The boat is heated by a Webasto Thermo 90 ST D. This device is manually turned on when needed and can then run by automatically adjust the delivered heat in relation to the demand.
The cabin heater runs on diesel from the same tank as the engine. It has a separate valve from the dieseltank (just beside valve for the engine. The heater heats up a small tank of hot water (not the same as the hot tap water tank). The hot water is circulated to a separate heater for each cabin and the saloon. These heaters has a fan blowing hot air heated by the warm water. Each room has its own thermostat.
When turned on the it initially delivers 9.1KW of energy, consuming 1.1 liter of diesel per hour. Once the circulating liquid is heated it goes down to deliver anything between 1.8 – 7.6KW, consuming 0.20 – 0.90 liter of diesel per hour, depending on the settings of the thermostats in each cabin and the outside temperature.
The heater is controlled by a knob at the corner of the couch in the saloon. This knob has three positions. The middle position is off. Turning it clockwise starts the heater. It will take a few minutes before the fan in each cabin / saloon kicks in. Turn off the heater by gently turning slightly counter-clockwise to the middle position. The heater will still run for a few minutes to cool down.
Please note that the heater generates hot exhausts on the outside. Ensure nothing is too close.