• Fuel- Diesel
  • Power- 1.5 kW-4kW
  • Operating Voltage– 12V
  • Fuel Consumption- 6.8-13.5 oz/h
  • Electricity Consumption– 1.0-3.9 A
  • Heat Vent- 51-86 cfm
  • Special Features- Fresh Air Vent
SKU: 40DT WALLAS Category:


The 40DT heater has excellent air volume capacity!

In our Wallas 40Dt 4 kW diesel heater, close attention has been paid to efficient blower output.

In addition to the efficient blower effect, our brush-less combustion blower and high quality main blower assure long lifetime.

Due to laminar burn process, combustion noise cannot be heard from the exhaust pipe, so the boat next to yours can also enjoy silence in the harbor.

When one warm air duct is lead to the front, the heating capacity is sufficient for even 15 m boats.

40 DT can be installed into a engine compartment. With the help of two air inlets you’ll get fresh air and strengthen the heating effect. This results from taking fresh air from outside and cabin air from inside to circulate the heat.

Wallas Remote Control allows you to heat up your boat remotely.

Laminar Combustion

The burning process in Wallas products is based on laminar combustion. Unlike turbine heaters that emit a very loud roaring or “jet engine” sound, our laminar combustion process is virtually silent, requiring no exhaust sound attenuation.

In addition to silent operation, our combustion process is also very clean. By maintaining perfect burner balance, meaning that the mix of oxygen, fuel, and temperature is correct, the process is very clean. A Wallas product will burn clean at all power settings, not requiring high power run periods to clean itself.

The 3 essential elements of a laminar flame

  1. The first required element is fuel. Fuel is pumped with a special solenoid valve pump. The pump is highly tolerant of voltage and current fluctuations, is very quiet and integrated into each Wallas product. A metered amount of fuel is pumped into the bottom of the burner (see No 1 in the picture).
  2. The second element is temperature. In the start phase, ignition temperature will be generated by a glow plug. When the flame ignites, it starts to heat up the radiator (see No 2 in the picture), and a short time later the glow plug turns off. The radiator reflects the heat to the bottom of the burner, and the resulting heat evaporates the liquid fuel into fuel vapor.
  3. The third element is retardation. There is a retardation zone in the burner, marked with a blue arrow. Retardation is needed to split the coal hydrogen chains. Diesel has more long aromatic chains than paraffin oil (kerosene) and thus needs longer retardation and higher temperature for breaking the chains entirely to achieve clean combustion.