For your consideration we have a used 34000 BTU Espar Mll D10 Hydronic heater in 12 volts. Comes with Foenix Marine Services exclusive  unused 4 zone hook up panel complete with diagnostic port. The heater has been thoroughly test run. A new circulation pump was installed. Comes with an Edith computer read out showing low hours, around 500 hours, and no faults. The Mll D10 is a current Espar model and lists at around 2900. The muti zone panel lists for $359.00. A buy it now price of $900.00 represents a tremendous value.