What are best practices on hydronic heat and domestic hot water?

[belfert]

I really don't want to do is mess with the generator.  The generator is in fairly tight quarters due to enclosure it came with for one thing.

[donnreeves]

I also have a Seaward 11 gal water heater. I don't know why It takes so long to make hot water using the 45,000btu Pro-Heat and it's internal heat exchanger. I just assumed the exchanger is very small. I don't recall the btu rating of the flat plate exchanger, but it is about 6"x10'x2" thick. Sure does work.   Donn