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 is the better diesel heater overall, rated 3.5 to 2.8. The Autoterm Air 2D leads on type approval, warranty and low setting. The LF Bros Split 2kW T3 Diesel Heater wins on value. The LF Bros Split 2kW T3 Diesel Heater costs $760 less ($189.99 vs $949.99).
LF Bros Split 2kW T3 Diesel Heater
#32 in SplitFull review
A compact 2 kW split heater for car and small truck cabs, though it costs as much as LF Bros’s 5 kW kit.
Amazon $189.99$189.99
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.
Which should you buy?
- Choose the Autoterm Air 2D for type approval (type approved (ECE R122) vs no type approval published), warranty (2-year warranty vs 1-year warranty) and low setting (down to 0.8 kW vs down to 1.1 kW).
- Choose the LF Bros Split 2kW T3 Diesel Heater for value ($95 per kW ($189.99, 2 kW) vs $475 per kW ($949.99, 2 kW)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every split diesel heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | Autoterm Air 2D | LF Bros Split 2kW T3 Diesel Heater |
|---|---|---|
| Overall rating | 3.5/5 | 2.8/5 |
| Value 25% | 7 $475 per kW ($949.99, 2 kW) | 58 $95 per kW ($189.99, 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 | 43 timer; fixed levels only |
| 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 | 75 down to 1.1 kW |
Specifications
| Autoterm Air 2D | LF Bros Split 2kW T3 Diesel Heater | |
|---|---|---|
| Heating | ||
| Heat output (maker) | 2 kW | 2 kW |
| Lowest output | 0.8 kW | 1.1 kW |
| Fuel burn | 0.1 to 0.24 L/h | 0.18 to 0.53 L/h |
| Build | Split (installed) | Split (installed) |
| Power | ||
| Supply | 12V | 12V |
| Running draw | 10 to 29 W | - |
| Controls and safety | ||
| Thermostat | Yes | No |
| Automatic altitude | Yes, to 13,780 ft | - |
| App | No | - |
| Timer | No | Yes |
| Remote | No | - |
| CO shutoff | No | - |
| Type approval | ECE R122 | None published |
| Build | ||
| Dimensions | 12.2 x 4.7 x 5.7 in | 13.2 x 4.57 x 4.68 in |
| Weight | 6.4 lb | - |
| Warranty | 2 years | 1 year |