Jack, My dealer also told me a side arm was the best way to go. If I was to do it again I would just get a 40 or 50 plate and not worry about the water heater, but after I put the side arm on, I didnt want to change everything besides the money I had put out. One more thing to think about is weather you have soft water, I have heard guys on hear say the plate heaters can build up deposits. Good luck
I agree now that I have it Ill leave it too I think once I put the plate exchanger on I will remove the recir pump their wont be no need for that anymore it will just be wasting electricity. Jack