VEVOR XMZ-D2 2kW Bluetooth Heater
#14 in SplitFull review
A small, cheap split heater with Bluetooth control and automatic altitude adjustment, sized for cars, small vans and boat cabins.
Amazon $99.90$99.90
3.1/5
For 24V trucks and buses that need a type-approved 4 kW heater with automatic altitude adjustment. The high price buys Webasto build quality and approval, not more heat.
- 4 kWHeat output
- 0.18 to 0.49 L/hFuel burn
- 15 to 55 WPower draw
- ECE R122Type approval
Check price at Amazon$1,945.95
Price checked October 30, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Type approved to ECE R122 for vehicle installation
- Adjusts itself for altitude up to about 7,200 ft
- Enough heat for a sleeper cab, large van or small motorhome
- Low 15 W draw on its lowest setting
Cons
- Very expensive for 4 kW at nearly $1,950
- The listing does not say which controller is in the kit
- 24V only in this kit, so most vans and RVs need the 12V version
The Webasto Air Top EVO family
Every Webasto Air Top EVO model we rank, smallest first. Ratings compare each against its own type.
| Model | Heat output | Rating | Price |
|---|---|---|---|
| Webasto Air Top Evo 40 (this one) | 4 kW | 3.1/5 | $1,945.95 |
| Webasto Air Top Evo 55 | 5.5 kW | 3.1/5 | $1,697.89 |
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Model number | Air Top Evo 40 diesel 24V kit |
|---|---|
| Heating | |
| Heat output (maker) | 4 kW |
| Lowest output | 1.5 kW |
| Fuel burn | 0.18 to 0.49 L/h |
| Build | Split (installed) |
| Power | |
| Supply | 24V |
| Running draw | 15 to 55 W |
| Controls and safety | |
| Thermostat | Yes |
| Automatic altitude | Yes, to 7,220 ft |
| CO shutoff | No |
| Type approval | ECE R122 |
| Build | |
| Dimensions | 16.7 x 5.8 x 6.4 in |
| Weight | 13 lb |
| Released | 2014-10 |
Alternatives in this type
WAYSKA WKH-B3 8kW Diesel Heater
#15 in SplitFull review
A complete split kit with a big tank and remote for trucks, trailers and boats, but it is a generic clone priced well above others like it.
Amazon $189.99$189.99
VEVOR 8kW 12V Diesel Air Heater
#17 in SplitFull review
A bare-bones, very cheap split heater kit for DIY installs in trucks, campers and boats at low altitude. Real output is closer to 3 kW than 8.
Amazon $83.90$83.90
Compare
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