Espar Airtronic S3 D2L
#2 in SplitFull review
For van, truck and boat owners who want a quiet, type-approved 2 kW heater that works at high altitude. It costs much more than clones but is built to run for thousands of hours.
Amazon $1,250$1,250
The Espar Airtronic S3 D2L is the better diesel heater overall, rated 3.5 to 3.3. The Espar Airtronic S3 D2L leads on type approval. The maXpeedingrods 2KW Bluetooth Heater wins on value. The maXpeedingrods 2KW Bluetooth Heater costs $1,150.01 less ($99.99 vs $1,250).
maXpeedingrods 2KW Bluetooth Heater
#8 in SplitFull review
A cheap small split heater for a van, truck cab or small boat cabin. Its fuel burn backs up the 2 kW rating, but the maker gives no warranty length or power figures.
Amazon $99.99$99.99
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 Espar Airtronic S3 D2L for type approval (type approved (ECE R122) vs no type approval published).
- Choose the maXpeedingrods 2KW Bluetooth Heater for value ($50 per kW ($99.99, 2 kW) vs $568 per kW ($1,250, 2.2 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 | Espar Airtronic S3 D2L | maXpeedingrods 2KW Bluetooth Heater |
|---|---|---|
| Overall rating | 3.5/5 | 3.3/5 |
| Value 25% | 2 $568 per kW ($1,250, 2.2 kW) | 78 $50 per kW ($99.99, 2 kW) |
| Type approval 20% | 100 type approved (ECE R122) | 0 no type approval published |
| Controls and safety 15% | 65 holds a set temperature, automatic altitude; no CO sensor | 72 holds a set temperature, automatic altitude, app; no CO sensor |
| Power draw 15% | 73 up to 27 W running | 50 power draw not published (neutral score used) |
| Warranty 15% | 50 2-year warranty | 50 warranty not published (neutral score used) |
| Low setting 10% | 96 down to 0.8 kW | 58 down to 1.3 kW (from its lowest fuel burn) |
Specifications
| Espar Airtronic S3 D2L | maXpeedingrods 2KW Bluetooth Heater | |
|---|---|---|
| Heating | ||
| Heat output (maker) | 2.2 kW | 2 kW |
| Lowest output | 0.8 kW | - |
| Fuel burn | 0.1 to 0.27 L/h | 0.16 to 0.26 L/h |
| Fuel tank | - | 9 L |
| Build | Split (installed) | Split (installed) |
| Power | ||
| Supply | 12V | 12V/24V |
| Running draw | 6 to 27 W | - |
| Starting draw | 90 W | - |
| Controls and safety | ||
| Thermostat | Yes | Yes |
| Automatic altitude | Yes, to 13,120 ft | Yes, to 18,050 ft |
| App | - | Bluetooth |
| Remote | - | Yes |
| CO shutoff | No | No |
| Type approval | ECE R122 | None published |
| Build | ||
| Dimensions | 12.2 x 4.5 x 4.8 in | 34 x 11.5 x 11.5 cm |
| Weight | 5.5 lb | - |
| Warranty | 2 years | - |
| Released | 2021 | - |