Webasto Air Top Evo 55
#13 in SplitFull review
For 24V trucks, buses and larger motorhomes that need a type-approved 5 kW heater with automatic altitude adjustment. It costs far more than clone heaters of the same size.
Amazon $1,697.89$1,697.89
The Webasto Air Top Evo 55 is the better diesel heater overall, rated 3.1 to 2.9. The Webasto Air Top Evo 55 leads on type approval and controls and safety. The LF Bros Split T3 5kW Diesel Heater wins on value and low setting. The LF Bros Split T3 5kW Diesel Heater costs $1,507.90 less ($189.99 vs $1,697.89).
LF Bros Split T3 5kW Diesel Heater
#25 in SplitFull review
A basic 5 kW split kit for truck, RV and boat installs, with a timer but no thermostat.
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 Webasto Air Top Evo 55 for type approval (type approved (ECE R122) vs no type approval published) and controls and safety (holds a set temperature, automatic altitude; no CO sensor vs timer; fixed levels only).
- Choose the LF Bros Split T3 5kW Diesel Heater for value ($38 per kW ($189.99, 5 kW) vs $309 per kW ($1,697.89, 5.5 kW)) and low setting (down to 1.4 kW vs down to 1.5 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 | Webasto Air Top Evo 55 | LF Bros Split T3 5kW Diesel Heater |
|---|---|---|
| Overall rating | 3.1/5 | 2.9/5 |
| Value 25% | 21 $309 per kW ($1,697.89, 5.5 kW) | 87 $38 per kW ($189.99, 5 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 | 43 timer; fixed levels only |
| Power draw 15% | 0 up to 130 W running | 50 power draw not published (neutral score used) |
| Warranty 15% | 50 warranty not published (neutral score used) | 0 1-year warranty |
| Low setting 10% | 42 down to 1.5 kW | 50 down to 1.4 kW |
Specifications
| Webasto Air Top Evo 55 | LF Bros Split T3 5kW Diesel Heater | |
|---|---|---|
| Heating | ||
| Heat output (maker) | 5.5 kW | 5 kW |
| Lowest output | 1.5 kW | 1.4 kW |
| Fuel burn | 0.18 to 0.67 L/h | 0.18 to 0.53 L/h |
| Fuel tank | - | 10 L |
| Build | Split (installed) | Split (installed) |
| Power | ||
| Supply | 24V | 12V |
| Running draw | 15 to 130 W | - |
| Controls and safety | ||
| Thermostat | Yes | No |
| Automatic altitude | Yes, to 7,220 ft | - |
| Timer | - | Yes |
| CO shutoff | No | - |
| Type approval | ECE R122 | None published |
| Build | ||
| Dimensions | 16.7 x 5.8 x 6.4 in | 14.9 x 5.6 x 5.9 in |
| Weight | 13 lb | - |
| Warranty | - | 1 year |
| Released | 2014-10 | - |