Eberspacher conversion

[gary3029]

Was wondering if anyone had converted a Eberspacher heater to heat water rather than blow hot air. I have one on my wooden boat, only two years old and if I can get it to heat water up it would be perfect for a job I have in mind. Any help ideas would be welcome.
Thanks

 

[mainmarine]

sell it and buy an Eberspacher water heater with radiators