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 Sunster TR B1 rates 2.8 among all in one ones. The Sunster TR B1 costs $817 less ($132.99 vs $949.99).
Sunster TR B1
#21 in All in oneFull review
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.
Amazon $132.99$132.99
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 | Sunster TR B1 |
|---|---|---|
| Overall rating | 3.5/5 | 2.8/5 |
| Value 25% | 7 $475 per kW ($949.99, 2 kW) | 56 $66 per kW ($132.99, 2 kW) |
| Type approval 20% | 100 type approved (ECE R122) | 0 no type approval published |
| Controls and safety 15% | 50 holds a set temperature, automatic altitude; no CO sensor | 55 app, timer; no CO sensor |
| Power draw 15% | 69 up to 29 W running | 50 power draw not published (neutral score used) |
| Warranty 15% | 50 2-year warranty | 0 1-year warranty |
| Low setting 10% | 100 down to 0.8 kW | 83 down to 1 kW |
Specifications
| Autoterm Air 2D | Sunster TR B1 | |
|---|---|---|
| Heating | ||
| Heat output (maker) | 2 kW | 2 kW |
| Lowest output | 0.8 kW | 1 kW |
| Fuel burn | 0.1 to 0.24 L/h | 0.1 to 0.26 L/h |
| Fuel tank | - | 5 L |
| Build | Split (installed) | All in one |
| Power | ||
| Supply | 12V | 12V/24V/110V/240V |
| Running draw | 10 to 29 W | - |
| Controls and safety | ||
| Thermostat | Yes | - |
| Automatic altitude | Yes, to 13,780 ft | - |
| App | No | Bluetooth |
| Timer | No | Yes |
| Remote | No | Yes |
| CO shutoff | No | No |
| Type approval | ECE R122 | None published |
| Build | ||
| Noise | - | 35 dB |
| Dimensions | 12.2 x 4.7 x 5.7 in | - |
| Weight | 6.4 lb | 15.7 lb |
| Warranty | 2 years | 1 year |
| Released | - | 2026-08 |