If the set temperature is reached, will the low speed also stop? Do the Eber hydronic heaters need one matrix fan always blowing? I ask this as it seems that this controller operates independantly of the hydronic boiler and in summer, you want the boiler heating the calorifier, not hot air in the boat! Thanks

this Eberspacher controller is planned to control only the fans on the blower matrix, thus allowing comfortable cabin/room temperature. That's correct, it is not designed to control the Eberspacher heater - in Summer therefore your heater will still function to provide domestic hot water via your calorifier.