Hello!
Plan a trip to Nordkapp next season and need to install a diesel heater in our SM (we do not have the forced ventilation). I have searched on the forum but did not find the information I was looking for.
Location of a diesel heater could be in the engine room or in the large cockpit locker. You who have a diesel heater where is it located?
One could choose either air or a water distributed heater, advantage with the water distributed heater, easier to install the water pipe, but the heat elements takes large place. the hot air heater duct takes a lot of space as diameter is 90 mm or about 3½ inch. 
So would very much appreciate you experience and recommendations when it comes to install a diesel heater 
Paul on SY Kerpa SM#259, Lagos, Portugal