The VEVOR XMZ-D2 8kW Bluetooth Heater is the better diesel heater overall, rated 3.2 to 3.2. The Hcalory UNIT 2 8kW Diesel Heater wins on controls and safety. The VEVOR XMZ-D2 8kW Bluetooth Heater costs $68.44 less ($101.55 vs $169.99).
A cheap split kit with Bluetooth control and automatic altitude adjustment, for DIY installs in vans and campers that travel high. Real output is far below 8 kW.
Amazon $119.90 VEVOR $101.55A well-featured split heater for van and RV builds that want automatic altitude handling and a big tank; expect about 3 kW of real heat, not 8.
Amazon $169.99Prices 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.
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 | VEVOR XMZ-D2 8kW Bluetooth Heater | Hcalory UNIT 2 8kW Diesel Heater |
|---|---|---|
| Overall rating | 3.2/5 | 3.2/5 |
| Value 25% | 100 $20 per kW ($101.55, 5 kW); 8 kW claimed, more than its fuel burn can supply | 72 $61 per kW ($169.99, 2.8 kW); 8 kW claimed, more than its fuel burn can supply |
| Type approval 20% | 0 no type approval published | 0 no type approval published |
| Controls and safety 15% | 80 holds a set temperature, automatic altitude, app, timer; no CO sensor | 90 holds a set temperature, automatic altitude, app, timer |
| Power draw 15% | 44 up to 40 W running | 50 power draw not published (neutral score used) |
| Warranty 15% | 0 1-year warranty | 0 1-year warranty |
| Low setting 10% | 58 down to 1.3 kW (from its lowest fuel burn) | 83 down to 1 kW (from its lowest fuel burn) |
| VEVOR XMZ-D2 8kW Bluetooth Heater | Hcalory UNIT 2 8kW Diesel Heater | |
|---|---|---|
| Heating | ||
| Heat output (maker) | 8 kW claimed (about 5 kW from its fuel burn) | 8 kW claimed (about 2.8 kW from its fuel burn) |
| Fuel burn | 0.16 to 0.62 L/h | 0.12 to 0.35 L/h |
| Fuel tank | 10 L | 15 L |
| Build | Split (installed) | Split (installed) |
| Power | ||
| Supply | 12V | 12V/24V |
| Running draw | 40 W | - |
| Controls and safety | ||
| Thermostat | Yes | Yes |
| Automatic altitude | Yes, to 18,045 ft | Yes, to 16,400 ft |
| App | Bluetooth | Bluetooth |
| Timer | Yes | Yes |
| Remote | Yes | Yes |
| CO shutoff | No | - |
| Type approval | None published | None published |
| Build | ||
| Dimensions | 14.8 x 5.5 x 6.9 in | 15.71 x 5.59 x 6.97 in |
| Weight | 13.6 lb | 16.8 lb |
| Warranty | 1 year | 1 year |
| Released | - | 2026-07 |
