 among split diesel heaters; the Autoterm Air 2D Portable rates 3.4 among all in one ones. The Autoterm Air 2D costs $650 less ($949.99 vs $1,599.99).
Autoterm Air 2D Portable
#1 in All in oneFull review
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 $1,599.99$1,599.99
Prices were last checked October 30, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different type classes (split and all in one), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | Autoterm Air 2D | Autoterm Air 2D Portable |
|---|---|---|
| Overall rating | 3.5/5 | 3.4/5 |
| Value 25% | 7 $475 per kW ($949.99, 2 kW) | 0 $800 per kW ($1,599.99, 2 kW) |
| Type approval 20% | 100 type approved (ECE R122) | 100 type approved (ECE R122) |
| Controls and safety 15% | 50 holds a set temperature, automatic altitude; no CO sensor | 50 holds a set temperature, automatic altitude; no CO sensor |
| Power draw 15% | 69 up to 29 W running | 69 up to 29 W running |
| Warranty 15% | 50 2-year warranty | 50 2-year warranty |
| Low setting 10% | 100 down to 0.8 kW | 100 down to 0.8 kW |
Specifications
| Autoterm Air 2D | Autoterm Air 2D Portable | |
|---|---|---|
| Heating | ||
| Heat output (maker) | 2 kW | 2 kW |
| Lowest output | 0.8 kW | 0.8 kW |
| Fuel burn | 0.1 to 0.24 L/h | 0.1 to 0.24 L/h |
| Build | Split (installed) | All in one |
| Power | ||
| Supply | 12V | 12V |
| Running draw | 10 to 29 W | 10 to 29 W |
| Controls and safety | ||
| Thermostat | Yes | Yes |
| Automatic altitude | Yes, to 13,780 ft | Yes, to 13,780 ft |
| App | No | No |
| Timer | No | No |
| Remote | No | No |
| CO shutoff | No | No |
| Type approval | ECE R122 | ECE R122 |
| Build | ||
| Dimensions | 12.2 x 4.7 x 5.7 in | 24 x 16.5 x 19 in |
| Weight | 6.4 lb | 25.5 lb |
| Warranty | 2 years | 2 years |