There are two options for heat adjustment of Nautic Diesel models. When controlled with the Info Control Panel, the heat is adjusted by a thermostat. In addition to heating, the device can be used as a fresh air fan. 30D takes the heating air from the space where it is installed. The heater has a low power consumption, and it is very easy to install. 40D takes the air through air hoses enabling the heater to be installed, for instance, in the engine compartment. The operating noise of both models is very low. All components are made of stainless materials.